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-d19836b [2018-09-26 21:16:57,743 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:16:57,745 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:16:57,756 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:16:57,757 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:16:57,758 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:16:57,759 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:16:57,760 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:16:57,762 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:16:57,763 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:16:57,764 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-26 21:16:57,787 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 [2018-09-26 21:16:57,801 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:16:57,802 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:16:57,803 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:16:57,803 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:16:57,803 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:16:57,804 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:16:57,804 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:16:57,804 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:16:57,804 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:16:57,804 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:16:57,805 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:16:57,805 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:16:57,805 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:16:57,805 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:16:57,805 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:16:57,805 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:16:57,806 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:16:57,806 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:16:57,806 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:16:57,806 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:16:57,806 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:16:57,807 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:16:57,807 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:16:57,807 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:16:57,807 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:16:57,808 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:16:57,808 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:16:57,808 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:16:57,808 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:16:57,808 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:16:57,852 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:16:57,866 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:16:57,869 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:16:57,871 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:16:57,871 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:16:57,872 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl [2018-09-26 21:16:57,872 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl' [2018-09-26 21:16:57,919 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:16:57,922 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:16:57,923 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:16:57,923 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:16:57,923 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:16:57,943 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 26.09 09:16:57" (1/1) ... [2018-09-26 21:16:57,955 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 26.09 09:16:57" (1/1) ... [2018-09-26 21:16:57,962 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:16:57,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:16:57,963 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:16:57,963 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:16:57,978 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 26.09 09:16:57" (1/1) ... [2018-09-26 21:16:57,978 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 26.09 09:16:57" (1/1) ... [2018-09-26 21:16:57,979 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 26.09 09:16:57" (1/1) ... [2018-09-26 21:16:57,980 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 26.09 09:16:57" (1/1) ... [2018-09-26 21:16:57,983 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 26.09 09:16:57" (1/1) ... [2018-09-26 21:16:57,985 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 26.09 09:16:57" (1/1) ... [2018-09-26 21:16:57,986 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 26.09 09:16:57" (1/1) ... [2018-09-26 21:16:57,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:16:57,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:16:57,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:16:57,990 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:16:57,991 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 26.09 09:16:57" (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 [2018-09-26 21:16:58,068 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-26 21:16:58,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-26 21:16:58,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-26 21:16:58,331 INFO L346 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-26 21:16:58,332 INFO L202 PluginConnector]: Adding new model nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:16:58 BoogieIcfgContainer [2018-09-26 21:16:58,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:16:58,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:16:58,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:16:58,339 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:16:58,340 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 26.09 09:16:57" (1/2) ... [2018-09-26 21:16:58,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60729e87 and model type nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:16:58, skipping insertion in model container [2018-09-26 21:16:58,341 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 26.09 09:16:58" (2/2) ... [2018-09-26 21:16:58,343 INFO L112 eAbstractionObserver]: Analyzing ICFG nested1.i_4.bplTransformedIcfg_BEv2_12.bpl [2018-09-26 21:16:58,353 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:16:58,365 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:16:58,418 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:16:58,419 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:16:58,420 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:16:58,420 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:16:58,420 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:16:58,420 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:16:58,420 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:16:58,421 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:16:58,421 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:16:58,437 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-09-26 21:16:58,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-26 21:16:58,443 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:58,444 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-26 21:16:58,446 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:58,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:58,452 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-09-26 21:16:58,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:58,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:58,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:58,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:58,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:58,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:58,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:58,629 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:16:58,630 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-26 21:16:58,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:16:58,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:16:58,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:16:58,648 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-09-26 21:16:58,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:58,710 INFO L93 Difference]: Finished difference Result 11 states and 17 transitions. [2018-09-26 21:16:58,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:16:58,712 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-26 21:16:58,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:58,729 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:16:58,729 INFO L226 Difference]: Without dead ends: 7 [2018-09-26 21:16:58,734 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 [2018-09-26 21:16:58,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-26 21:16:58,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2018-09-26 21:16:58,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-26 21:16:58,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2018-09-26 21:16:58,800 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 7 transitions. Word has length 3 [2018-09-26 21:16:58,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:58,803 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 7 transitions. [2018-09-26 21:16:58,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:16:58,804 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 7 transitions. [2018-09-26 21:16:58,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-26 21:16:58,805 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:58,805 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-26 21:16:58,805 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:58,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:58,806 INFO L82 PathProgramCache]: Analyzing trace with hash 28854189, now seen corresponding path program 1 times [2018-09-26 21:16:58,806 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:58,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:58,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:58,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:58,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:58,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:58,900 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:16:58,900 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-26 21:16:58,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:16:58,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:16:58,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:16:58,906 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. Second operand 3 states. [2018-09-26 21:16:58,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:58,980 INFO L93 Difference]: Finished difference Result 11 states and 14 transitions. [2018-09-26 21:16:58,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:16:58,983 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-09-26 21:16:58,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:58,984 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:16:58,984 INFO L226 Difference]: Without dead ends: 7 [2018-09-26 21:16:58,985 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 [2018-09-26 21:16:58,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-26 21:16:58,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-26 21:16:58,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-26 21:16:58,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-09-26 21:16:58,988 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-09-26 21:16:58,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:58,988 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-09-26 21:16:58,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:16:58,989 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2018-09-26 21:16:58,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 21:16:58,989 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:58,989 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-26 21:16:58,990 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:58,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:58,990 INFO L82 PathProgramCache]: Analyzing trace with hash 894431694, now seen corresponding path program 1 times [2018-09-26 21:16:58,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:58,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:58,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:58,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:58,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:59,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:59,142 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:59,142 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 [2018-09-26 21:16:59,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:59,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:59,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:59,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:59,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-26 21:16:59,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:16:59,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:16:59,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:16:59,235 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 4 states. [2018-09-26 21:16:59,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:59,275 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2018-09-26 21:16:59,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:16:59,276 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-26 21:16:59,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:59,276 INFO L225 Difference]: With dead ends: 13 [2018-09-26 21:16:59,277 INFO L226 Difference]: Without dead ends: 8 [2018-09-26 21:16:59,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:16:59,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-26 21:16:59,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-26 21:16:59,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-26 21:16:59,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-09-26 21:16:59,281 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2018-09-26 21:16:59,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:16:59,281 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-09-26 21:16:59,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:16:59,282 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2018-09-26 21:16:59,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-26 21:16:59,282 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:16:59,282 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-26 21:16:59,283 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:16:59,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:16:59,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1957530573, now seen corresponding path program 2 times [2018-09-26 21:16:59,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:16:59,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:16:59,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:59,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:16:59,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:16:59,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:16:59,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-26 21:16:59,365 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:16:59,365 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:16:59,381 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:16:59,410 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:16:59,410 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:16:59,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:16:59,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:16:59,500 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:16:59,500 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5] total 7 [2018-09-26 21:16:59,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:16:59,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:16:59,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:16:59,501 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 7 states. [2018-09-26 21:16:59,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:16:59,995 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2018-09-26 21:16:59,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:16:59,996 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-26 21:16:59,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:16:59,996 INFO L225 Difference]: With dead ends: 24 [2018-09-26 21:16:59,997 INFO L226 Difference]: Without dead ends: 18 [2018-09-26 21:16:59,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:16:59,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-26 21:17:00,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2018-09-26 21:17:00,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-26 21:17:00,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-09-26 21:17:00,003 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2018-09-26 21:17:00,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:00,004 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-09-26 21:17:00,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:17:00,004 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-09-26 21:17:00,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:17:00,005 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:00,005 INFO L375 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1] [2018-09-26 21:17:00,007 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:00,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:00,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1143121891, now seen corresponding path program 3 times [2018-09-26 21:17:00,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:00,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:00,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:00,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:00,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:00,119 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-26 21:17:00,120 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:00,120 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 [2018-09-26 21:17:00,130 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:17:00,150 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-26 21:17:00,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:00,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:00,158 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-26 21:17:00,179 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:00,179 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:17:00,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:17:00,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:17:00,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:17:00,180 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 6 states. [2018-09-26 21:17:00,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:00,294 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2018-09-26 21:17:00,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:17:00,295 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-09-26 21:17:00,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:00,296 INFO L225 Difference]: With dead ends: 24 [2018-09-26 21:17:00,296 INFO L226 Difference]: Without dead ends: 16 [2018-09-26 21:17:00,296 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 [2018-09-26 21:17:00,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-26 21:17:00,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-26 21:17:00,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:17:00,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-09-26 21:17:00,301 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2018-09-26 21:17:00,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:00,302 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-09-26 21:17:00,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:17:00,302 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-09-26 21:17:00,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:17:00,303 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:00,303 INFO L375 BasicCegarLoop]: trace histogram [8, 2, 2, 1, 1, 1] [2018-09-26 21:17:00,303 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:00,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:00,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1762706263, now seen corresponding path program 4 times [2018-09-26 21:17:00,304 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:00,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:00,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:00,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:00,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:00,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:00,386 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-26 21:17:00,387 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:00,387 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 [2018-09-26 21:17:00,396 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:17:00,425 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:17:00,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:00,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:00,514 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-09-26 21:17:00,535 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:00,536 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 10 [2018-09-26 21:17:00,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:17:00,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:17:00,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:17:00,537 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 10 states. [2018-09-26 21:17:01,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:01,235 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2018-09-26 21:17:01,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:17:01,236 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2018-09-26 21:17:01,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:01,237 INFO L225 Difference]: With dead ends: 40 [2018-09-26 21:17:01,237 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:17:01,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:17:01,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:17:01,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2018-09-26 21:17:01,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-26 21:17:01,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2018-09-26 21:17:01,244 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 15 [2018-09-26 21:17:01,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:01,245 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2018-09-26 21:17:01,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:17:01,245 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2018-09-26 21:17:01,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-26 21:17:01,246 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:01,246 INFO L375 BasicCegarLoop]: trace histogram [15, 3, 3, 1, 1, 1] [2018-09-26 21:17:01,246 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:01,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:01,247 INFO L82 PathProgramCache]: Analyzing trace with hash 198739950, now seen corresponding path program 5 times [2018-09-26 21:17:01,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:01,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:01,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:01,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:01,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:01,359 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-09-26 21:17:01,359 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:01,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:17:01,368 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:17:01,380 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-26 21:17:01,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:01,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-09-26 21:17:01,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:01,513 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 12 [2018-09-26 21:17:01,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:17:01,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:17:01,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:17:01,514 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 12 states. [2018-09-26 21:17:02,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:02,317 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2018-09-26 21:17:02,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:17:02,320 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2018-09-26 21:17:02,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:02,321 INFO L225 Difference]: With dead ends: 60 [2018-09-26 21:17:02,321 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:17:02,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=420, Invalid=840, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:17:02,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:17:02,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2018-09-26 21:17:02,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-26 21:17:02,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2018-09-26 21:17:02,331 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 24 [2018-09-26 21:17:02,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:02,331 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2018-09-26 21:17:02,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:17:02,332 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2018-09-26 21:17:02,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-26 21:17:02,333 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:02,333 INFO L375 BasicCegarLoop]: trace histogram [24, 4, 4, 1, 1, 1] [2018-09-26 21:17:02,333 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:02,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:02,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1597467349, now seen corresponding path program 6 times [2018-09-26 21:17:02,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:02,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:02,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:02,335 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:02,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:02,491 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 151 proven. 21 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2018-09-26 21:17:02,492 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:02,492 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:17:02,507 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:17:02,557 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-26 21:17:02,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:02,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:02,570 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 251 proven. 21 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-09-26 21:17:02,596 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:02,596 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:17:02,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:17:02,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:17:02,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:17:02,597 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 9 states. [2018-09-26 21:17:02,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:02,629 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2018-09-26 21:17:02,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:17:02,632 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2018-09-26 21:17:02,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:02,633 INFO L225 Difference]: With dead ends: 67 [2018-09-26 21:17:02,633 INFO L226 Difference]: Without dead ends: 40 [2018-09-26 21:17:02,633 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 [2018-09-26 21:17:02,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-26 21:17:02,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-26 21:17:02,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-26 21:17:02,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2018-09-26 21:17:02,642 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 35 [2018-09-26 21:17:02,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:02,643 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2018-09-26 21:17:02,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:17:02,643 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2018-09-26 21:17:02,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-26 21:17:02,644 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:02,644 INFO L375 BasicCegarLoop]: trace histogram [28, 4, 4, 1, 1, 1] [2018-09-26 21:17:02,644 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:02,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:02,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1404785213, now seen corresponding path program 7 times [2018-09-26 21:17:02,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:02,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:02,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:02,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:02,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:02,836 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 394 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-09-26 21:17:02,837 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:02,837 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 [2018-09-26 21:17:02,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:02,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:02,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:03,053 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 196 proven. 28 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2018-09-26 21:17:03,073 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:03,074 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 15 [2018-09-26 21:17:03,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:17:03,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:17:03,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:17:03,075 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 15 states. [2018-09-26 21:17:04,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:04,238 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2018-09-26 21:17:04,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:17:04,240 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2018-09-26 21:17:04,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:04,240 INFO L225 Difference]: With dead ends: 93 [2018-09-26 21:17:04,241 INFO L226 Difference]: Without dead ends: 63 [2018-09-26 21:17:04,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=945, Invalid=2025, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:17:04,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-26 21:17:04,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2018-09-26 21:17:04,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-26 21:17:04,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2018-09-26 21:17:04,256 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 39 [2018-09-26 21:17:04,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:04,256 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2018-09-26 21:17:04,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:17:04,256 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2018-09-26 21:17:04,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-26 21:17:04,258 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:04,258 INFO L375 BasicCegarLoop]: trace histogram [40, 5, 5, 1, 1, 1] [2018-09-26 21:17:04,258 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:04,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:04,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1154943019, now seen corresponding path program 8 times [2018-09-26 21:17:04,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:04,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:04,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:04,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:04,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:04,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 0 proven. 825 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-09-26 21:17:04,403 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:04,403 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 [2018-09-26 21:17:04,438 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:17:04,493 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:17:04,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:04,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:04,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 329 proven. 36 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2018-09-26 21:17:04,926 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:04,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 17 [2018-09-26 21:17:04,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:17:04,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:17:04,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:17:04,927 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 17 states. [2018-09-26 21:17:06,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:06,325 INFO L93 Difference]: Finished difference Result 123 states and 142 transitions. [2018-09-26 21:17:06,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-26 21:17:06,325 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2018-09-26 21:17:06,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:06,326 INFO L225 Difference]: With dead ends: 123 [2018-09-26 21:17:06,326 INFO L226 Difference]: Without dead ends: 80 [2018-09-26 21:17:06,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1476 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1540, Invalid=3430, Unknown=0, NotChecked=0, Total=4970 [2018-09-26 21:17:06,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-26 21:17:06,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2018-09-26 21:17:06,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-26 21:17:06,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2018-09-26 21:17:06,343 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 53 [2018-09-26 21:17:06,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:06,344 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2018-09-26 21:17:06,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:17:06,344 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2018-09-26 21:17:06,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-26 21:17:06,346 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:06,346 INFO L375 BasicCegarLoop]: trace histogram [54, 6, 6, 1, 1, 1] [2018-09-26 21:17:06,346 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:06,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:06,347 INFO L82 PathProgramCache]: Analyzing trace with hash -2076506525, now seen corresponding path program 9 times [2018-09-26 21:17:06,347 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:06,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:06,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:06,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:06,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2018-09-26 21:17:06,487 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:06,487 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 [2018-09-26 21:17:06,497 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:17:06,528 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-26 21:17:06,529 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:06,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:06,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 506 proven. 45 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2018-09-26 21:17:06,665 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:06,665 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 19 [2018-09-26 21:17:06,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-26 21:17:06,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-26 21:17:06,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:17:06,666 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 19 states. [2018-09-26 21:17:10,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:10,714 INFO L93 Difference]: Finished difference Result 157 states and 179 transitions. [2018-09-26 21:17:10,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-26 21:17:10,715 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 69 [2018-09-26 21:17:10,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:10,716 INFO L225 Difference]: With dead ends: 157 [2018-09-26 21:17:10,716 INFO L226 Difference]: Without dead ends: 99 [2018-09-26 21:17:10,719 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2475 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2376, Invalid=5456, Unknown=0, NotChecked=0, Total=7832 [2018-09-26 21:17:10,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-26 21:17:10,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 88. [2018-09-26 21:17:10,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-26 21:17:10,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2018-09-26 21:17:10,737 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 69 [2018-09-26 21:17:10,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:10,738 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2018-09-26 21:17:10,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-26 21:17:10,738 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2018-09-26 21:17:10,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-26 21:17:10,740 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:10,740 INFO L375 BasicCegarLoop]: trace histogram [70, 7, 7, 1, 1, 1] [2018-09-26 21:17:10,741 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:10,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:10,741 INFO L82 PathProgramCache]: Analyzing trace with hash -815084279, now seen corresponding path program 10 times [2018-09-26 21:17:10,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:10,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:10,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:10,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:10,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:10,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:11,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2954 backedges. 0 proven. 2569 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-09-26 21:17:11,157 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:11,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:17:11,176 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:17:11,235 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:17:11,236 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:11,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:11,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2954 backedges. 0 proven. 2569 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-09-26 21:17:11,287 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:11,287 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:17:11,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:17:11,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:17:11,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:17:11,288 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 10 states. [2018-09-26 21:17:11,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:11,423 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2018-09-26 21:17:11,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:17:11,424 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 87 [2018-09-26 21:17:11,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:11,425 INFO L225 Difference]: With dead ends: 113 [2018-09-26 21:17:11,425 INFO L226 Difference]: Without dead ends: 111 [2018-09-26 21:17:11,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:17:11,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-26 21:17:11,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 100. [2018-09-26 21:17:11,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-26 21:17:11,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2018-09-26 21:17:11,444 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 87 [2018-09-26 21:17:11,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:11,445 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2018-09-26 21:17:11,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:17:11,445 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2018-09-26 21:17:11,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-26 21:17:11,447 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:11,447 INFO L375 BasicCegarLoop]: trace histogram [80, 8, 8, 1, 1, 1] [2018-09-26 21:17:11,447 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:11,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:11,448 INFO L82 PathProgramCache]: Analyzing trace with hash 558484307, now seen corresponding path program 11 times [2018-09-26 21:17:11,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:11,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:11,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:11,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:11,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:11,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:11,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3864 backedges. 0 proven. 3424 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-09-26 21:17:11,695 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:11,695 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 [2018-09-26 21:17:11,705 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:17:12,035 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-26 21:17:12,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:12,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:12,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3864 backedges. 0 proven. 3424 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-09-26 21:17:12,089 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:12,090 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:17:12,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:17:12,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:17:12,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:17:12,091 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand 11 states. [2018-09-26 21:17:12,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:12,230 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2018-09-26 21:17:12,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:17:12,231 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 99 [2018-09-26 21:17:12,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:12,232 INFO L225 Difference]: With dead ends: 125 [2018-09-26 21:17:12,232 INFO L226 Difference]: Without dead ends: 123 [2018-09-26 21:17:12,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:17:12,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-26 21:17:12,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 112. [2018-09-26 21:17:12,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-26 21:17:12,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 121 transitions. [2018-09-26 21:17:12,255 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 121 transitions. Word has length 99 [2018-09-26 21:17:12,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:12,255 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 121 transitions. [2018-09-26 21:17:12,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:17:12,255 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 121 transitions. [2018-09-26 21:17:12,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-26 21:17:12,257 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:12,257 INFO L375 BasicCegarLoop]: trace histogram [90, 9, 9, 1, 1, 1] [2018-09-26 21:17:12,257 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:12,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:12,258 INFO L82 PathProgramCache]: Analyzing trace with hash -2005161315, now seen corresponding path program 12 times [2018-09-26 21:17:12,258 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:12,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:12,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:12,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:12,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:12,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4896 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-09-26 21:17:12,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:12,646 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 [2018-09-26 21:17:12,655 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:17:12,762 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2018-09-26 21:17:12,762 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:12,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:12,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4896 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-09-26 21:17:12,813 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:12,813 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-26 21:17:12,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:17:12,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:17:12,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:17:12,814 INFO L87 Difference]: Start difference. First operand 112 states and 121 transitions. Second operand 12 states. [2018-09-26 21:17:13,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:13,088 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2018-09-26 21:17:13,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:17:13,089 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 111 [2018-09-26 21:17:13,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:13,090 INFO L225 Difference]: With dead ends: 137 [2018-09-26 21:17:13,090 INFO L226 Difference]: Without dead ends: 135 [2018-09-26 21:17:13,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:17:13,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-26 21:17:13,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 124. [2018-09-26 21:17:13,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-26 21:17:13,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2018-09-26 21:17:13,131 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 111 [2018-09-26 21:17:13,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:13,131 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2018-09-26 21:17:13,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:17:13,131 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2018-09-26 21:17:13,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-26 21:17:13,133 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:13,133 INFO L375 BasicCegarLoop]: trace histogram [100, 10, 10, 1, 1, 1] [2018-09-26 21:17:13,140 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:13,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:13,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1028199705, now seen corresponding path program 13 times [2018-09-26 21:17:13,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:13,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:13,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:13,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:13,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:13,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-09-26 21:17:13,406 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:13,406 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 [2018-09-26 21:17:13,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:13,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:13,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-09-26 21:17:13,547 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:13,547 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-26 21:17:13,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:17:13,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:17:13,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:17:13,548 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand 13 states. [2018-09-26 21:17:13,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:13,850 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2018-09-26 21:17:13,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:17:13,850 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 123 [2018-09-26 21:17:13,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:13,851 INFO L225 Difference]: With dead ends: 149 [2018-09-26 21:17:13,851 INFO L226 Difference]: Without dead ends: 147 [2018-09-26 21:17:13,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:17:13,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-26 21:17:13,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 136. [2018-09-26 21:17:13,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-26 21:17:13,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 147 transitions. [2018-09-26 21:17:13,875 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 147 transitions. Word has length 123 [2018-09-26 21:17:13,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:13,875 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 147 transitions. [2018-09-26 21:17:13,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:17:13,875 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 147 transitions. [2018-09-26 21:17:13,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-26 21:17:13,877 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:13,877 INFO L375 BasicCegarLoop]: trace histogram [110, 11, 11, 1, 1, 1] [2018-09-26 21:17:13,877 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:13,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:13,878 INFO L82 PathProgramCache]: Analyzing trace with hash 804391985, now seen corresponding path program 14 times [2018-09-26 21:17:13,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:13,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:13,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:13,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:13,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:13,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7326 backedges. 0 proven. 6721 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2018-09-26 21:17:14,144 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:14,144 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:17:14,157 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:17:14,244 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:17:14,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:14,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7326 backedges. 0 proven. 6721 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2018-09-26 21:17:14,317 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:14,317 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-26 21:17:14,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:17:14,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:17:14,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:17:14,318 INFO L87 Difference]: Start difference. First operand 136 states and 147 transitions. Second operand 14 states. [2018-09-26 21:17:14,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:14,430 INFO L93 Difference]: Finished difference Result 161 states and 174 transitions. [2018-09-26 21:17:14,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:17:14,431 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 135 [2018-09-26 21:17:14,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:14,432 INFO L225 Difference]: With dead ends: 161 [2018-09-26 21:17:14,432 INFO L226 Difference]: Without dead ends: 159 [2018-09-26 21:17:14,432 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 [2018-09-26 21:17:14,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-26 21:17:14,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 148. [2018-09-26 21:17:14,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-26 21:17:14,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 160 transitions. [2018-09-26 21:17:14,454 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 160 transitions. Word has length 135 [2018-09-26 21:17:14,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:14,455 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 160 transitions. [2018-09-26 21:17:14,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:17:14,455 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 160 transitions. [2018-09-26 21:17:14,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-26 21:17:14,456 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:14,456 INFO L375 BasicCegarLoop]: trace histogram [120, 12, 12, 1, 1, 1] [2018-09-26 21:17:14,456 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:14,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:14,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1919127163, now seen corresponding path program 15 times [2018-09-26 21:17:14,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:14,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:14,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:14,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:14,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8724 backedges. 0 proven. 8064 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-09-26 21:17:14,767 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:14,767 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:17:14,778 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:17:14,916 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 73 check-sat command(s) [2018-09-26 21:17:14,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:14,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:14,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8724 backedges. 0 proven. 8064 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-09-26 21:17:14,969 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:14,969 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-26 21:17:14,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:17:14,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:17:14,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:17:14,970 INFO L87 Difference]: Start difference. First operand 148 states and 160 transitions. Second operand 15 states. [2018-09-26 21:17:15,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:15,106 INFO L93 Difference]: Finished difference Result 173 states and 187 transitions. [2018-09-26 21:17:15,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:17:15,107 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 147 [2018-09-26 21:17:15,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:15,109 INFO L225 Difference]: With dead ends: 173 [2018-09-26 21:17:15,109 INFO L226 Difference]: Without dead ends: 171 [2018-09-26 21:17:15,109 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 [2018-09-26 21:17:15,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-26 21:17:15,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 160. [2018-09-26 21:17:15,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-26 21:17:15,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2018-09-26 21:17:15,148 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 147 [2018-09-26 21:17:15,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:15,148 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2018-09-26 21:17:15,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:17:15,148 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2018-09-26 21:17:15,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-09-26 21:17:15,150 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:15,150 INFO L375 BasicCegarLoop]: trace histogram [130, 13, 13, 1, 1, 1] [2018-09-26 21:17:15,151 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:15,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:15,151 INFO L82 PathProgramCache]: Analyzing trace with hash 243397061, now seen corresponding path program 16 times [2018-09-26 21:17:15,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:15,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:15,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:15,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:15,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:15,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10244 backedges. 0 proven. 9529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2018-09-26 21:17:15,484 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:15,484 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:17:15,492 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:17:15,590 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:17:15,591 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:15,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:15,628 INFO L134 CoverageAnalysis]: Checked inductivity of 10244 backedges. 0 proven. 9529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2018-09-26 21:17:15,658 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:15,658 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-26 21:17:15,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:17:15,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:17:15,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:17:15,659 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand 16 states. [2018-09-26 21:17:15,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:15,850 INFO L93 Difference]: Finished difference Result 185 states and 200 transitions. [2018-09-26 21:17:15,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:17:15,850 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 159 [2018-09-26 21:17:15,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:15,852 INFO L225 Difference]: With dead ends: 185 [2018-09-26 21:17:15,852 INFO L226 Difference]: Without dead ends: 183 [2018-09-26 21:17:15,853 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 [2018-09-26 21:17:15,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-26 21:17:15,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 172. [2018-09-26 21:17:15,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-09-26 21:17:15,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 186 transitions. [2018-09-26 21:17:15,881 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 186 transitions. Word has length 159 [2018-09-26 21:17:15,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:15,882 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 186 transitions. [2018-09-26 21:17:15,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:17:15,882 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 186 transitions. [2018-09-26 21:17:15,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-09-26 21:17:15,883 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:15,884 INFO L375 BasicCegarLoop]: trace histogram [140, 14, 14, 1, 1, 1] [2018-09-26 21:17:15,884 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:15,884 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:15,884 INFO L82 PathProgramCache]: Analyzing trace with hash 184792591, now seen corresponding path program 17 times [2018-09-26 21:17:15,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:15,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:15,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:15,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:15,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:15,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:16,194 INFO L134 CoverageAnalysis]: Checked inductivity of 11886 backedges. 0 proven. 11116 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-09-26 21:17:16,195 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:16,195 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:17:16,210 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:17:16,449 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2018-09-26 21:17:16,449 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:16,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 11886 backedges. 0 proven. 11116 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-09-26 21:17:16,532 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:16,532 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-26 21:17:16,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:17:16,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:17:16,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:17:16,534 INFO L87 Difference]: Start difference. First operand 172 states and 186 transitions. Second operand 17 states. [2018-09-26 21:17:16,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:16,691 INFO L93 Difference]: Finished difference Result 197 states and 213 transitions. [2018-09-26 21:17:16,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:17:16,691 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 171 [2018-09-26 21:17:16,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:16,692 INFO L225 Difference]: With dead ends: 197 [2018-09-26 21:17:16,692 INFO L226 Difference]: Without dead ends: 195 [2018-09-26 21:17:16,693 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 [2018-09-26 21:17:16,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-26 21:17:16,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 184. [2018-09-26 21:17:16,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-09-26 21:17:16,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 199 transitions. [2018-09-26 21:17:16,725 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 199 transitions. Word has length 171 [2018-09-26 21:17:16,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:16,726 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 199 transitions. [2018-09-26 21:17:16,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:17:16,726 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 199 transitions. [2018-09-26 21:17:16,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-09-26 21:17:16,727 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:16,727 INFO L375 BasicCegarLoop]: trace histogram [150, 15, 15, 1, 1, 1] [2018-09-26 21:17:16,727 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:16,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:16,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1864410279, now seen corresponding path program 18 times [2018-09-26 21:17:16,728 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:16,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:16,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:16,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:16,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:16,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:17,739 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 0 proven. 12825 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2018-09-26 21:17:17,739 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:17,739 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 [2018-09-26 21:17:17,746 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:17:18,110 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 86 check-sat command(s) [2018-09-26 21:17:18,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:18,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:18,150 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 0 proven. 12825 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2018-09-26 21:17:18,172 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:18,172 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-26 21:17:18,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:17:18,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:17:18,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:17:18,173 INFO L87 Difference]: Start difference. First operand 184 states and 199 transitions. Second operand 18 states. [2018-09-26 21:17:18,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:18,282 INFO L93 Difference]: Finished difference Result 209 states and 226 transitions. [2018-09-26 21:17:18,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:17:18,283 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 183 [2018-09-26 21:17:18,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:18,284 INFO L225 Difference]: With dead ends: 209 [2018-09-26 21:17:18,284 INFO L226 Difference]: Without dead ends: 207 [2018-09-26 21:17:18,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:17:18,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-26 21:17:18,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 196. [2018-09-26 21:17:18,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-09-26 21:17:18,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 212 transitions. [2018-09-26 21:17:18,322 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 212 transitions. Word has length 183 [2018-09-26 21:17:18,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:18,322 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 212 transitions. [2018-09-26 21:17:18,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:17:18,322 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 212 transitions. [2018-09-26 21:17:18,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-09-26 21:17:18,323 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:18,324 INFO L375 BasicCegarLoop]: trace histogram [160, 16, 16, 1, 1, 1] [2018-09-26 21:17:18,324 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:18,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:18,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1957994077, now seen corresponding path program 19 times [2018-09-26 21:17:18,324 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:18,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:18,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:18,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:18,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 15536 backedges. 0 proven. 14656 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-09-26 21:17:18,623 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:18,623 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 [2018-09-26 21:17:18,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:18,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 15536 backedges. 0 proven. 14656 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-09-26 21:17:18,827 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:18,828 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-26 21:17:18,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-26 21:17:18,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-26 21:17:18,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:17:18,829 INFO L87 Difference]: Start difference. First operand 196 states and 212 transitions. Second operand 19 states. [2018-09-26 21:17:18,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:18,977 INFO L93 Difference]: Finished difference Result 221 states and 239 transitions. [2018-09-26 21:17:18,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:17:18,979 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 195 [2018-09-26 21:17:18,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:18,980 INFO L225 Difference]: With dead ends: 221 [2018-09-26 21:17:18,980 INFO L226 Difference]: Without dead ends: 219 [2018-09-26 21:17:18,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:17:18,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-26 21:17:19,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 208. [2018-09-26 21:17:19,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-09-26 21:17:19,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 225 transitions. [2018-09-26 21:17:19,019 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 225 transitions. Word has length 195 [2018-09-26 21:17:19,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:19,019 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 225 transitions. [2018-09-26 21:17:19,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-26 21:17:19,019 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 225 transitions. [2018-09-26 21:17:19,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-09-26 21:17:19,020 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:19,021 INFO L375 BasicCegarLoop]: trace histogram [170, 17, 17, 1, 1, 1] [2018-09-26 21:17:19,021 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:19,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:19,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1203652845, now seen corresponding path program 20 times [2018-09-26 21:17:19,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:19,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:19,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:19,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:19,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:19,595 INFO L134 CoverageAnalysis]: Checked inductivity of 17544 backedges. 0 proven. 16609 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2018-09-26 21:17:19,596 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:19,596 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 [2018-09-26 21:17:19,604 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:17:19,713 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:17:19,713 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:19,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:19,758 INFO L134 CoverageAnalysis]: Checked inductivity of 17544 backedges. 0 proven. 16609 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2018-09-26 21:17:19,779 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:19,780 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-26 21:17:19,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:17:19,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:17:19,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:17:19,781 INFO L87 Difference]: Start difference. First operand 208 states and 225 transitions. Second operand 20 states. [2018-09-26 21:17:19,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:19,915 INFO L93 Difference]: Finished difference Result 233 states and 252 transitions. [2018-09-26 21:17:19,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:17:19,916 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 207 [2018-09-26 21:17:19,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:19,918 INFO L225 Difference]: With dead ends: 233 [2018-09-26 21:17:19,918 INFO L226 Difference]: Without dead ends: 231 [2018-09-26 21:17:19,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:17:19,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-09-26 21:17:19,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 220. [2018-09-26 21:17:19,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-09-26 21:17:19,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 238 transitions. [2018-09-26 21:17:19,962 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 238 transitions. Word has length 207 [2018-09-26 21:17:19,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:19,962 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 238 transitions. [2018-09-26 21:17:19,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:17:19,962 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 238 transitions. [2018-09-26 21:17:19,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-09-26 21:17:19,963 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:19,964 INFO L375 BasicCegarLoop]: trace histogram [180, 18, 18, 1, 1, 1] [2018-09-26 21:17:19,964 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:19,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:19,964 INFO L82 PathProgramCache]: Analyzing trace with hash 367956279, now seen corresponding path program 21 times [2018-09-26 21:17:19,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:19,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:19,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:19,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:19,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:20,314 INFO L134 CoverageAnalysis]: Checked inductivity of 19674 backedges. 0 proven. 18684 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-09-26 21:17:20,314 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:20,314 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 [2018-09-26 21:17:20,323 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:17:20,566 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 109 check-sat command(s) [2018-09-26 21:17:20,566 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:20,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:20,631 INFO L134 CoverageAnalysis]: Checked inductivity of 19674 backedges. 0 proven. 18684 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-09-26 21:17:20,661 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:20,661 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-26 21:17:20,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-26 21:17:20,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-26 21:17:20,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:17:20,662 INFO L87 Difference]: Start difference. First operand 220 states and 238 transitions. Second operand 21 states. [2018-09-26 21:17:20,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:20,801 INFO L93 Difference]: Finished difference Result 245 states and 265 transitions. [2018-09-26 21:17:20,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:17:20,802 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 219 [2018-09-26 21:17:20,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:20,803 INFO L225 Difference]: With dead ends: 245 [2018-09-26 21:17:20,803 INFO L226 Difference]: Without dead ends: 243 [2018-09-26 21:17:20,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:17:20,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-26 21:17:20,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 232. [2018-09-26 21:17:20,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-09-26 21:17:20,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 251 transitions. [2018-09-26 21:17:20,852 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 251 transitions. Word has length 219 [2018-09-26 21:17:20,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:20,852 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 251 transitions. [2018-09-26 21:17:20,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-26 21:17:20,853 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 251 transitions. [2018-09-26 21:17:20,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-09-26 21:17:20,854 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:20,854 INFO L375 BasicCegarLoop]: trace histogram [190, 19, 19, 1, 1, 1] [2018-09-26 21:17:20,854 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:20,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:20,854 INFO L82 PathProgramCache]: Analyzing trace with hash -405620095, now seen corresponding path program 22 times [2018-09-26 21:17:20,855 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:20,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:20,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:20,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:20,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:20,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:21,271 INFO L134 CoverageAnalysis]: Checked inductivity of 21926 backedges. 0 proven. 20881 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2018-09-26 21:17:21,271 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:21,271 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 [2018-09-26 21:17:21,280 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:17:21,398 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:17:21,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:21,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:21,479 INFO L134 CoverageAnalysis]: Checked inductivity of 21926 backedges. 0 proven. 20881 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2018-09-26 21:17:21,503 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:21,503 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-26 21:17:21,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:17:21,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:17:21,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:17:21,505 INFO L87 Difference]: Start difference. First operand 232 states and 251 transitions. Second operand 22 states. [2018-09-26 21:17:21,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:21,680 INFO L93 Difference]: Finished difference Result 257 states and 278 transitions. [2018-09-26 21:17:21,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:17:21,687 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 231 [2018-09-26 21:17:21,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:21,688 INFO L225 Difference]: With dead ends: 257 [2018-09-26 21:17:21,688 INFO L226 Difference]: Without dead ends: 255 [2018-09-26 21:17:21,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:17:21,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-09-26 21:17:21,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 244. [2018-09-26 21:17:21,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-09-26 21:17:21,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 264 transitions. [2018-09-26 21:17:21,761 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 264 transitions. Word has length 231 [2018-09-26 21:17:21,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:21,762 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 264 transitions. [2018-09-26 21:17:21,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:17:21,762 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 264 transitions. [2018-09-26 21:17:21,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-09-26 21:17:21,763 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:21,763 INFO L375 BasicCegarLoop]: trace histogram [200, 20, 20, 1, 1, 1] [2018-09-26 21:17:21,763 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:21,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:21,764 INFO L82 PathProgramCache]: Analyzing trace with hash -241089333, now seen corresponding path program 23 times [2018-09-26 21:17:21,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:21,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:21,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:21,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:21,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:21,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:23,190 INFO L134 CoverageAnalysis]: Checked inductivity of 24300 backedges. 0 proven. 23200 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2018-09-26 21:17:23,190 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:23,190 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:17:23,197 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:17:23,560 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 121 check-sat command(s) [2018-09-26 21:17:23,560 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:23,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:23,621 INFO L134 CoverageAnalysis]: Checked inductivity of 24300 backedges. 0 proven. 23200 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2018-09-26 21:17:23,641 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:23,642 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-26 21:17:23,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:17:23,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:17:23,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:17:23,643 INFO L87 Difference]: Start difference. First operand 244 states and 264 transitions. Second operand 23 states. [2018-09-26 21:17:23,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:23,791 INFO L93 Difference]: Finished difference Result 269 states and 291 transitions. [2018-09-26 21:17:23,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:17:23,792 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 243 [2018-09-26 21:17:23,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:23,793 INFO L225 Difference]: With dead ends: 269 [2018-09-26 21:17:23,794 INFO L226 Difference]: Without dead ends: 267 [2018-09-26 21:17:23,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:17:23,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-09-26 21:17:23,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 256. [2018-09-26 21:17:23,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-09-26 21:17:23,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 277 transitions. [2018-09-26 21:17:23,850 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 277 transitions. Word has length 243 [2018-09-26 21:17:23,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:23,851 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 277 transitions. [2018-09-26 21:17:23,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:17:23,851 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 277 transitions. [2018-09-26 21:17:23,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-09-26 21:17:23,852 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:23,853 INFO L375 BasicCegarLoop]: trace histogram [210, 21, 21, 1, 1, 1] [2018-09-26 21:17:23,853 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:23,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:23,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1238413333, now seen corresponding path program 24 times [2018-09-26 21:17:23,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:23,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:23,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:23,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:23,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:23,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:24,743 INFO L134 CoverageAnalysis]: Checked inductivity of 26796 backedges. 0 proven. 25641 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2018-09-26 21:17:24,743 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:24,744 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 [2018-09-26 21:17:24,750 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:17:25,093 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 123 check-sat command(s) [2018-09-26 21:17:25,094 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:25,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:25,154 INFO L134 CoverageAnalysis]: Checked inductivity of 26796 backedges. 0 proven. 25641 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2018-09-26 21:17:25,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:25,175 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-26 21:17:25,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:17:25,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:17:25,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:17:25,177 INFO L87 Difference]: Start difference. First operand 256 states and 277 transitions. Second operand 24 states. [2018-09-26 21:17:25,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:25,405 INFO L93 Difference]: Finished difference Result 281 states and 304 transitions. [2018-09-26 21:17:25,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:17:25,405 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 255 [2018-09-26 21:17:25,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:25,406 INFO L225 Difference]: With dead ends: 281 [2018-09-26 21:17:25,406 INFO L226 Difference]: Without dead ends: 279 [2018-09-26 21:17:25,407 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 [2018-09-26 21:17:25,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-09-26 21:17:25,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 268. [2018-09-26 21:17:25,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-09-26 21:17:25,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 290 transitions. [2018-09-26 21:17:25,494 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 290 transitions. Word has length 255 [2018-09-26 21:17:25,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:25,494 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 290 transitions. [2018-09-26 21:17:25,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:17:25,495 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 290 transitions. [2018-09-26 21:17:25,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-09-26 21:17:25,496 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:25,496 INFO L375 BasicCegarLoop]: trace histogram [220, 22, 22, 1, 1, 1] [2018-09-26 21:17:25,496 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:25,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:25,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1994949537, now seen corresponding path program 25 times [2018-09-26 21:17:25,497 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:25,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:25,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:25,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:25,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:25,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:26,286 INFO L134 CoverageAnalysis]: Checked inductivity of 29414 backedges. 0 proven. 28204 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2018-09-26 21:17:26,286 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:26,286 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 [2018-09-26 21:17:26,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:26,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:26,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:26,520 INFO L134 CoverageAnalysis]: Checked inductivity of 29414 backedges. 0 proven. 28204 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2018-09-26 21:17:26,551 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:26,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-26 21:17:26,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-26 21:17:26,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-26 21:17:26,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:17:26,553 INFO L87 Difference]: Start difference. First operand 268 states and 290 transitions. Second operand 25 states. [2018-09-26 21:17:27,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:27,489 INFO L93 Difference]: Finished difference Result 293 states and 317 transitions. [2018-09-26 21:17:27,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:17:27,490 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 267 [2018-09-26 21:17:27,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:27,492 INFO L225 Difference]: With dead ends: 293 [2018-09-26 21:17:27,492 INFO L226 Difference]: Without dead ends: 291 [2018-09-26 21:17:27,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:17:27,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-09-26 21:17:27,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 280. [2018-09-26 21:17:27,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-09-26 21:17:27,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 303 transitions. [2018-09-26 21:17:27,585 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 303 transitions. Word has length 267 [2018-09-26 21:17:27,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:27,585 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 303 transitions. [2018-09-26 21:17:27,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-26 21:17:27,585 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 303 transitions. [2018-09-26 21:17:27,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-09-26 21:17:27,587 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:27,587 INFO L375 BasicCegarLoop]: trace histogram [230, 23, 23, 1, 1, 1] [2018-09-26 21:17:27,588 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:27,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:27,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1785473449, now seen corresponding path program 26 times [2018-09-26 21:17:27,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:27,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:27,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:27,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:27,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:28,072 INFO L134 CoverageAnalysis]: Checked inductivity of 32154 backedges. 0 proven. 30889 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2018-09-26 21:17:28,072 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:28,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:17:28,081 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:17:28,235 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:17:28,235 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:28,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:28,318 INFO L134 CoverageAnalysis]: Checked inductivity of 32154 backedges. 0 proven. 30889 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2018-09-26 21:17:28,339 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:28,339 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-26 21:17:28,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:17:28,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:17:28,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:17:28,340 INFO L87 Difference]: Start difference. First operand 280 states and 303 transitions. Second operand 26 states. [2018-09-26 21:17:28,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:28,543 INFO L93 Difference]: Finished difference Result 305 states and 330 transitions. [2018-09-26 21:17:28,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:17:28,544 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 279 [2018-09-26 21:17:28,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:28,545 INFO L225 Difference]: With dead ends: 305 [2018-09-26 21:17:28,546 INFO L226 Difference]: Without dead ends: 303 [2018-09-26 21:17:28,546 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:17:28,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-09-26 21:17:28,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 292. [2018-09-26 21:17:28,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-09-26 21:17:28,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 316 transitions. [2018-09-26 21:17:28,625 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 316 transitions. Word has length 279 [2018-09-26 21:17:28,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:28,625 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 316 transitions. [2018-09-26 21:17:28,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:17:28,626 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 316 transitions. [2018-09-26 21:17:28,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-09-26 21:17:28,627 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:28,627 INFO L375 BasicCegarLoop]: trace histogram [240, 24, 24, 1, 1, 1] [2018-09-26 21:17:28,627 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:28,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:28,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1795504115, now seen corresponding path program 27 times [2018-09-26 21:17:28,627 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:28,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:28,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:28,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:28,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:29,985 INFO L134 CoverageAnalysis]: Checked inductivity of 35016 backedges. 0 proven. 33696 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-09-26 21:17:29,986 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:29,986 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:17:29,994 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:17:30,681 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 145 check-sat command(s) [2018-09-26 21:17:30,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:30,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:30,808 INFO L134 CoverageAnalysis]: Checked inductivity of 35016 backedges. 0 proven. 33696 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-09-26 21:17:30,829 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:30,829 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-26 21:17:30,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-26 21:17:30,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-26 21:17:30,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:17:30,830 INFO L87 Difference]: Start difference. First operand 292 states and 316 transitions. Second operand 27 states. [2018-09-26 21:17:31,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:31,044 INFO L93 Difference]: Finished difference Result 317 states and 343 transitions. [2018-09-26 21:17:31,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:17:31,045 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 291 [2018-09-26 21:17:31,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:31,046 INFO L225 Difference]: With dead ends: 317 [2018-09-26 21:17:31,046 INFO L226 Difference]: Without dead ends: 315 [2018-09-26 21:17:31,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:17:31,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-09-26 21:17:31,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 304. [2018-09-26 21:17:31,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-09-26 21:17:31,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 329 transitions. [2018-09-26 21:17:31,121 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 329 transitions. Word has length 291 [2018-09-26 21:17:31,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:31,121 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 329 transitions. [2018-09-26 21:17:31,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-26 21:17:31,122 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 329 transitions. [2018-09-26 21:17:31,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-09-26 21:17:31,123 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:31,123 INFO L375 BasicCegarLoop]: trace histogram [250, 25, 25, 1, 1, 1] [2018-09-26 21:17:31,124 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:31,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:31,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1784227645, now seen corresponding path program 28 times [2018-09-26 21:17:31,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:31,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:31,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:31,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:31,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:31,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:31,959 INFO L134 CoverageAnalysis]: Checked inductivity of 38000 backedges. 0 proven. 36625 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2018-09-26 21:17:31,960 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:31,960 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 [2018-09-26 21:17:31,969 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:17:32,127 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:17:32,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:32,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:32,234 INFO L134 CoverageAnalysis]: Checked inductivity of 38000 backedges. 0 proven. 36625 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2018-09-26 21:17:32,265 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:32,265 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-26 21:17:32,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:17:32,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:17:32,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:17:32,266 INFO L87 Difference]: Start difference. First operand 304 states and 329 transitions. Second operand 28 states. [2018-09-26 21:17:32,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:32,498 INFO L93 Difference]: Finished difference Result 329 states and 356 transitions. [2018-09-26 21:17:32,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:17:32,499 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 303 [2018-09-26 21:17:32,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:32,500 INFO L225 Difference]: With dead ends: 329 [2018-09-26 21:17:32,500 INFO L226 Difference]: Without dead ends: 327 [2018-09-26 21:17:32,501 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 [2018-09-26 21:17:32,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-09-26 21:17:32,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 316. [2018-09-26 21:17:32,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-09-26 21:17:32,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 342 transitions. [2018-09-26 21:17:32,598 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 342 transitions. Word has length 303 [2018-09-26 21:17:32,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:32,598 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 342 transitions. [2018-09-26 21:17:32,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:17:32,599 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 342 transitions. [2018-09-26 21:17:32,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-09-26 21:17:32,600 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:32,600 INFO L375 BasicCegarLoop]: trace histogram [260, 26, 26, 1, 1, 1] [2018-09-26 21:17:32,601 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:32,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:32,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1243510663, now seen corresponding path program 29 times [2018-09-26 21:17:32,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:32,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:32,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:32,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:32,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:32,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:34,011 INFO L134 CoverageAnalysis]: Checked inductivity of 41106 backedges. 0 proven. 39676 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-09-26 21:17:34,011 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:34,012 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 [2018-09-26 21:17:34,019 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:17:34,438 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 157 check-sat command(s) [2018-09-26 21:17:34,438 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:34,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:34,563 INFO L134 CoverageAnalysis]: Checked inductivity of 41106 backedges. 0 proven. 39676 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-09-26 21:17:34,583 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:34,584 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-26 21:17:34,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:17:34,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:17:34,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:17:34,585 INFO L87 Difference]: Start difference. First operand 316 states and 342 transitions. Second operand 29 states. [2018-09-26 21:17:34,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:34,804 INFO L93 Difference]: Finished difference Result 341 states and 369 transitions. [2018-09-26 21:17:34,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:17:34,804 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 315 [2018-09-26 21:17:34,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:34,806 INFO L225 Difference]: With dead ends: 341 [2018-09-26 21:17:34,806 INFO L226 Difference]: Without dead ends: 339 [2018-09-26 21:17:34,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:17:34,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-09-26 21:17:34,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 328. [2018-09-26 21:17:34,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-09-26 21:17:34,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 355 transitions. [2018-09-26 21:17:34,920 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 355 transitions. Word has length 315 [2018-09-26 21:17:34,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:34,920 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 355 transitions. [2018-09-26 21:17:34,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:17:34,920 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 355 transitions. [2018-09-26 21:17:34,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-09-26 21:17:34,921 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:34,922 INFO L375 BasicCegarLoop]: trace histogram [270, 27, 27, 1, 1, 1] [2018-09-26 21:17:34,922 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:34,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:34,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1907644207, now seen corresponding path program 30 times [2018-09-26 21:17:34,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:34,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:34,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:34,923 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:34,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:34,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:35,724 INFO L134 CoverageAnalysis]: Checked inductivity of 44334 backedges. 0 proven. 42849 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2018-09-26 21:17:35,725 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:35,725 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 [2018-09-26 21:17:35,732 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:17:36,169 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 158 check-sat command(s) [2018-09-26 21:17:36,169 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:36,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:36,280 INFO L134 CoverageAnalysis]: Checked inductivity of 44334 backedges. 0 proven. 42849 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2018-09-26 21:17:36,310 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:36,310 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-26 21:17:36,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:17:36,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:17:36,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:17:36,312 INFO L87 Difference]: Start difference. First operand 328 states and 355 transitions. Second operand 30 states. [2018-09-26 21:17:36,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:36,668 INFO L93 Difference]: Finished difference Result 353 states and 382 transitions. [2018-09-26 21:17:36,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:17:36,669 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 327 [2018-09-26 21:17:36,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:36,670 INFO L225 Difference]: With dead ends: 353 [2018-09-26 21:17:36,671 INFO L226 Difference]: Without dead ends: 351 [2018-09-26 21:17:36,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:17:36,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-09-26 21:17:36,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 340. [2018-09-26 21:17:36,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-09-26 21:17:36,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 368 transitions. [2018-09-26 21:17:36,776 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 368 transitions. Word has length 327 [2018-09-26 21:17:36,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:36,776 INFO L480 AbstractCegarLoop]: Abstraction has 340 states and 368 transitions. [2018-09-26 21:17:36,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:17:36,776 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 368 transitions. [2018-09-26 21:17:36,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-09-26 21:17:36,777 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:36,778 INFO L375 BasicCegarLoop]: trace histogram [280, 28, 28, 1, 1, 1] [2018-09-26 21:17:36,778 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:36,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:36,778 INFO L82 PathProgramCache]: Analyzing trace with hash -48809189, now seen corresponding path program 31 times [2018-09-26 21:17:36,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:36,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:36,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:36,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:36,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:37,539 INFO L134 CoverageAnalysis]: Checked inductivity of 47684 backedges. 0 proven. 46144 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-09-26 21:17:37,539 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:37,539 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:17:37,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:37,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:37,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 47684 backedges. 0 proven. 46144 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-09-26 21:17:37,902 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:37,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-26 21:17:37,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-26 21:17:37,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-26 21:17:37,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:17:37,903 INFO L87 Difference]: Start difference. First operand 340 states and 368 transitions. Second operand 31 states. [2018-09-26 21:17:38,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:38,178 INFO L93 Difference]: Finished difference Result 365 states and 395 transitions. [2018-09-26 21:17:38,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:17:38,178 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 339 [2018-09-26 21:17:38,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:38,180 INFO L225 Difference]: With dead ends: 365 [2018-09-26 21:17:38,180 INFO L226 Difference]: Without dead ends: 363 [2018-09-26 21:17:38,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:17:38,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-09-26 21:17:38,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 352. [2018-09-26 21:17:38,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-09-26 21:17:38,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 381 transitions. [2018-09-26 21:17:38,315 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 381 transitions. Word has length 339 [2018-09-26 21:17:38,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:38,315 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 381 transitions. [2018-09-26 21:17:38,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-26 21:17:38,316 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 381 transitions. [2018-09-26 21:17:38,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-09-26 21:17:38,317 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:38,318 INFO L375 BasicCegarLoop]: trace histogram [290, 29, 29, 1, 1, 1] [2018-09-26 21:17:38,318 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:38,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:38,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1056419429, now seen corresponding path program 32 times [2018-09-26 21:17:38,318 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:38,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:38,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:38,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:38,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:38,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 51156 backedges. 0 proven. 49561 refuted. 0 times theorem prover too weak. 1595 trivial. 0 not checked. [2018-09-26 21:17:38,930 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:38,930 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 [2018-09-26 21:17:38,937 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:17:39,124 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:17:39,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:39,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:39,222 INFO L134 CoverageAnalysis]: Checked inductivity of 51156 backedges. 0 proven. 49561 refuted. 0 times theorem prover too weak. 1595 trivial. 0 not checked. [2018-09-26 21:17:39,243 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:39,243 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-26 21:17:39,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:17:39,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:17:39,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:17:39,244 INFO L87 Difference]: Start difference. First operand 352 states and 381 transitions. Second operand 32 states. [2018-09-26 21:17:39,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:39,509 INFO L93 Difference]: Finished difference Result 377 states and 408 transitions. [2018-09-26 21:17:39,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:17:39,509 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 351 [2018-09-26 21:17:39,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:39,511 INFO L225 Difference]: With dead ends: 377 [2018-09-26 21:17:39,511 INFO L226 Difference]: Without dead ends: 375 [2018-09-26 21:17:39,511 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 [2018-09-26 21:17:39,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2018-09-26 21:17:39,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 364. [2018-09-26 21:17:39,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-09-26 21:17:39,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 394 transitions. [2018-09-26 21:17:39,634 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 394 transitions. Word has length 351 [2018-09-26 21:17:39,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:39,634 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 394 transitions. [2018-09-26 21:17:39,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:17:39,635 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 394 transitions. [2018-09-26 21:17:39,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-09-26 21:17:39,636 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:39,637 INFO L375 BasicCegarLoop]: trace histogram [300, 30, 30, 1, 1, 1] [2018-09-26 21:17:39,637 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:39,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:39,637 INFO L82 PathProgramCache]: Analyzing trace with hash 2124645039, now seen corresponding path program 33 times [2018-09-26 21:17:39,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:39,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:39,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:39,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:39,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:39,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:40,679 INFO L134 CoverageAnalysis]: Checked inductivity of 54750 backedges. 0 proven. 53100 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-09-26 21:17:40,680 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:40,680 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 [2018-09-26 21:17:40,687 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:17:41,236 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 181 check-sat command(s) [2018-09-26 21:17:41,236 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:41,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:41,381 INFO L134 CoverageAnalysis]: Checked inductivity of 54750 backedges. 0 proven. 53100 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-09-26 21:17:41,417 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:41,417 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-26 21:17:41,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-26 21:17:41,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-26 21:17:41,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:17:41,419 INFO L87 Difference]: Start difference. First operand 364 states and 394 transitions. Second operand 33 states. [2018-09-26 21:17:42,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:42,475 INFO L93 Difference]: Finished difference Result 389 states and 421 transitions. [2018-09-26 21:17:42,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:17:42,475 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 363 [2018-09-26 21:17:42,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:42,477 INFO L225 Difference]: With dead ends: 389 [2018-09-26 21:17:42,477 INFO L226 Difference]: Without dead ends: 387 [2018-09-26 21:17:42,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:17:42,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2018-09-26 21:17:42,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 376. [2018-09-26 21:17:42,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2018-09-26 21:17:42,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 407 transitions. [2018-09-26 21:17:42,599 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 407 transitions. Word has length 363 [2018-09-26 21:17:42,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:42,600 INFO L480 AbstractCegarLoop]: Abstraction has 376 states and 407 transitions. [2018-09-26 21:17:42,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-26 21:17:42,600 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 407 transitions. [2018-09-26 21:17:42,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-09-26 21:17:42,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:42,601 INFO L375 BasicCegarLoop]: trace histogram [310, 31, 31, 1, 1, 1] [2018-09-26 21:17:42,602 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:42,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:42,602 INFO L82 PathProgramCache]: Analyzing trace with hash 152123385, now seen corresponding path program 34 times [2018-09-26 21:17:42,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:42,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:42,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:42,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:42,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:42,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 58466 backedges. 0 proven. 56761 refuted. 0 times theorem prover too weak. 1705 trivial. 0 not checked. [2018-09-26 21:17:43,661 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:43,661 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:17:43,668 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:17:43,869 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:17:43,869 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:43,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 58466 backedges. 0 proven. 56761 refuted. 0 times theorem prover too weak. 1705 trivial. 0 not checked. [2018-09-26 21:17:44,135 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:44,136 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-26 21:17:44,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:17:44,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:17:44,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:17:44,137 INFO L87 Difference]: Start difference. First operand 376 states and 407 transitions. Second operand 34 states. [2018-09-26 21:17:44,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:44,743 INFO L93 Difference]: Finished difference Result 401 states and 434 transitions. [2018-09-26 21:17:44,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:17:44,743 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 375 [2018-09-26 21:17:44,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:44,745 INFO L225 Difference]: With dead ends: 401 [2018-09-26 21:17:44,745 INFO L226 Difference]: Without dead ends: 399 [2018-09-26 21:17:44,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:17:44,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-09-26 21:17:44,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 388. [2018-09-26 21:17:44,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-09-26 21:17:44,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 420 transitions. [2018-09-26 21:17:44,888 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 420 transitions. Word has length 375 [2018-09-26 21:17:44,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:44,888 INFO L480 AbstractCegarLoop]: Abstraction has 388 states and 420 transitions. [2018-09-26 21:17:44,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:17:44,889 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 420 transitions. [2018-09-26 21:17:44,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-09-26 21:17:44,891 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:44,891 INFO L375 BasicCegarLoop]: trace histogram [320, 32, 32, 1, 1, 1] [2018-09-26 21:17:44,891 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:44,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:44,892 INFO L82 PathProgramCache]: Analyzing trace with hash -310948285, now seen corresponding path program 35 times [2018-09-26 21:17:44,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:44,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:44,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:44,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:44,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:44,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 62304 backedges. 0 proven. 60544 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2018-09-26 21:17:45,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:45,594 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 [2018-09-26 21:17:45,602 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:17:46,226 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 193 check-sat command(s) [2018-09-26 21:17:46,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:46,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 62304 backedges. 0 proven. 60544 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2018-09-26 21:17:46,355 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:46,356 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-26 21:17:46,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-26 21:17:46,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-26 21:17:46,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:17:46,357 INFO L87 Difference]: Start difference. First operand 388 states and 420 transitions. Second operand 35 states. [2018-09-26 21:17:46,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:46,656 INFO L93 Difference]: Finished difference Result 413 states and 447 transitions. [2018-09-26 21:17:46,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:17:46,657 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 387 [2018-09-26 21:17:46,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:46,658 INFO L225 Difference]: With dead ends: 413 [2018-09-26 21:17:46,658 INFO L226 Difference]: Without dead ends: 411 [2018-09-26 21:17:46,659 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 [2018-09-26 21:17:46,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2018-09-26 21:17:46,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 400. [2018-09-26 21:17:46,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2018-09-26 21:17:46,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 433 transitions. [2018-09-26 21:17:46,808 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 433 transitions. Word has length 387 [2018-09-26 21:17:46,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:46,808 INFO L480 AbstractCegarLoop]: Abstraction has 400 states and 433 transitions. [2018-09-26 21:17:46,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-26 21:17:46,808 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 433 transitions. [2018-09-26 21:17:46,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-09-26 21:17:46,810 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:46,811 INFO L375 BasicCegarLoop]: trace histogram [330, 33, 33, 1, 1, 1] [2018-09-26 21:17:46,811 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:46,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:46,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1655945843, now seen corresponding path program 36 times [2018-09-26 21:17:46,811 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:46,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:46,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:46,812 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:46,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:47,575 INFO L134 CoverageAnalysis]: Checked inductivity of 66264 backedges. 0 proven. 64449 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2018-09-26 21:17:47,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:47,575 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 [2018-09-26 21:17:47,582 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:17:48,214 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 195 check-sat command(s) [2018-09-26 21:17:48,214 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:48,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 66264 backedges. 0 proven. 64449 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2018-09-26 21:17:48,376 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:48,376 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-26 21:17:48,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:17:48,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:17:48,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:17:48,378 INFO L87 Difference]: Start difference. First operand 400 states and 433 transitions. Second operand 36 states. [2018-09-26 21:17:48,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:48,711 INFO L93 Difference]: Finished difference Result 425 states and 460 transitions. [2018-09-26 21:17:48,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:17:48,714 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 399 [2018-09-26 21:17:48,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:48,716 INFO L225 Difference]: With dead ends: 425 [2018-09-26 21:17:48,717 INFO L226 Difference]: Without dead ends: 423 [2018-09-26 21:17:48,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:17:48,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2018-09-26 21:17:48,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 412. [2018-09-26 21:17:48,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-09-26 21:17:48,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 446 transitions. [2018-09-26 21:17:48,863 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 446 transitions. Word has length 399 [2018-09-26 21:17:48,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:48,863 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 446 transitions. [2018-09-26 21:17:48,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:17:48,863 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 446 transitions. [2018-09-26 21:17:48,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-09-26 21:17:48,864 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:48,865 INFO L375 BasicCegarLoop]: trace histogram [340, 34, 34, 1, 1, 1] [2018-09-26 21:17:48,865 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:48,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:48,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1941529129, now seen corresponding path program 37 times [2018-09-26 21:17:48,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:48,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:48,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:48,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:48,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 70346 backedges. 0 proven. 68476 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2018-09-26 21:17:49,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:49,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:17:49,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:50,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:50,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:50,223 INFO L134 CoverageAnalysis]: Checked inductivity of 70346 backedges. 0 proven. 68476 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2018-09-26 21:17:50,243 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:50,244 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-26 21:17:50,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-26 21:17:50,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-26 21:17:50,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:17:50,245 INFO L87 Difference]: Start difference. First operand 412 states and 446 transitions. Second operand 37 states. [2018-09-26 21:17:50,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:50,584 INFO L93 Difference]: Finished difference Result 437 states and 473 transitions. [2018-09-26 21:17:50,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:17:50,584 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 411 [2018-09-26 21:17:50,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:50,586 INFO L225 Difference]: With dead ends: 437 [2018-09-26 21:17:50,586 INFO L226 Difference]: Without dead ends: 435 [2018-09-26 21:17:50,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:17:50,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2018-09-26 21:17:50,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 424. [2018-09-26 21:17:50,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-09-26 21:17:50,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 459 transitions. [2018-09-26 21:17:50,747 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 459 transitions. Word has length 411 [2018-09-26 21:17:50,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:50,747 INFO L480 AbstractCegarLoop]: Abstraction has 424 states and 459 transitions. [2018-09-26 21:17:50,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-26 21:17:50,747 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 459 transitions. [2018-09-26 21:17:50,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-09-26 21:17:50,750 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:50,750 INFO L375 BasicCegarLoop]: trace histogram [350, 35, 35, 1, 1, 1] [2018-09-26 21:17:50,750 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:50,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:50,751 INFO L82 PathProgramCache]: Analyzing trace with hash -799221983, now seen corresponding path program 38 times [2018-09-26 21:17:50,751 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:50,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:50,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:50,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:50,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:50,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:52,163 INFO L134 CoverageAnalysis]: Checked inductivity of 74550 backedges. 0 proven. 72625 refuted. 0 times theorem prover too weak. 1925 trivial. 0 not checked. [2018-09-26 21:17:52,164 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:52,164 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 [2018-09-26 21:17:52,171 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:17:52,394 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:17:52,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:52,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:52,577 INFO L134 CoverageAnalysis]: Checked inductivity of 74550 backedges. 0 proven. 72625 refuted. 0 times theorem prover too weak. 1925 trivial. 0 not checked. [2018-09-26 21:17:52,612 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:52,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-26 21:17:52,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:17:52,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:17:52,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:17:52,615 INFO L87 Difference]: Start difference. First operand 424 states and 459 transitions. Second operand 38 states. [2018-09-26 21:17:53,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:53,208 INFO L93 Difference]: Finished difference Result 449 states and 486 transitions. [2018-09-26 21:17:53,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:17:53,208 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 423 [2018-09-26 21:17:53,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:53,210 INFO L225 Difference]: With dead ends: 449 [2018-09-26 21:17:53,210 INFO L226 Difference]: Without dead ends: 447 [2018-09-26 21:17:53,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:17:53,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-09-26 21:17:53,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 436. [2018-09-26 21:17:53,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2018-09-26 21:17:53,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 472 transitions. [2018-09-26 21:17:53,379 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 472 transitions. Word has length 423 [2018-09-26 21:17:53,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:53,380 INFO L480 AbstractCegarLoop]: Abstraction has 436 states and 472 transitions. [2018-09-26 21:17:53,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:17:53,380 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 472 transitions. [2018-09-26 21:17:53,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-09-26 21:17:53,382 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:53,383 INFO L375 BasicCegarLoop]: trace histogram [360, 36, 36, 1, 1, 1] [2018-09-26 21:17:53,383 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:53,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:53,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1044024981, now seen corresponding path program 39 times [2018-09-26 21:17:53,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:53,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:53,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:53,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:53,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:53,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:54,392 INFO L134 CoverageAnalysis]: Checked inductivity of 78876 backedges. 0 proven. 76896 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-09-26 21:17:54,392 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:54,392 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:17:54,400 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:17:55,142 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 217 check-sat command(s) [2018-09-26 21:17:55,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:55,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:55,277 INFO L134 CoverageAnalysis]: Checked inductivity of 78876 backedges. 0 proven. 76896 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-09-26 21:17:55,299 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:55,299 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-26 21:17:55,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-26 21:17:55,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-26 21:17:55,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:17:55,300 INFO L87 Difference]: Start difference. First operand 436 states and 472 transitions. Second operand 39 states. [2018-09-26 21:17:55,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:55,655 INFO L93 Difference]: Finished difference Result 461 states and 499 transitions. [2018-09-26 21:17:55,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:17:55,655 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 435 [2018-09-26 21:17:55,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:55,657 INFO L225 Difference]: With dead ends: 461 [2018-09-26 21:17:55,657 INFO L226 Difference]: Without dead ends: 459 [2018-09-26 21:17:55,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:17:55,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2018-09-26 21:17:55,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 448. [2018-09-26 21:17:55,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2018-09-26 21:17:55,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 485 transitions. [2018-09-26 21:17:55,830 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 485 transitions. Word has length 435 [2018-09-26 21:17:55,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:55,830 INFO L480 AbstractCegarLoop]: Abstraction has 448 states and 485 transitions. [2018-09-26 21:17:55,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-26 21:17:55,830 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 485 transitions. [2018-09-26 21:17:55,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2018-09-26 21:17:55,832 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:55,832 INFO L375 BasicCegarLoop]: trace histogram [370, 37, 37, 1, 1, 1] [2018-09-26 21:17:55,832 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:55,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:55,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1695093579, now seen corresponding path program 40 times [2018-09-26 21:17:55,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:55,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:55,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:55,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:55,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:55,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:57,035 INFO L134 CoverageAnalysis]: Checked inductivity of 83324 backedges. 0 proven. 81289 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2018-09-26 21:17:57,035 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:57,035 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 [2018-09-26 21:17:57,043 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:17:57,283 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:17:57,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:57,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 83324 backedges. 0 proven. 81289 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2018-09-26 21:17:57,486 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:57,486 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-26 21:17:57,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:17:57,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:17:57,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:17:57,487 INFO L87 Difference]: Start difference. First operand 448 states and 485 transitions. Second operand 40 states. [2018-09-26 21:17:57,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:57,917 INFO L93 Difference]: Finished difference Result 473 states and 512 transitions. [2018-09-26 21:17:57,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-26 21:17:57,918 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 447 [2018-09-26 21:17:57,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:57,919 INFO L225 Difference]: With dead ends: 473 [2018-09-26 21:17:57,919 INFO L226 Difference]: Without dead ends: 471 [2018-09-26 21:17:57,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:17:57,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2018-09-26 21:17:58,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 460. [2018-09-26 21:17:58,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2018-09-26 21:17:58,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 498 transitions. [2018-09-26 21:17:58,121 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 498 transitions. Word has length 447 [2018-09-26 21:17:58,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:58,122 INFO L480 AbstractCegarLoop]: Abstraction has 460 states and 498 transitions. [2018-09-26 21:17:58,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:17:58,122 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 498 transitions. [2018-09-26 21:17:58,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2018-09-26 21:17:58,124 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:58,124 INFO L375 BasicCegarLoop]: trace histogram [380, 38, 38, 1, 1, 1] [2018-09-26 21:17:58,124 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:58,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:58,125 INFO L82 PathProgramCache]: Analyzing trace with hash 413649151, now seen corresponding path program 41 times [2018-09-26 21:17:58,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:58,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:58,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:58,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:58,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:59,366 INFO L134 CoverageAnalysis]: Checked inductivity of 87894 backedges. 0 proven. 85804 refuted. 0 times theorem prover too weak. 2090 trivial. 0 not checked. [2018-09-26 21:17:59,366 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:59,366 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 [2018-09-26 21:17:59,374 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:18:00,176 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 229 check-sat command(s) [2018-09-26 21:18:00,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:00,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:00,336 INFO L134 CoverageAnalysis]: Checked inductivity of 87894 backedges. 0 proven. 85804 refuted. 0 times theorem prover too weak. 2090 trivial. 0 not checked. [2018-09-26 21:18:00,359 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:00,359 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-26 21:18:00,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:18:00,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:18:00,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:18:00,361 INFO L87 Difference]: Start difference. First operand 460 states and 498 transitions. Second operand 41 states. [2018-09-26 21:18:00,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:00,956 INFO L93 Difference]: Finished difference Result 485 states and 525 transitions. [2018-09-26 21:18:00,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:18:00,957 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 459 [2018-09-26 21:18:00,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:00,958 INFO L225 Difference]: With dead ends: 485 [2018-09-26 21:18:00,958 INFO L226 Difference]: Without dead ends: 483 [2018-09-26 21:18:00,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:18:00,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2018-09-26 21:18:01,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 472. [2018-09-26 21:18:01,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 472 states. [2018-09-26 21:18:01,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 511 transitions. [2018-09-26 21:18:01,178 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 511 transitions. Word has length 459 [2018-09-26 21:18:01,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:01,178 INFO L480 AbstractCegarLoop]: Abstraction has 472 states and 511 transitions. [2018-09-26 21:18:01,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:18:01,179 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 511 transitions. [2018-09-26 21:18:01,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2018-09-26 21:18:01,181 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:01,182 INFO L375 BasicCegarLoop]: trace histogram [390, 39, 39, 1, 1, 1] [2018-09-26 21:18:01,182 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:01,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:01,182 INFO L82 PathProgramCache]: Analyzing trace with hash 432965193, now seen corresponding path program 42 times [2018-09-26 21:18:01,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:01,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:01,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:01,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:01,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:02,368 INFO L134 CoverageAnalysis]: Checked inductivity of 92586 backedges. 0 proven. 90441 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-09-26 21:18:02,369 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:02,369 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 [2018-09-26 21:18:02,377 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:18:03,230 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 230 check-sat command(s) [2018-09-26 21:18:03,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:03,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:03,391 INFO L134 CoverageAnalysis]: Checked inductivity of 92586 backedges. 0 proven. 90441 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-09-26 21:18:03,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:03,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-26 21:18:03,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:18:03,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:18:03,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:18:03,415 INFO L87 Difference]: Start difference. First operand 472 states and 511 transitions. Second operand 42 states. [2018-09-26 21:18:03,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:03,812 INFO L93 Difference]: Finished difference Result 497 states and 538 transitions. [2018-09-26 21:18:03,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:18:03,812 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 471 [2018-09-26 21:18:03,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:03,814 INFO L225 Difference]: With dead ends: 497 [2018-09-26 21:18:03,814 INFO L226 Difference]: Without dead ends: 495 [2018-09-26 21:18:03,814 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 [2018-09-26 21:18:03,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-09-26 21:18:04,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 484. [2018-09-26 21:18:04,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2018-09-26 21:18:04,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 524 transitions. [2018-09-26 21:18:04,020 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 524 transitions. Word has length 471 [2018-09-26 21:18:04,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:04,021 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 524 transitions. [2018-09-26 21:18:04,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:18:04,021 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 524 transitions. [2018-09-26 21:18:04,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2018-09-26 21:18:04,023 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:04,024 INFO L375 BasicCegarLoop]: trace histogram [400, 40, 40, 1, 1, 1] [2018-09-26 21:18:04,024 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:04,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:04,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1067558035, now seen corresponding path program 43 times [2018-09-26 21:18:04,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:04,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:04,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:04,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:04,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:05,390 INFO L134 CoverageAnalysis]: Checked inductivity of 97400 backedges. 0 proven. 95200 refuted. 0 times theorem prover too weak. 2200 trivial. 0 not checked. [2018-09-26 21:18:05,391 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:05,391 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:18:05,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:18:05,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:05,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 97400 backedges. 0 proven. 95200 refuted. 0 times theorem prover too weak. 2200 trivial. 0 not checked. [2018-09-26 21:18:05,844 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:05,844 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-26 21:18:05,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-26 21:18:05,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-26 21:18:05,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:18:05,845 INFO L87 Difference]: Start difference. First operand 484 states and 524 transitions. Second operand 43 states. [2018-09-26 21:18:06,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:06,268 INFO L93 Difference]: Finished difference Result 509 states and 551 transitions. [2018-09-26 21:18:06,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:18:06,268 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 483 [2018-09-26 21:18:06,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:06,270 INFO L225 Difference]: With dead ends: 509 [2018-09-26 21:18:06,270 INFO L226 Difference]: Without dead ends: 507 [2018-09-26 21:18:06,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:18:06,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2018-09-26 21:18:06,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 496. [2018-09-26 21:18:06,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2018-09-26 21:18:06,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 537 transitions. [2018-09-26 21:18:06,491 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 537 transitions. Word has length 483 [2018-09-26 21:18:06,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:06,491 INFO L480 AbstractCegarLoop]: Abstraction has 496 states and 537 transitions. [2018-09-26 21:18:06,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-26 21:18:06,491 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 537 transitions. [2018-09-26 21:18:06,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2018-09-26 21:18:06,493 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:06,493 INFO L375 BasicCegarLoop]: trace histogram [410, 41, 41, 1, 1, 1] [2018-09-26 21:18:06,493 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:06,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:06,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1919441955, now seen corresponding path program 44 times [2018-09-26 21:18:06,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:06,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:06,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:06,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:18:06,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:06,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:07,439 INFO L134 CoverageAnalysis]: Checked inductivity of 102336 backedges. 0 proven. 100081 refuted. 0 times theorem prover too weak. 2255 trivial. 0 not checked. [2018-09-26 21:18:07,440 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:07,440 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 [2018-09-26 21:18:07,448 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:18:07,713 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:18:07,713 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:07,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:07,946 INFO L134 CoverageAnalysis]: Checked inductivity of 102336 backedges. 0 proven. 100081 refuted. 0 times theorem prover too weak. 2255 trivial. 0 not checked. [2018-09-26 21:18:07,967 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:07,967 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-26 21:18:07,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:18:07,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:18:07,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:18:07,968 INFO L87 Difference]: Start difference. First operand 496 states and 537 transitions. Second operand 44 states. [2018-09-26 21:18:08,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:08,435 INFO L93 Difference]: Finished difference Result 521 states and 564 transitions. [2018-09-26 21:18:08,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-26 21:18:08,436 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 495 [2018-09-26 21:18:08,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:08,438 INFO L225 Difference]: With dead ends: 521 [2018-09-26 21:18:08,438 INFO L226 Difference]: Without dead ends: 519 [2018-09-26 21:18:08,438 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 [2018-09-26 21:18:08,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2018-09-26 21:18:08,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 508. [2018-09-26 21:18:08,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2018-09-26 21:18:08,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 550 transitions. [2018-09-26 21:18:08,685 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 550 transitions. Word has length 495 [2018-09-26 21:18:08,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:08,686 INFO L480 AbstractCegarLoop]: Abstraction has 508 states and 550 transitions. [2018-09-26 21:18:08,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:18:08,686 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 550 transitions. [2018-09-26 21:18:08,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2018-09-26 21:18:08,688 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:08,688 INFO L375 BasicCegarLoop]: trace histogram [420, 42, 42, 1, 1, 1] [2018-09-26 21:18:08,688 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:08,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:08,688 INFO L82 PathProgramCache]: Analyzing trace with hash 157746215, now seen corresponding path program 45 times [2018-09-26 21:18:08,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:08,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:08,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:08,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:08,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 107394 backedges. 0 proven. 105084 refuted. 0 times theorem prover too weak. 2310 trivial. 0 not checked. [2018-09-26 21:18:09,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:09,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:18:09,713 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:18:10,808 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 253 check-sat command(s) [2018-09-26 21:18:10,809 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:10,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:10,995 INFO L134 CoverageAnalysis]: Checked inductivity of 107394 backedges. 0 proven. 105084 refuted. 0 times theorem prover too weak. 2310 trivial. 0 not checked. [2018-09-26 21:18:11,017 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:11,017 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-26 21:18:11,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-26 21:18:11,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-26 21:18:11,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:18:11,018 INFO L87 Difference]: Start difference. First operand 508 states and 550 transitions. Second operand 45 states. [2018-09-26 21:18:11,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:11,867 INFO L93 Difference]: Finished difference Result 533 states and 577 transitions. [2018-09-26 21:18:11,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-26 21:18:11,869 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 507 [2018-09-26 21:18:11,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:11,871 INFO L225 Difference]: With dead ends: 533 [2018-09-26 21:18:11,871 INFO L226 Difference]: Without dead ends: 531 [2018-09-26 21:18:11,872 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 [2018-09-26 21:18:11,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2018-09-26 21:18:12,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 520. [2018-09-26 21:18:12,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2018-09-26 21:18:12,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 563 transitions. [2018-09-26 21:18:12,162 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 563 transitions. Word has length 507 [2018-09-26 21:18:12,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:12,162 INFO L480 AbstractCegarLoop]: Abstraction has 520 states and 563 transitions. [2018-09-26 21:18:12,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-26 21:18:12,163 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 563 transitions. [2018-09-26 21:18:12,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2018-09-26 21:18:12,165 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:12,165 INFO L375 BasicCegarLoop]: trace histogram [430, 43, 43, 1, 1, 1] [2018-09-26 21:18:12,165 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:12,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:12,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1527137649, now seen corresponding path program 46 times [2018-09-26 21:18:12,165 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:12,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:12,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:12,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:12,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:12,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:13,169 INFO L134 CoverageAnalysis]: Checked inductivity of 112574 backedges. 0 proven. 110209 refuted. 0 times theorem prover too weak. 2365 trivial. 0 not checked. [2018-09-26 21:18:13,170 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:13,170 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 [2018-09-26 21:18:13,179 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:18:13,464 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:18:13,464 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:13,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 112574 backedges. 0 proven. 110209 refuted. 0 times theorem prover too weak. 2365 trivial. 0 not checked. [2018-09-26 21:18:13,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:13,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-26 21:18:13,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-26 21:18:13,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-26 21:18:13,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:18:13,661 INFO L87 Difference]: Start difference. First operand 520 states and 563 transitions. Second operand 46 states. [2018-09-26 21:18:14,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:14,216 INFO L93 Difference]: Finished difference Result 545 states and 590 transitions. [2018-09-26 21:18:14,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-26 21:18:14,217 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 519 [2018-09-26 21:18:14,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:14,219 INFO L225 Difference]: With dead ends: 545 [2018-09-26 21:18:14,219 INFO L226 Difference]: Without dead ends: 543 [2018-09-26 21:18:14,220 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 [2018-09-26 21:18:14,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2018-09-26 21:18:14,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 532. [2018-09-26 21:18:14,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2018-09-26 21:18:14,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 576 transitions. [2018-09-26 21:18:14,513 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 576 transitions. Word has length 519 [2018-09-26 21:18:14,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:14,513 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 576 transitions. [2018-09-26 21:18:14,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-26 21:18:14,514 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 576 transitions. [2018-09-26 21:18:14,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2018-09-26 21:18:14,516 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:14,516 INFO L375 BasicCegarLoop]: trace histogram [440, 44, 44, 1, 1, 1] [2018-09-26 21:18:14,516 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:14,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:14,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1823205307, now seen corresponding path program 47 times [2018-09-26 21:18:14,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:14,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:14,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:14,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:14,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:15,652 INFO L134 CoverageAnalysis]: Checked inductivity of 117876 backedges. 0 proven. 115456 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2018-09-26 21:18:15,653 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:15,653 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 [2018-09-26 21:18:15,660 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:18:16,712 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 265 check-sat command(s) [2018-09-26 21:18:16,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:16,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:16,898 INFO L134 CoverageAnalysis]: Checked inductivity of 117876 backedges. 0 proven. 115456 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2018-09-26 21:18:16,919 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:16,919 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-26 21:18:16,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-26 21:18:16,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-26 21:18:16,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:18:16,920 INFO L87 Difference]: Start difference. First operand 532 states and 576 transitions. Second operand 47 states. [2018-09-26 21:18:17,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:17,576 INFO L93 Difference]: Finished difference Result 557 states and 603 transitions. [2018-09-26 21:18:17,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:18:17,577 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 531 [2018-09-26 21:18:17,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:17,579 INFO L225 Difference]: With dead ends: 557 [2018-09-26 21:18:17,579 INFO L226 Difference]: Without dead ends: 555 [2018-09-26 21:18:17,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 531 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:18:17,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2018-09-26 21:18:17,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 544. [2018-09-26 21:18:17,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2018-09-26 21:18:17,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 589 transitions. [2018-09-26 21:18:17,858 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 589 transitions. Word has length 531 [2018-09-26 21:18:17,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:17,858 INFO L480 AbstractCegarLoop]: Abstraction has 544 states and 589 transitions. [2018-09-26 21:18:17,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-26 21:18:17,859 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 589 transitions. [2018-09-26 21:18:17,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2018-09-26 21:18:17,861 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:17,861 INFO L375 BasicCegarLoop]: trace histogram [450, 45, 45, 1, 1, 1] [2018-09-26 21:18:17,861 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:17,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:17,862 INFO L82 PathProgramCache]: Analyzing trace with hash 181299973, now seen corresponding path program 48 times [2018-09-26 21:18:17,862 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:17,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:17,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:17,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:17,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:17,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:18,941 INFO L134 CoverageAnalysis]: Checked inductivity of 123300 backedges. 0 proven. 120825 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2018-09-26 21:18:18,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:18,941 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:18:18,948 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:18:20,058 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 267 check-sat command(s) [2018-09-26 21:18:20,059 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:20,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 123300 backedges. 0 proven. 120825 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2018-09-26 21:18:20,274 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:20,274 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-26 21:18:20,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:18:20,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:18:20,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:18:20,275 INFO L87 Difference]: Start difference. First operand 544 states and 589 transitions. Second operand 48 states. [2018-09-26 21:18:20,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:20,788 INFO L93 Difference]: Finished difference Result 569 states and 616 transitions. [2018-09-26 21:18:20,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-26 21:18:20,788 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 543 [2018-09-26 21:18:20,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:20,790 INFO L225 Difference]: With dead ends: 569 [2018-09-26 21:18:20,790 INFO L226 Difference]: Without dead ends: 567 [2018-09-26 21:18:20,791 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 [2018-09-26 21:18:20,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2018-09-26 21:18:21,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 556. [2018-09-26 21:18:21,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2018-09-26 21:18:21,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 602 transitions. [2018-09-26 21:18:21,074 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 602 transitions. Word has length 543 [2018-09-26 21:18:21,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:21,075 INFO L480 AbstractCegarLoop]: Abstraction has 556 states and 602 transitions. [2018-09-26 21:18:21,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:18:21,075 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 602 transitions. [2018-09-26 21:18:21,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2018-09-26 21:18:21,077 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:21,077 INFO L375 BasicCegarLoop]: trace histogram [460, 46, 46, 1, 1, 1] [2018-09-26 21:18:21,078 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:21,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:21,078 INFO L82 PathProgramCache]: Analyzing trace with hash -2077995185, now seen corresponding path program 49 times [2018-09-26 21:18:21,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:21,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:21,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:21,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:21,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:21,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:22,228 INFO L134 CoverageAnalysis]: Checked inductivity of 128846 backedges. 0 proven. 126316 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2018-09-26 21:18:22,228 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:22,228 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 [2018-09-26 21:18:22,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:18:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:22,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 128846 backedges. 0 proven. 126316 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2018-09-26 21:18:22,829 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:22,829 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-26 21:18:22,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-26 21:18:22,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-26 21:18:22,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:18:22,831 INFO L87 Difference]: Start difference. First operand 556 states and 602 transitions. Second operand 49 states. [2018-09-26 21:18:23,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:23,396 INFO L93 Difference]: Finished difference Result 581 states and 629 transitions. [2018-09-26 21:18:23,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:18:23,397 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 555 [2018-09-26 21:18:23,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:23,399 INFO L225 Difference]: With dead ends: 581 [2018-09-26 21:18:23,399 INFO L226 Difference]: Without dead ends: 579 [2018-09-26 21:18:23,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 555 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:18:23,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2018-09-26 21:18:23,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 568. [2018-09-26 21:18:23,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568 states. [2018-09-26 21:18:23,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 615 transitions. [2018-09-26 21:18:23,676 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 615 transitions. Word has length 555 [2018-09-26 21:18:23,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:23,676 INFO L480 AbstractCegarLoop]: Abstraction has 568 states and 615 transitions. [2018-09-26 21:18:23,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-26 21:18:23,677 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 615 transitions. [2018-09-26 21:18:23,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2018-09-26 21:18:23,679 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:23,680 INFO L375 BasicCegarLoop]: trace histogram [470, 47, 47, 1, 1, 1] [2018-09-26 21:18:23,680 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:23,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:23,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1235489945, now seen corresponding path program 50 times [2018-09-26 21:18:23,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:23,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:23,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:23,681 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:18:23,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 134514 backedges. 0 proven. 131929 refuted. 0 times theorem prover too weak. 2585 trivial. 0 not checked. [2018-09-26 21:18:25,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:25,081 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 [2018-09-26 21:18:25,089 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:18:25,394 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:18:25,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:25,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:25,624 INFO L134 CoverageAnalysis]: Checked inductivity of 134514 backedges. 0 proven. 131929 refuted. 0 times theorem prover too weak. 2585 trivial. 0 not checked. [2018-09-26 21:18:25,646 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:25,647 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-26 21:18:25,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:18:25,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:18:25,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:18:25,648 INFO L87 Difference]: Start difference. First operand 568 states and 615 transitions. Second operand 50 states. [2018-09-26 21:18:26,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:26,204 INFO L93 Difference]: Finished difference Result 593 states and 642 transitions. [2018-09-26 21:18:26,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:18:26,204 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 567 [2018-09-26 21:18:26,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:26,206 INFO L225 Difference]: With dead ends: 593 [2018-09-26 21:18:26,206 INFO L226 Difference]: Without dead ends: 591 [2018-09-26 21:18:26,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:18:26,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2018-09-26 21:18:26,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 580. [2018-09-26 21:18:26,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 580 states. [2018-09-26 21:18:26,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 628 transitions. [2018-09-26 21:18:26,530 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 628 transitions. Word has length 567 [2018-09-26 21:18:26,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:26,531 INFO L480 AbstractCegarLoop]: Abstraction has 580 states and 628 transitions. [2018-09-26 21:18:26,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:18:26,531 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 628 transitions. [2018-09-26 21:18:26,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2018-09-26 21:18:26,533 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:26,534 INFO L375 BasicCegarLoop]: trace histogram [480, 48, 48, 1, 1, 1] [2018-09-26 21:18:26,534 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:26,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:26,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1903936797, now seen corresponding path program 51 times [2018-09-26 21:18:26,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:26,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:26,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:26,535 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:26,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:26,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:27,840 INFO L134 CoverageAnalysis]: Checked inductivity of 140304 backedges. 0 proven. 137664 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2018-09-26 21:18:27,840 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:27,840 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 [2018-09-26 21:18:27,850 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:18:29,152 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 289 check-sat command(s) [2018-09-26 21:18:29,153 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:29,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:29,370 INFO L134 CoverageAnalysis]: Checked inductivity of 140304 backedges. 0 proven. 137664 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2018-09-26 21:18:29,391 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:29,391 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-26 21:18:29,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-26 21:18:29,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-26 21:18:29,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-26 21:18:29,393 INFO L87 Difference]: Start difference. First operand 580 states and 628 transitions. Second operand 51 states. [2018-09-26 21:18:29,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:29,958 INFO L93 Difference]: Finished difference Result 605 states and 655 transitions. [2018-09-26 21:18:29,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:18:29,958 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 579 [2018-09-26 21:18:29,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:29,960 INFO L225 Difference]: With dead ends: 605 [2018-09-26 21:18:29,960 INFO L226 Difference]: Without dead ends: 603 [2018-09-26 21:18:29,960 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 [2018-09-26 21:18:29,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2018-09-26 21:18:30,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 592. [2018-09-26 21:18:30,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2018-09-26 21:18:30,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 641 transitions. [2018-09-26 21:18:30,330 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 641 transitions. Word has length 579 [2018-09-26 21:18:30,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:30,330 INFO L480 AbstractCegarLoop]: Abstraction has 592 states and 641 transitions. [2018-09-26 21:18:30,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-26 21:18:30,331 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 641 transitions. [2018-09-26 21:18:30,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2018-09-26 21:18:30,333 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:30,333 INFO L375 BasicCegarLoop]: trace histogram [490, 49, 49, 1, 1, 1] [2018-09-26 21:18:30,333 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:30,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:30,334 INFO L82 PathProgramCache]: Analyzing trace with hash -398769619, now seen corresponding path program 52 times [2018-09-26 21:18:30,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:30,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:30,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:30,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:30,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:30,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:31,658 INFO L134 CoverageAnalysis]: Checked inductivity of 146216 backedges. 0 proven. 143521 refuted. 0 times theorem prover too weak. 2695 trivial. 0 not checked. [2018-09-26 21:18:31,658 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:31,658 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 [2018-09-26 21:18:31,667 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:18:31,985 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:18:31,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:31,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:32,222 INFO L134 CoverageAnalysis]: Checked inductivity of 146216 backedges. 0 proven. 143521 refuted. 0 times theorem prover too weak. 2695 trivial. 0 not checked. [2018-09-26 21:18:32,244 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:32,244 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-26 21:18:32,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-26 21:18:32,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-26 21:18:32,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:18:32,246 INFO L87 Difference]: Start difference. First operand 592 states and 641 transitions. Second operand 52 states. [2018-09-26 21:18:32,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:32,864 INFO L93 Difference]: Finished difference Result 617 states and 668 transitions. [2018-09-26 21:18:32,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-26 21:18:32,864 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 591 [2018-09-26 21:18:32,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:32,866 INFO L225 Difference]: With dead ends: 617 [2018-09-26 21:18:32,866 INFO L226 Difference]: Without dead ends: 615 [2018-09-26 21:18:32,867 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 [2018-09-26 21:18:32,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2018-09-26 21:18:33,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 604. [2018-09-26 21:18:33,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604 states. [2018-09-26 21:18:33,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 654 transitions. [2018-09-26 21:18:33,211 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 654 transitions. Word has length 591 [2018-09-26 21:18:33,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:33,211 INFO L480 AbstractCegarLoop]: Abstraction has 604 states and 654 transitions. [2018-09-26 21:18:33,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-26 21:18:33,211 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 654 transitions. [2018-09-26 21:18:33,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 604 [2018-09-26 21:18:33,214 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:33,214 INFO L375 BasicCegarLoop]: trace histogram [500, 50, 50, 1, 1, 1] [2018-09-26 21:18:33,214 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:33,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:33,214 INFO L82 PathProgramCache]: Analyzing trace with hash -293623177, now seen corresponding path program 53 times [2018-09-26 21:18:33,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:33,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:33,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:33,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:33,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:34,837 INFO L134 CoverageAnalysis]: Checked inductivity of 152250 backedges. 0 proven. 149500 refuted. 0 times theorem prover too weak. 2750 trivial. 0 not checked. [2018-09-26 21:18:34,837 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:34,837 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 [2018-09-26 21:18:34,845 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:18:36,182 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 301 check-sat command(s) [2018-09-26 21:18:36,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:36,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 152250 backedges. 0 proven. 149500 refuted. 0 times theorem prover too weak. 2750 trivial. 0 not checked. [2018-09-26 21:18:36,437 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:36,437 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-26 21:18:36,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-26 21:18:36,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-26 21:18:36,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:18:36,438 INFO L87 Difference]: Start difference. First operand 604 states and 654 transitions. Second operand 53 states. [2018-09-26 21:18:37,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:37,063 INFO L93 Difference]: Finished difference Result 629 states and 681 transitions. [2018-09-26 21:18:37,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:18:37,063 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 603 [2018-09-26 21:18:37,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:37,065 INFO L225 Difference]: With dead ends: 629 [2018-09-26 21:18:37,066 INFO L226 Difference]: Without dead ends: 627 [2018-09-26 21:18:37,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 603 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:18:37,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2018-09-26 21:18:37,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 616. [2018-09-26 21:18:37,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 616 states. [2018-09-26 21:18:37,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 667 transitions. [2018-09-26 21:18:37,394 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 667 transitions. Word has length 603 [2018-09-26 21:18:37,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:37,395 INFO L480 AbstractCegarLoop]: Abstraction has 616 states and 667 transitions. [2018-09-26 21:18:37,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-26 21:18:37,395 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 667 transitions. [2018-09-26 21:18:37,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2018-09-26 21:18:37,397 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:37,397 INFO L375 BasicCegarLoop]: trace histogram [510, 51, 51, 1, 1, 1] [2018-09-26 21:18:37,398 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:37,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:37,398 INFO L82 PathProgramCache]: Analyzing trace with hash -616041535, now seen corresponding path program 54 times [2018-09-26 21:18:37,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:37,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:37,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:37,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:37,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:38,815 INFO L134 CoverageAnalysis]: Checked inductivity of 158406 backedges. 0 proven. 155601 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2018-09-26 21:18:38,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:38,816 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:18:38,822 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:18:40,258 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 302 check-sat command(s) [2018-09-26 21:18:40,258 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:40,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:40,617 INFO L134 CoverageAnalysis]: Checked inductivity of 158406 backedges. 0 proven. 155601 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2018-09-26 21:18:40,639 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:40,639 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-26 21:18:40,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-26 21:18:40,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-26 21:18:40,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:18:40,640 INFO L87 Difference]: Start difference. First operand 616 states and 667 transitions. Second operand 54 states. [2018-09-26 21:18:41,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:41,300 INFO L93 Difference]: Finished difference Result 641 states and 694 transitions. [2018-09-26 21:18:41,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-26 21:18:41,301 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 615 [2018-09-26 21:18:41,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:41,303 INFO L225 Difference]: With dead ends: 641 [2018-09-26 21:18:41,303 INFO L226 Difference]: Without dead ends: 639 [2018-09-26 21:18:41,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 615 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:18:41,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2018-09-26 21:18:41,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 628. [2018-09-26 21:18:41,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2018-09-26 21:18:41,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 680 transitions. [2018-09-26 21:18:41,643 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 680 transitions. Word has length 615 [2018-09-26 21:18:41,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:41,644 INFO L480 AbstractCegarLoop]: Abstraction has 628 states and 680 transitions. [2018-09-26 21:18:41,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-26 21:18:41,644 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 680 transitions. [2018-09-26 21:18:41,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2018-09-26 21:18:41,646 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:41,647 INFO L375 BasicCegarLoop]: trace histogram [520, 52, 52, 1, 1, 1] [2018-09-26 21:18:41,647 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:41,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:41,647 INFO L82 PathProgramCache]: Analyzing trace with hash 717921803, now seen corresponding path program 55 times [2018-09-26 21:18:41,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:41,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:41,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:41,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:41,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 164684 backedges. 0 proven. 161824 refuted. 0 times theorem prover too weak. 2860 trivial. 0 not checked. [2018-09-26 21:18:43,049 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:43,049 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 [2018-09-26 21:18:43,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:18:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:43,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:43,644 INFO L134 CoverageAnalysis]: Checked inductivity of 164684 backedges. 0 proven. 161824 refuted. 0 times theorem prover too weak. 2860 trivial. 0 not checked. [2018-09-26 21:18:43,665 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:43,665 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-26 21:18:43,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-26 21:18:43,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-26 21:18:43,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:18:43,667 INFO L87 Difference]: Start difference. First operand 628 states and 680 transitions. Second operand 55 states. [2018-09-26 21:18:44,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:44,311 INFO L93 Difference]: Finished difference Result 653 states and 707 transitions. [2018-09-26 21:18:44,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:18:44,312 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 627 [2018-09-26 21:18:44,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:44,314 INFO L225 Difference]: With dead ends: 653 [2018-09-26 21:18:44,314 INFO L226 Difference]: Without dead ends: 651 [2018-09-26 21:18:44,314 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 [2018-09-26 21:18:44,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2018-09-26 21:18:44,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 640. [2018-09-26 21:18:44,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 640 states. [2018-09-26 21:18:44,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 693 transitions. [2018-09-26 21:18:44,706 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 693 transitions. Word has length 627 [2018-09-26 21:18:44,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:44,706 INFO L480 AbstractCegarLoop]: Abstraction has 640 states and 693 transitions. [2018-09-26 21:18:44,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-26 21:18:44,706 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 693 transitions. [2018-09-26 21:18:44,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2018-09-26 21:18:44,709 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:44,710 INFO L375 BasicCegarLoop]: trace histogram [530, 53, 53, 1, 1, 1] [2018-09-26 21:18:44,710 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:44,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:44,710 INFO L82 PathProgramCache]: Analyzing trace with hash 998123861, now seen corresponding path program 56 times [2018-09-26 21:18:44,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:44,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:44,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:44,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:18:44,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:44,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:46,202 INFO L134 CoverageAnalysis]: Checked inductivity of 171084 backedges. 0 proven. 168169 refuted. 0 times theorem prover too weak. 2915 trivial. 0 not checked. [2018-09-26 21:18:46,202 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:46,202 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 [2018-09-26 21:18:46,210 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:18:46,548 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:18:46,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:46,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:46,826 INFO L134 CoverageAnalysis]: Checked inductivity of 171084 backedges. 0 proven. 168169 refuted. 0 times theorem prover too weak. 2915 trivial. 0 not checked. [2018-09-26 21:18:46,847 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:46,848 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-26 21:18:46,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-26 21:18:46,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-26 21:18:46,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:18:46,849 INFO L87 Difference]: Start difference. First operand 640 states and 693 transitions. Second operand 56 states. [2018-09-26 21:18:47,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:47,598 INFO L93 Difference]: Finished difference Result 665 states and 720 transitions. [2018-09-26 21:18:47,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-26 21:18:47,598 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 639 [2018-09-26 21:18:47,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:47,600 INFO L225 Difference]: With dead ends: 665 [2018-09-26 21:18:47,600 INFO L226 Difference]: Without dead ends: 663 [2018-09-26 21:18:47,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 639 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:18:47,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2018-09-26 21:18:47,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 652. [2018-09-26 21:18:47,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2018-09-26 21:18:47,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 706 transitions. [2018-09-26 21:18:47,999 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 706 transitions. Word has length 639 [2018-09-26 21:18:48,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:48,000 INFO L480 AbstractCegarLoop]: Abstraction has 652 states and 706 transitions. [2018-09-26 21:18:48,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-26 21:18:48,000 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 706 transitions. [2018-09-26 21:18:48,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2018-09-26 21:18:48,003 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:48,003 INFO L375 BasicCegarLoop]: trace histogram [540, 54, 54, 1, 1, 1] [2018-09-26 21:18:48,003 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:48,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:48,004 INFO L82 PathProgramCache]: Analyzing trace with hash -300345953, now seen corresponding path program 57 times [2018-09-26 21:18:48,004 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:48,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:48,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:48,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:48,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:49,493 INFO L134 CoverageAnalysis]: Checked inductivity of 177606 backedges. 0 proven. 174636 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-09-26 21:18:49,493 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:49,493 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 [2018-09-26 21:18:49,525 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:18:51,109 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 325 check-sat command(s) [2018-09-26 21:18:51,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:51,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:51,426 INFO L134 CoverageAnalysis]: Checked inductivity of 177606 backedges. 0 proven. 174636 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-09-26 21:18:51,448 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:51,448 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-26 21:18:51,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-26 21:18:51,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-26 21:18:51,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-26 21:18:51,449 INFO L87 Difference]: Start difference. First operand 652 states and 706 transitions. Second operand 57 states. [2018-09-26 21:18:52,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:52,207 INFO L93 Difference]: Finished difference Result 677 states and 733 transitions. [2018-09-26 21:18:52,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-26 21:18:52,208 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 651 [2018-09-26 21:18:52,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:52,210 INFO L225 Difference]: With dead ends: 677 [2018-09-26 21:18:52,210 INFO L226 Difference]: Without dead ends: 675 [2018-09-26 21:18:52,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 651 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-26 21:18:52,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2018-09-26 21:18:52,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 664. [2018-09-26 21:18:52,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664 states. [2018-09-26 21:18:52,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 719 transitions. [2018-09-26 21:18:52,634 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 719 transitions. Word has length 651 [2018-09-26 21:18:52,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:52,634 INFO L480 AbstractCegarLoop]: Abstraction has 664 states and 719 transitions. [2018-09-26 21:18:52,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-26 21:18:52,635 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 719 transitions. [2018-09-26 21:18:52,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2018-09-26 21:18:52,638 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:52,638 INFO L375 BasicCegarLoop]: trace histogram [550, 55, 55, 1, 1, 1] [2018-09-26 21:18:52,638 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:52,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:52,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1167188713, now seen corresponding path program 58 times [2018-09-26 21:18:52,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:52,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:52,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:52,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:52,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:52,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:54,195 INFO L134 CoverageAnalysis]: Checked inductivity of 184250 backedges. 0 proven. 181225 refuted. 0 times theorem prover too weak. 3025 trivial. 0 not checked. [2018-09-26 21:18:54,196 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:54,196 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 [2018-09-26 21:18:54,207 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:18:54,604 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:18:54,604 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:54,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:54,938 INFO L134 CoverageAnalysis]: Checked inductivity of 184250 backedges. 0 proven. 181225 refuted. 0 times theorem prover too weak. 3025 trivial. 0 not checked. [2018-09-26 21:18:54,960 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:54,960 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-26 21:18:54,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-26 21:18:54,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-26 21:18:54,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:18:54,961 INFO L87 Difference]: Start difference. First operand 664 states and 719 transitions. Second operand 58 states. [2018-09-26 21:18:55,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:55,784 INFO L93 Difference]: Finished difference Result 689 states and 746 transitions. [2018-09-26 21:18:55,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-26 21:18:55,784 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 663 [2018-09-26 21:18:55,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:55,786 INFO L225 Difference]: With dead ends: 689 [2018-09-26 21:18:55,787 INFO L226 Difference]: Without dead ends: 687 [2018-09-26 21:18:55,787 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 [2018-09-26 21:18:55,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2018-09-26 21:18:56,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 676. [2018-09-26 21:18:56,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 676 states. [2018-09-26 21:18:56,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 732 transitions. [2018-09-26 21:18:56,228 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 732 transitions. Word has length 663 [2018-09-26 21:18:56,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:56,229 INFO L480 AbstractCegarLoop]: Abstraction has 676 states and 732 transitions. [2018-09-26 21:18:56,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-26 21:18:56,229 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 732 transitions. [2018-09-26 21:18:56,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 676 [2018-09-26 21:18:56,233 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:56,233 INFO L375 BasicCegarLoop]: trace histogram [560, 56, 56, 1, 1, 1] [2018-09-26 21:18:56,234 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:56,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:56,234 INFO L82 PathProgramCache]: Analyzing trace with hash 119476531, now seen corresponding path program 59 times [2018-09-26 21:18:56,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:56,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:56,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:56,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:56,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:56,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 191016 backedges. 0 proven. 187936 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-09-26 21:18:57,970 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:57,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:18:57,977 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:18:59,654 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 337 check-sat command(s) [2018-09-26 21:18:59,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:59,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:59,985 INFO L134 CoverageAnalysis]: Checked inductivity of 191016 backedges. 0 proven. 187936 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-09-26 21:19:00,008 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:00,008 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-26 21:19:00,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-26 21:19:00,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-26 21:19:00,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:19:00,009 INFO L87 Difference]: Start difference. First operand 676 states and 732 transitions. Second operand 59 states. [2018-09-26 21:19:00,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:00,716 INFO L93 Difference]: Finished difference Result 701 states and 759 transitions. [2018-09-26 21:19:00,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-26 21:19:00,717 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 675 [2018-09-26 21:19:00,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:00,719 INFO L225 Difference]: With dead ends: 701 [2018-09-26 21:19:00,719 INFO L226 Difference]: Without dead ends: 699 [2018-09-26 21:19:00,719 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 [2018-09-26 21:19:00,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2018-09-26 21:19:01,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 688. [2018-09-26 21:19:01,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 688 states. [2018-09-26 21:19:01,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 745 transitions. [2018-09-26 21:19:01,178 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 745 transitions. Word has length 675 [2018-09-26 21:19:01,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:01,178 INFO L480 AbstractCegarLoop]: Abstraction has 688 states and 745 transitions. [2018-09-26 21:19:01,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-26 21:19:01,178 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 745 transitions. [2018-09-26 21:19:01,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2018-09-26 21:19:01,182 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:01,182 INFO L375 BasicCegarLoop]: trace histogram [570, 57, 57, 1, 1, 1] [2018-09-26 21:19:01,182 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:01,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:01,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1513562237, now seen corresponding path program 60 times [2018-09-26 21:19:01,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:01,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:01,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:01,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:01,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:02,793 INFO L134 CoverageAnalysis]: Checked inductivity of 197904 backedges. 0 proven. 194769 refuted. 0 times theorem prover too weak. 3135 trivial. 0 not checked. [2018-09-26 21:19:02,794 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:02,794 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:19:02,801 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:19:04,557 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 339 check-sat command(s) [2018-09-26 21:19:04,557 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:04,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:04,924 INFO L134 CoverageAnalysis]: Checked inductivity of 197904 backedges. 0 proven. 194769 refuted. 0 times theorem prover too weak. 3135 trivial. 0 not checked. [2018-09-26 21:19:04,946 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:04,946 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-26 21:19:04,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-26 21:19:04,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-26 21:19:04,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:19:04,947 INFO L87 Difference]: Start difference. First operand 688 states and 745 transitions. Second operand 60 states. [2018-09-26 21:19:05,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:05,820 INFO L93 Difference]: Finished difference Result 713 states and 772 transitions. [2018-09-26 21:19:05,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-26 21:19:05,820 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 687 [2018-09-26 21:19:05,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:05,822 INFO L225 Difference]: With dead ends: 713 [2018-09-26 21:19:05,822 INFO L226 Difference]: Without dead ends: 711 [2018-09-26 21:19:05,823 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 687 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:19:05,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2018-09-26 21:19:06,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 700. [2018-09-26 21:19:06,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2018-09-26 21:19:06,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 758 transitions. [2018-09-26 21:19:06,249 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 758 transitions. Word has length 687 [2018-09-26 21:19:06,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:06,249 INFO L480 AbstractCegarLoop]: Abstraction has 700 states and 758 transitions. [2018-09-26 21:19:06,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-26 21:19:06,249 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 758 transitions. [2018-09-26 21:19:06,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 700 [2018-09-26 21:19:06,252 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:06,252 INFO L375 BasicCegarLoop]: trace histogram [580, 58, 58, 1, 1, 1] [2018-09-26 21:19:06,253 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:06,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:06,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1754304711, now seen corresponding path program 61 times [2018-09-26 21:19:06,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:06,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:06,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:06,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:06,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 204914 backedges. 0 proven. 201724 refuted. 0 times theorem prover too weak. 3190 trivial. 0 not checked. [2018-09-26 21:19:08,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:08,091 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 [2018-09-26 21:19:08,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:19:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:08,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:08,861 INFO L134 CoverageAnalysis]: Checked inductivity of 204914 backedges. 0 proven. 201724 refuted. 0 times theorem prover too weak. 3190 trivial. 0 not checked. [2018-09-26 21:19:08,882 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:08,883 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-26 21:19:08,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-26 21:19:08,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-26 21:19:08,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-26 21:19:08,884 INFO L87 Difference]: Start difference. First operand 700 states and 758 transitions. Second operand 61 states. [2018-09-26 21:19:09,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:09,747 INFO L93 Difference]: Finished difference Result 725 states and 785 transitions. [2018-09-26 21:19:09,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-26 21:19:09,747 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 699 [2018-09-26 21:19:09,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:09,749 INFO L225 Difference]: With dead ends: 725 [2018-09-26 21:19:09,749 INFO L226 Difference]: Without dead ends: 723 [2018-09-26 21:19:09,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 758 GetRequests, 699 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-26 21:19:09,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2018-09-26 21:19:10,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 712. [2018-09-26 21:19:10,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2018-09-26 21:19:10,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 771 transitions. [2018-09-26 21:19:10,229 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 771 transitions. Word has length 699 [2018-09-26 21:19:10,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:10,229 INFO L480 AbstractCegarLoop]: Abstraction has 712 states and 771 transitions. [2018-09-26 21:19:10,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-26 21:19:10,230 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 771 transitions. [2018-09-26 21:19:10,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 712 [2018-09-26 21:19:10,233 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:10,233 INFO L375 BasicCegarLoop]: trace histogram [590, 59, 59, 1, 1, 1] [2018-09-26 21:19:10,233 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:10,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:10,234 INFO L82 PathProgramCache]: Analyzing trace with hash -31333871, now seen corresponding path program 62 times [2018-09-26 21:19:10,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:10,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:10,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:10,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:19:10,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:12,019 INFO L134 CoverageAnalysis]: Checked inductivity of 212046 backedges. 0 proven. 208801 refuted. 0 times theorem prover too weak. 3245 trivial. 0 not checked. [2018-09-26 21:19:12,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:12,019 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 [2018-09-26 21:19:12,027 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:19:12,409 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:19:12,410 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:12,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:12,811 INFO L134 CoverageAnalysis]: Checked inductivity of 212046 backedges. 0 proven. 208801 refuted. 0 times theorem prover too weak. 3245 trivial. 0 not checked. [2018-09-26 21:19:12,832 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:12,833 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-26 21:19:12,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-26 21:19:12,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-26 21:19:12,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:19:12,834 INFO L87 Difference]: Start difference. First operand 712 states and 771 transitions. Second operand 62 states. [2018-09-26 21:19:13,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:13,756 INFO L93 Difference]: Finished difference Result 737 states and 798 transitions. [2018-09-26 21:19:13,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-26 21:19:13,757 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 711 [2018-09-26 21:19:13,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:13,759 INFO L225 Difference]: With dead ends: 737 [2018-09-26 21:19:13,759 INFO L226 Difference]: Without dead ends: 735 [2018-09-26 21:19:13,760 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 711 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:19:13,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2018-09-26 21:19:14,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 724. [2018-09-26 21:19:14,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 724 states. [2018-09-26 21:19:14,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 784 transitions. [2018-09-26 21:19:14,272 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 784 transitions. Word has length 711 [2018-09-26 21:19:14,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:14,273 INFO L480 AbstractCegarLoop]: Abstraction has 724 states and 784 transitions. [2018-09-26 21:19:14,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-26 21:19:14,273 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 784 transitions. [2018-09-26 21:19:14,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2018-09-26 21:19:14,276 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:14,277 INFO L375 BasicCegarLoop]: trace histogram [600, 60, 60, 1, 1, 1] [2018-09-26 21:19:14,277 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:14,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:14,277 INFO L82 PathProgramCache]: Analyzing trace with hash 690066523, now seen corresponding path program 63 times [2018-09-26 21:19:14,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:14,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:14,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:14,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:14,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:14,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 219300 backedges. 0 proven. 216000 refuted. 0 times theorem prover too weak. 3300 trivial. 0 not checked. [2018-09-26 21:19:16,368 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:16,368 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 [2018-09-26 21:19:16,377 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:19:18,311 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 361 check-sat command(s) [2018-09-26 21:19:18,311 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:18,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:18,676 INFO L134 CoverageAnalysis]: Checked inductivity of 219300 backedges. 0 proven. 216000 refuted. 0 times theorem prover too weak. 3300 trivial. 0 not checked. [2018-09-26 21:19:18,697 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:18,698 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-26 21:19:18,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-26 21:19:18,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-26 21:19:18,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-26 21:19:18,699 INFO L87 Difference]: Start difference. First operand 724 states and 784 transitions. Second operand 63 states. [2018-09-26 21:19:19,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:19,924 INFO L93 Difference]: Finished difference Result 749 states and 811 transitions. [2018-09-26 21:19:19,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-26 21:19:19,925 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 723 [2018-09-26 21:19:19,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:19,928 INFO L225 Difference]: With dead ends: 749 [2018-09-26 21:19:19,929 INFO L226 Difference]: Without dead ends: 747 [2018-09-26 21:19:19,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 723 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-26 21:19:19,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2018-09-26 21:19:20,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 736. [2018-09-26 21:19:20,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2018-09-26 21:19:20,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 797 transitions. [2018-09-26 21:19:20,519 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 797 transitions. Word has length 723 [2018-09-26 21:19:20,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:20,520 INFO L480 AbstractCegarLoop]: Abstraction has 736 states and 797 transitions. [2018-09-26 21:19:20,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-26 21:19:20,520 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 797 transitions. [2018-09-26 21:19:20,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 736 [2018-09-26 21:19:20,523 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:20,524 INFO L375 BasicCegarLoop]: trace histogram [610, 61, 61, 1, 1, 1] [2018-09-26 21:19:20,524 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:20,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:20,524 INFO L82 PathProgramCache]: Analyzing trace with hash -637130843, now seen corresponding path program 64 times [2018-09-26 21:19:20,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:20,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:20,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:20,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:20,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:20,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:22,381 INFO L134 CoverageAnalysis]: Checked inductivity of 226676 backedges. 0 proven. 223321 refuted. 0 times theorem prover too weak. 3355 trivial. 0 not checked. [2018-09-26 21:19:22,382 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:22,382 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 [2018-09-26 21:19:22,390 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:19:22,792 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:19:22,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:22,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:23,185 INFO L134 CoverageAnalysis]: Checked inductivity of 226676 backedges. 0 proven. 223321 refuted. 0 times theorem prover too weak. 3355 trivial. 0 not checked. [2018-09-26 21:19:23,206 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:23,207 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-26 21:19:23,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-26 21:19:23,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-26 21:19:23,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-26 21:19:23,208 INFO L87 Difference]: Start difference. First operand 736 states and 797 transitions. Second operand 64 states. [2018-09-26 21:19:24,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:24,168 INFO L93 Difference]: Finished difference Result 761 states and 824 transitions. [2018-09-26 21:19:24,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-26 21:19:24,168 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 735 [2018-09-26 21:19:24,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:24,171 INFO L225 Difference]: With dead ends: 761 [2018-09-26 21:19:24,171 INFO L226 Difference]: Without dead ends: 759 [2018-09-26 21:19:24,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 735 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-26 21:19:24,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2018-09-26 21:19:24,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 748. [2018-09-26 21:19:24,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 748 states. [2018-09-26 21:19:24,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 810 transitions. [2018-09-26 21:19:24,670 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 810 transitions. Word has length 735 [2018-09-26 21:19:24,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:24,670 INFO L480 AbstractCegarLoop]: Abstraction has 748 states and 810 transitions. [2018-09-26 21:19:24,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-26 21:19:24,670 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 810 transitions. [2018-09-26 21:19:24,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 748 [2018-09-26 21:19:24,673 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:24,674 INFO L375 BasicCegarLoop]: trace histogram [620, 62, 62, 1, 1, 1] [2018-09-26 21:19:24,674 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:24,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:24,674 INFO L82 PathProgramCache]: Analyzing trace with hash -2088363025, now seen corresponding path program 65 times [2018-09-26 21:19:24,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:24,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:24,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:24,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:24,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:24,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:26,907 INFO L134 CoverageAnalysis]: Checked inductivity of 234174 backedges. 0 proven. 230764 refuted. 0 times theorem prover too weak. 3410 trivial. 0 not checked. [2018-09-26 21:19:26,908 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:26,908 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 [2018-09-26 21:19:26,920 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:19:29,128 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 373 check-sat command(s) [2018-09-26 21:19:29,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:29,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 234174 backedges. 0 proven. 230764 refuted. 0 times theorem prover too weak. 3410 trivial. 0 not checked. [2018-09-26 21:19:29,526 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:29,526 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-26 21:19:29,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-26 21:19:29,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-26 21:19:29,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-26 21:19:29,527 INFO L87 Difference]: Start difference. First operand 748 states and 810 transitions. Second operand 65 states. [2018-09-26 21:19:30,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:30,546 INFO L93 Difference]: Finished difference Result 773 states and 837 transitions. [2018-09-26 21:19:30,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-26 21:19:30,547 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 747 [2018-09-26 21:19:30,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:30,550 INFO L225 Difference]: With dead ends: 773 [2018-09-26 21:19:30,550 INFO L226 Difference]: Without dead ends: 771 [2018-09-26 21:19:30,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 810 GetRequests, 747 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-26 21:19:30,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2018-09-26 21:19:31,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 760. [2018-09-26 21:19:31,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 760 states. [2018-09-26 21:19:31,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 823 transitions. [2018-09-26 21:19:31,085 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 823 transitions. Word has length 747 [2018-09-26 21:19:31,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:31,085 INFO L480 AbstractCegarLoop]: Abstraction has 760 states and 823 transitions. [2018-09-26 21:19:31,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-26 21:19:31,086 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 823 transitions. [2018-09-26 21:19:31,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 760 [2018-09-26 21:19:31,089 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:31,089 INFO L375 BasicCegarLoop]: trace histogram [630, 63, 63, 1, 1, 1] [2018-09-26 21:19:31,090 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:31,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:31,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1164447431, now seen corresponding path program 66 times [2018-09-26 21:19:31,090 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:31,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:31,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:31,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:31,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:31,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 241794 backedges. 0 proven. 238329 refuted. 0 times theorem prover too weak. 3465 trivial. 0 not checked. [2018-09-26 21:19:33,131 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:33,131 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 [2018-09-26 21:19:33,138 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:19:35,258 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 374 check-sat command(s) [2018-09-26 21:19:35,258 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:35,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:35,604 INFO L134 CoverageAnalysis]: Checked inductivity of 241794 backedges. 0 proven. 238329 refuted. 0 times theorem prover too weak. 3465 trivial. 0 not checked. [2018-09-26 21:19:35,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:35,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-26 21:19:35,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-26 21:19:35,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-26 21:19:35,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-26 21:19:35,628 INFO L87 Difference]: Start difference. First operand 760 states and 823 transitions. Second operand 66 states. [2018-09-26 21:19:36,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:36,656 INFO L93 Difference]: Finished difference Result 785 states and 850 transitions. [2018-09-26 21:19:36,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-26 21:19:36,657 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 759 [2018-09-26 21:19:36,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:36,659 INFO L225 Difference]: With dead ends: 785 [2018-09-26 21:19:36,660 INFO L226 Difference]: Without dead ends: 783 [2018-09-26 21:19:36,660 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 823 GetRequests, 759 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-26 21:19:36,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2018-09-26 21:19:37,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 772. [2018-09-26 21:19:37,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 772 states. [2018-09-26 21:19:37,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 836 transitions. [2018-09-26 21:19:37,260 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 836 transitions. Word has length 759 [2018-09-26 21:19:37,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:37,260 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 836 transitions. [2018-09-26 21:19:37,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-26 21:19:37,261 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 836 transitions. [2018-09-26 21:19:37,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2018-09-26 21:19:37,265 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:37,265 INFO L375 BasicCegarLoop]: trace histogram [640, 64, 64, 1, 1, 1] [2018-09-26 21:19:37,265 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:37,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:37,266 INFO L82 PathProgramCache]: Analyzing trace with hash -697161853, now seen corresponding path program 67 times [2018-09-26 21:19:37,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:37,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:37,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:37,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:37,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:37,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:39,293 INFO L134 CoverageAnalysis]: Checked inductivity of 249536 backedges. 0 proven. 246016 refuted. 0 times theorem prover too weak. 3520 trivial. 0 not checked. [2018-09-26 21:19:39,294 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:39,294 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:19:39,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:19:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:39,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:40,133 INFO L134 CoverageAnalysis]: Checked inductivity of 249536 backedges. 0 proven. 246016 refuted. 0 times theorem prover too weak. 3520 trivial. 0 not checked. [2018-09-26 21:19:40,154 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:40,155 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-26 21:19:40,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-26 21:19:40,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-26 21:19:40,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-26 21:19:40,156 INFO L87 Difference]: Start difference. First operand 772 states and 836 transitions. Second operand 67 states. [2018-09-26 21:19:41,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:41,186 INFO L93 Difference]: Finished difference Result 797 states and 863 transitions. [2018-09-26 21:19:41,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-26 21:19:41,186 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 771 [2018-09-26 21:19:41,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:41,189 INFO L225 Difference]: With dead ends: 797 [2018-09-26 21:19:41,189 INFO L226 Difference]: Without dead ends: 795 [2018-09-26 21:19:41,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 836 GetRequests, 771 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-26 21:19:41,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2018-09-26 21:19:41,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 784. [2018-09-26 21:19:41,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2018-09-26 21:19:41,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 849 transitions. [2018-09-26 21:19:41,811 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 849 transitions. Word has length 771 [2018-09-26 21:19:41,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:41,811 INFO L480 AbstractCegarLoop]: Abstraction has 784 states and 849 transitions. [2018-09-26 21:19:41,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-26 21:19:41,812 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 849 transitions. [2018-09-26 21:19:41,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2018-09-26 21:19:41,816 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:41,816 INFO L375 BasicCegarLoop]: trace histogram [650, 65, 65, 1, 1, 1] [2018-09-26 21:19:41,816 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:41,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:41,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1869922611, now seen corresponding path program 68 times [2018-09-26 21:19:41,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:41,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:41,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:41,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:19:41,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:41,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:43,896 INFO L134 CoverageAnalysis]: Checked inductivity of 257400 backedges. 0 proven. 253825 refuted. 0 times theorem prover too weak. 3575 trivial. 0 not checked. [2018-09-26 21:19:43,896 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:43,896 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:19:43,904 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:19:44,330 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:19:44,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:44,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:44,702 INFO L134 CoverageAnalysis]: Checked inductivity of 257400 backedges. 0 proven. 253825 refuted. 0 times theorem prover too weak. 3575 trivial. 0 not checked. [2018-09-26 21:19:44,724 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:44,725 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-26 21:19:44,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-26 21:19:44,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-26 21:19:44,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:19:44,726 INFO L87 Difference]: Start difference. First operand 784 states and 849 transitions. Second operand 68 states. [2018-09-26 21:19:45,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:45,888 INFO L93 Difference]: Finished difference Result 809 states and 876 transitions. [2018-09-26 21:19:45,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-26 21:19:45,888 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 783 [2018-09-26 21:19:45,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:45,891 INFO L225 Difference]: With dead ends: 809 [2018-09-26 21:19:45,892 INFO L226 Difference]: Without dead ends: 807 [2018-09-26 21:19:45,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 783 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:19:45,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2018-09-26 21:19:46,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 796. [2018-09-26 21:19:46,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2018-09-26 21:19:46,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 862 transitions. [2018-09-26 21:19:46,498 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 862 transitions. Word has length 783 [2018-09-26 21:19:46,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:46,498 INFO L480 AbstractCegarLoop]: Abstraction has 796 states and 862 transitions. [2018-09-26 21:19:46,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-26 21:19:46,498 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 862 transitions. [2018-09-26 21:19:46,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2018-09-26 21:19:46,502 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:46,502 INFO L375 BasicCegarLoop]: trace histogram [660, 66, 66, 1, 1, 1] [2018-09-26 21:19:46,503 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:46,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:46,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1533429993, now seen corresponding path program 69 times [2018-09-26 21:19:46,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:46,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:46,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:46,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:46,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:46,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:48,643 INFO L134 CoverageAnalysis]: Checked inductivity of 265386 backedges. 0 proven. 261756 refuted. 0 times theorem prover too weak. 3630 trivial. 0 not checked. [2018-09-26 21:19:48,643 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:48,643 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 [2018-09-26 21:19:48,650 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:19:51,020 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 397 check-sat command(s) [2018-09-26 21:19:51,020 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:51,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 265386 backedges. 0 proven. 261756 refuted. 0 times theorem prover too weak. 3630 trivial. 0 not checked. [2018-09-26 21:19:51,505 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:51,506 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-26 21:19:51,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-26 21:19:51,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-26 21:19:51,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-26 21:19:51,507 INFO L87 Difference]: Start difference. First operand 796 states and 862 transitions. Second operand 69 states. [2018-09-26 21:19:52,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:52,631 INFO L93 Difference]: Finished difference Result 821 states and 889 transitions. [2018-09-26 21:19:52,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-26 21:19:52,632 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 795 [2018-09-26 21:19:52,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:52,634 INFO L225 Difference]: With dead ends: 821 [2018-09-26 21:19:52,634 INFO L226 Difference]: Without dead ends: 819 [2018-09-26 21:19:52,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 862 GetRequests, 795 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-26 21:19:52,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2018-09-26 21:19:53,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 808. [2018-09-26 21:19:53,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 808 states. [2018-09-26 21:19:53,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 875 transitions. [2018-09-26 21:19:53,235 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 875 transitions. Word has length 795 [2018-09-26 21:19:53,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:53,235 INFO L480 AbstractCegarLoop]: Abstraction has 808 states and 875 transitions. [2018-09-26 21:19:53,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-26 21:19:53,235 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 875 transitions. [2018-09-26 21:19:53,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2018-09-26 21:19:53,240 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:53,240 INFO L375 BasicCegarLoop]: trace histogram [670, 67, 67, 1, 1, 1] [2018-09-26 21:19:53,240 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:53,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:53,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1888751713, now seen corresponding path program 70 times [2018-09-26 21:19:53,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:53,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:53,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:53,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:53,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:55,422 INFO L134 CoverageAnalysis]: Checked inductivity of 273494 backedges. 0 proven. 269809 refuted. 0 times theorem prover too weak. 3685 trivial. 0 not checked. [2018-09-26 21:19:55,422 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:55,422 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 [2018-09-26 21:19:55,429 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:19:55,867 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:19:55,867 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:55,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:56,327 INFO L134 CoverageAnalysis]: Checked inductivity of 273494 backedges. 0 proven. 269809 refuted. 0 times theorem prover too weak. 3685 trivial. 0 not checked. [2018-09-26 21:19:56,348 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:56,348 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-26 21:19:56,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-26 21:19:56,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-26 21:19:56,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-26 21:19:56,350 INFO L87 Difference]: Start difference. First operand 808 states and 875 transitions. Second operand 70 states. [2018-09-26 21:19:57,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:57,560 INFO L93 Difference]: Finished difference Result 833 states and 902 transitions. [2018-09-26 21:19:57,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-26 21:19:57,560 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 807 [2018-09-26 21:19:57,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:57,563 INFO L225 Difference]: With dead ends: 833 [2018-09-26 21:19:57,563 INFO L226 Difference]: Without dead ends: 831 [2018-09-26 21:19:57,564 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 [2018-09-26 21:19:57,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2018-09-26 21:19:58,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 820. [2018-09-26 21:19:58,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 820 states. [2018-09-26 21:19:58,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 888 transitions. [2018-09-26 21:19:58,232 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 888 transitions. Word has length 807 [2018-09-26 21:19:58,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:58,232 INFO L480 AbstractCegarLoop]: Abstraction has 820 states and 888 transitions. [2018-09-26 21:19:58,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-26 21:19:58,233 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 888 transitions. [2018-09-26 21:19:58,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2018-09-26 21:19:58,237 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:58,237 INFO L375 BasicCegarLoop]: trace histogram [680, 68, 68, 1, 1, 1] [2018-09-26 21:19:58,237 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:58,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:58,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1800353109, now seen corresponding path program 71 times [2018-09-26 21:19:58,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:58,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:58,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:58,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:58,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:58,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:00,515 INFO L134 CoverageAnalysis]: Checked inductivity of 281724 backedges. 0 proven. 277984 refuted. 0 times theorem prover too weak. 3740 trivial. 0 not checked. [2018-09-26 21:20:00,516 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:00,516 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 [2018-09-26 21:20:00,523 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:20:03,044 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 409 check-sat command(s) [2018-09-26 21:20:03,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:03,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:03,574 INFO L134 CoverageAnalysis]: Checked inductivity of 281724 backedges. 0 proven. 277984 refuted. 0 times theorem prover too weak. 3740 trivial. 0 not checked. [2018-09-26 21:20:03,598 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:03,598 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-26 21:20:03,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-26 21:20:03,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-26 21:20:03,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-26 21:20:03,599 INFO L87 Difference]: Start difference. First operand 820 states and 888 transitions. Second operand 71 states. [2018-09-26 21:20:04,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:04,741 INFO L93 Difference]: Finished difference Result 845 states and 915 transitions. [2018-09-26 21:20:04,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-26 21:20:04,742 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 819 [2018-09-26 21:20:04,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:04,745 INFO L225 Difference]: With dead ends: 845 [2018-09-26 21:20:04,745 INFO L226 Difference]: Without dead ends: 843 [2018-09-26 21:20:04,745 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 [2018-09-26 21:20:04,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2018-09-26 21:20:05,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 832. [2018-09-26 21:20:05,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 832 states. [2018-09-26 21:20:05,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 901 transitions. [2018-09-26 21:20:05,466 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 901 transitions. Word has length 819 [2018-09-26 21:20:05,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:05,466 INFO L480 AbstractCegarLoop]: Abstraction has 832 states and 901 transitions. [2018-09-26 21:20:05,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-26 21:20:05,466 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 901 transitions. [2018-09-26 21:20:05,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 832 [2018-09-26 21:20:05,471 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:05,472 INFO L375 BasicCegarLoop]: trace histogram [690, 69, 69, 1, 1, 1] [2018-09-26 21:20:05,472 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:05,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:05,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1822005771, now seen corresponding path program 72 times [2018-09-26 21:20:05,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:05,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:05,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:05,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:05,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:08,164 INFO L134 CoverageAnalysis]: Checked inductivity of 290076 backedges. 0 proven. 286281 refuted. 0 times theorem prover too weak. 3795 trivial. 0 not checked. [2018-09-26 21:20:08,164 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:08,164 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 [2018-09-26 21:20:08,171 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:20:10,763 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 411 check-sat command(s) [2018-09-26 21:20:10,763 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:10,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:11,229 INFO L134 CoverageAnalysis]: Checked inductivity of 290076 backedges. 0 proven. 286281 refuted. 0 times theorem prover too weak. 3795 trivial. 0 not checked. [2018-09-26 21:20:11,251 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:11,251 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-26 21:20:11,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-26 21:20:11,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-26 21:20:11,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-26 21:20:11,253 INFO L87 Difference]: Start difference. First operand 832 states and 901 transitions. Second operand 72 states. [2018-09-26 21:20:12,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:12,415 INFO L93 Difference]: Finished difference Result 857 states and 928 transitions. [2018-09-26 21:20:12,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-26 21:20:12,415 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 831 [2018-09-26 21:20:12,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:12,417 INFO L225 Difference]: With dead ends: 857 [2018-09-26 21:20:12,417 INFO L226 Difference]: Without dead ends: 855 [2018-09-26 21:20:12,418 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 [2018-09-26 21:20:12,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2018-09-26 21:20:13,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 844. [2018-09-26 21:20:13,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2018-09-26 21:20:13,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 914 transitions. [2018-09-26 21:20:13,091 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 914 transitions. Word has length 831 [2018-09-26 21:20:13,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:13,091 INFO L480 AbstractCegarLoop]: Abstraction has 844 states and 914 transitions. [2018-09-26 21:20:13,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-26 21:20:13,091 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 914 transitions. [2018-09-26 21:20:13,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 844 [2018-09-26 21:20:13,098 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:13,098 INFO L375 BasicCegarLoop]: trace histogram [700, 70, 70, 1, 1, 1] [2018-09-26 21:20:13,098 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:13,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:13,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1902862911, now seen corresponding path program 73 times [2018-09-26 21:20:13,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:13,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:13,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:13,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:13,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:13,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:15,485 INFO L134 CoverageAnalysis]: Checked inductivity of 298550 backedges. 0 proven. 294700 refuted. 0 times theorem prover too weak. 3850 trivial. 0 not checked. [2018-09-26 21:20:15,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:15,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:15,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:15,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:16,458 INFO L134 CoverageAnalysis]: Checked inductivity of 298550 backedges. 0 proven. 294700 refuted. 0 times theorem prover too weak. 3850 trivial. 0 not checked. [2018-09-26 21:20:16,480 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:16,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-26 21:20:16,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-26 21:20:16,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-26 21:20:16,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-26 21:20:16,482 INFO L87 Difference]: Start difference. First operand 844 states and 914 transitions. Second operand 73 states. [2018-09-26 21:20:17,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:17,812 INFO L93 Difference]: Finished difference Result 869 states and 941 transitions. [2018-09-26 21:20:17,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-26 21:20:17,812 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 843 [2018-09-26 21:20:17,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:17,814 INFO L225 Difference]: With dead ends: 869 [2018-09-26 21:20:17,814 INFO L226 Difference]: Without dead ends: 867 [2018-09-26 21:20:17,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 914 GetRequests, 843 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-26 21:20:17,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2018-09-26 21:20:18,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 856. [2018-09-26 21:20:18,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 856 states. [2018-09-26 21:20:18,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 927 transitions. [2018-09-26 21:20:18,545 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 927 transitions. Word has length 843 [2018-09-26 21:20:18,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:18,545 INFO L480 AbstractCegarLoop]: Abstraction has 856 states and 927 transitions. [2018-09-26 21:20:18,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-26 21:20:18,545 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 927 transitions. [2018-09-26 21:20:18,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 856 [2018-09-26 21:20:18,550 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:18,550 INFO L375 BasicCegarLoop]: trace histogram [710, 71, 71, 1, 1, 1] [2018-09-26 21:20:18,550 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:18,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:18,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1438007177, now seen corresponding path program 74 times [2018-09-26 21:20:18,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:18,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:18,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:18,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:18,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:21,024 INFO L134 CoverageAnalysis]: Checked inductivity of 307146 backedges. 0 proven. 303241 refuted. 0 times theorem prover too weak. 3905 trivial. 0 not checked. [2018-09-26 21:20:21,024 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:21,024 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 [2018-09-26 21:20:21,033 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:20:21,492 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:21,492 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:21,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:21,962 INFO L134 CoverageAnalysis]: Checked inductivity of 307146 backedges. 0 proven. 303241 refuted. 0 times theorem prover too weak. 3905 trivial. 0 not checked. [2018-09-26 21:20:21,983 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:21,983 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-26 21:20:21,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-26 21:20:21,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-26 21:20:21,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-26 21:20:21,985 INFO L87 Difference]: Start difference. First operand 856 states and 927 transitions. Second operand 74 states. [2018-09-26 21:20:23,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:23,287 INFO L93 Difference]: Finished difference Result 881 states and 954 transitions. [2018-09-26 21:20:23,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-26 21:20:23,288 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 855 [2018-09-26 21:20:23,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:23,289 INFO L225 Difference]: With dead ends: 881 [2018-09-26 21:20:23,289 INFO L226 Difference]: Without dead ends: 879 [2018-09-26 21:20:23,290 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 [2018-09-26 21:20:23,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2018-09-26 21:20:24,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 868. [2018-09-26 21:20:24,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 868 states. [2018-09-26 21:20:24,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 940 transitions. [2018-09-26 21:20:24,131 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 940 transitions. Word has length 855 [2018-09-26 21:20:24,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:24,131 INFO L480 AbstractCegarLoop]: Abstraction has 868 states and 940 transitions. [2018-09-26 21:20:24,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-26 21:20:24,132 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 940 transitions. [2018-09-26 21:20:24,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 868 [2018-09-26 21:20:24,137 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:24,137 INFO L375 BasicCegarLoop]: trace histogram [720, 72, 72, 1, 1, 1] [2018-09-26 21:20:24,137 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:24,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:24,138 INFO L82 PathProgramCache]: Analyzing trace with hash 696090067, now seen corresponding path program 75 times [2018-09-26 21:20:24,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:24,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:24,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:24,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:24,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:26,595 INFO L134 CoverageAnalysis]: Checked inductivity of 315864 backedges. 0 proven. 311904 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2018-09-26 21:20:26,595 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:26,595 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:26,603 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:20:29,552 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 433 check-sat command(s) [2018-09-26 21:20:29,553 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:29,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:30,108 INFO L134 CoverageAnalysis]: Checked inductivity of 315864 backedges. 0 proven. 311904 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2018-09-26 21:20:30,131 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:30,132 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-26 21:20:30,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-26 21:20:30,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-26 21:20:30,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-26 21:20:30,134 INFO L87 Difference]: Start difference. First operand 868 states and 940 transitions. Second operand 75 states. [2018-09-26 21:20:31,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:31,452 INFO L93 Difference]: Finished difference Result 893 states and 967 transitions. [2018-09-26 21:20:31,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-26 21:20:31,453 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 867 [2018-09-26 21:20:31,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:31,454 INFO L225 Difference]: With dead ends: 893 [2018-09-26 21:20:31,454 INFO L226 Difference]: Without dead ends: 891 [2018-09-26 21:20:31,455 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 940 GetRequests, 867 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-26 21:20:31,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2018-09-26 21:20:32,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 880. [2018-09-26 21:20:32,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2018-09-26 21:20:32,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 953 transitions. [2018-09-26 21:20:32,196 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 953 transitions. Word has length 867 [2018-09-26 21:20:32,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:32,196 INFO L480 AbstractCegarLoop]: Abstraction has 880 states and 953 transitions. [2018-09-26 21:20:32,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-26 21:20:32,197 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 953 transitions. [2018-09-26 21:20:32,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 880 [2018-09-26 21:20:32,201 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:32,202 INFO L375 BasicCegarLoop]: trace histogram [730, 73, 73, 1, 1, 1] [2018-09-26 21:20:32,202 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:32,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:32,202 INFO L82 PathProgramCache]: Analyzing trace with hash 943168797, now seen corresponding path program 76 times [2018-09-26 21:20:32,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:32,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:32,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:32,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:32,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:32,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:34,865 INFO L134 CoverageAnalysis]: Checked inductivity of 324704 backedges. 0 proven. 320689 refuted. 0 times theorem prover too weak. 4015 trivial. 0 not checked. [2018-09-26 21:20:34,865 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:34,865 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:34,872 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:20:35,350 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:20:35,351 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:35,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 324704 backedges. 0 proven. 320689 refuted. 0 times theorem prover too weak. 4015 trivial. 0 not checked. [2018-09-26 21:20:35,896 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:35,896 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-26 21:20:35,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-26 21:20:35,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-26 21:20:35,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-26 21:20:35,898 INFO L87 Difference]: Start difference. First operand 880 states and 953 transitions. Second operand 76 states. [2018-09-26 21:20:37,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:37,145 INFO L93 Difference]: Finished difference Result 905 states and 980 transitions. [2018-09-26 21:20:37,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-26 21:20:37,145 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 879 [2018-09-26 21:20:37,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:37,147 INFO L225 Difference]: With dead ends: 905 [2018-09-26 21:20:37,147 INFO L226 Difference]: Without dead ends: 903 [2018-09-26 21:20:37,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 953 GetRequests, 879 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-26 21:20:37,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2018-09-26 21:20:37,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 892. [2018-09-26 21:20:37,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 892 states. [2018-09-26 21:20:37,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 966 transitions. [2018-09-26 21:20:37,992 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 966 transitions. Word has length 879 [2018-09-26 21:20:37,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:37,992 INFO L480 AbstractCegarLoop]: Abstraction has 892 states and 966 transitions. [2018-09-26 21:20:37,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-26 21:20:37,992 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 966 transitions. [2018-09-26 21:20:37,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 892 [2018-09-26 21:20:37,998 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:37,998 INFO L375 BasicCegarLoop]: trace histogram [740, 74, 74, 1, 1, 1] [2018-09-26 21:20:37,998 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:37,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:37,998 INFO L82 PathProgramCache]: Analyzing trace with hash -811917977, now seen corresponding path program 77 times [2018-09-26 21:20:37,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:37,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:37,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:37,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:37,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:38,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:40,802 INFO L134 CoverageAnalysis]: Checked inductivity of 333666 backedges. 0 proven. 329596 refuted. 0 times theorem prover too weak. 4070 trivial. 0 not checked. [2018-09-26 21:20:40,803 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:40,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:40,809 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:20:43,895 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 445 check-sat command(s) [2018-09-26 21:20:43,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:43,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:44,457 INFO L134 CoverageAnalysis]: Checked inductivity of 333666 backedges. 0 proven. 329596 refuted. 0 times theorem prover too weak. 4070 trivial. 0 not checked. [2018-09-26 21:20:44,481 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:44,481 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-26 21:20:44,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-26 21:20:44,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-26 21:20:44,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-26 21:20:44,482 INFO L87 Difference]: Start difference. First operand 892 states and 966 transitions. Second operand 77 states. [2018-09-26 21:20:45,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:45,872 INFO L93 Difference]: Finished difference Result 917 states and 993 transitions. [2018-09-26 21:20:45,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-26 21:20:45,872 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 891 [2018-09-26 21:20:45,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:45,874 INFO L225 Difference]: With dead ends: 917 [2018-09-26 21:20:45,874 INFO L226 Difference]: Without dead ends: 915 [2018-09-26 21:20:45,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 891 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-26 21:20:45,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2018-09-26 21:20:46,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 904. [2018-09-26 21:20:46,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 904 states. [2018-09-26 21:20:46,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 979 transitions. [2018-09-26 21:20:46,744 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 979 transitions. Word has length 891 [2018-09-26 21:20:46,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:46,745 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 979 transitions. [2018-09-26 21:20:46,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-26 21:20:46,745 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 979 transitions. [2018-09-26 21:20:46,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 904 [2018-09-26 21:20:46,751 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:46,751 INFO L375 BasicCegarLoop]: trace histogram [750, 75, 75, 1, 1, 1] [2018-09-26 21:20:46,751 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:46,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:46,752 INFO L82 PathProgramCache]: Analyzing trace with hash -543261007, now seen corresponding path program 78 times [2018-09-26 21:20:46,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:46,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:46,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:46,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:46,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 342750 backedges. 0 proven. 338625 refuted. 0 times theorem prover too weak. 4125 trivial. 0 not checked. [2018-09-26 21:20:49,790 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:49,790 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 [2018-09-26 21:20:49,798 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:20:52,871 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 446 check-sat command(s) [2018-09-26 21:20:52,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:52,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:53,377 INFO L134 CoverageAnalysis]: Checked inductivity of 342750 backedges. 0 proven. 338625 refuted. 0 times theorem prover too weak. 4125 trivial. 0 not checked. [2018-09-26 21:20:53,400 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:53,400 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-26 21:20:53,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-26 21:20:53,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-26 21:20:53,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-26 21:20:53,401 INFO L87 Difference]: Start difference. First operand 904 states and 979 transitions. Second operand 78 states. [2018-09-26 21:20:54,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:54,755 INFO L93 Difference]: Finished difference Result 929 states and 1006 transitions. [2018-09-26 21:20:54,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-26 21:20:54,756 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 903 [2018-09-26 21:20:54,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:54,757 INFO L225 Difference]: With dead ends: 929 [2018-09-26 21:20:54,757 INFO L226 Difference]: Without dead ends: 927 [2018-09-26 21:20:54,758 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 [2018-09-26 21:20:54,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2018-09-26 21:20:55,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 916. [2018-09-26 21:20:55,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 916 states. [2018-09-26 21:20:55,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 992 transitions. [2018-09-26 21:20:55,678 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 992 transitions. Word has length 903 [2018-09-26 21:20:55,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:55,679 INFO L480 AbstractCegarLoop]: Abstraction has 916 states and 992 transitions. [2018-09-26 21:20:55,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-26 21:20:55,679 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 992 transitions. [2018-09-26 21:20:55,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2018-09-26 21:20:55,684 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:55,685 INFO L375 BasicCegarLoop]: trace histogram [760, 76, 76, 1, 1, 1] [2018-09-26 21:20:55,685 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:55,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:55,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1703395077, now seen corresponding path program 79 times [2018-09-26 21:20:55,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:55,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:55,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:55,686 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:55,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 351956 backedges. 0 proven. 347776 refuted. 0 times theorem prover too weak. 4180 trivial. 0 not checked. [2018-09-26 21:20:58,859 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:58,859 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:20:58,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:59,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:59,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:59,923 INFO L134 CoverageAnalysis]: Checked inductivity of 351956 backedges. 0 proven. 347776 refuted. 0 times theorem prover too weak. 4180 trivial. 0 not checked. [2018-09-26 21:20:59,945 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:59,946 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-26 21:20:59,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-26 21:20:59,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-26 21:20:59,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-26 21:20:59,947 INFO L87 Difference]: Start difference. First operand 916 states and 992 transitions. Second operand 79 states. [2018-09-26 21:21:01,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:01,341 INFO L93 Difference]: Finished difference Result 941 states and 1019 transitions. [2018-09-26 21:21:01,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-26 21:21:01,341 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 915 [2018-09-26 21:21:01,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:01,343 INFO L225 Difference]: With dead ends: 941 [2018-09-26 21:21:01,343 INFO L226 Difference]: Without dead ends: 939 [2018-09-26 21:21:01,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 992 GetRequests, 915 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-26 21:21:01,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2018-09-26 21:21:02,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 928. [2018-09-26 21:21:02,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 928 states. [2018-09-26 21:21:02,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1005 transitions. [2018-09-26 21:21:02,257 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1005 transitions. Word has length 915 [2018-09-26 21:21:02,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:02,258 INFO L480 AbstractCegarLoop]: Abstraction has 928 states and 1005 transitions. [2018-09-26 21:21:02,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-26 21:21:02,258 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1005 transitions. [2018-09-26 21:21:02,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 928 [2018-09-26 21:21:02,263 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:02,264 INFO L375 BasicCegarLoop]: trace histogram [770, 77, 77, 1, 1, 1] [2018-09-26 21:21:02,264 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:02,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:02,264 INFO L82 PathProgramCache]: Analyzing trace with hash 345957445, now seen corresponding path program 80 times [2018-09-26 21:21:02,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:02,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:02,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:02,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:02,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:02,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-26 21:21:04,605 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 21:21:04,609 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 21:21:04,610 INFO L202 PluginConnector]: Adding new model nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:21:04 BoogieIcfgContainer [2018-09-26 21:21:04,610 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:21:04,611 INFO L168 Benchmark]: Toolchain (without parser) took 246691.09 ms. Allocated memory was 1.6 GB in the beginning and 3.6 GB in the end (delta: 2.0 GB). Free memory was 1.5 GB in the beginning and 964.0 MB in the end (delta: 518.4 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-09-26 21:21:04,612 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:21:04,613 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.66 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:21:04,613 INFO L168 Benchmark]: Boogie Preprocessor took 26.08 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:21:04,613 INFO L168 Benchmark]: RCFGBuilder took 343.13 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-26 21:21:04,614 INFO L168 Benchmark]: TraceAbstraction took 246276.28 ms. Allocated memory was 1.6 GB in the beginning and 3.6 GB in the end (delta: 2.0 GB). Free memory was 1.5 GB in the beginning and 964.0 MB in the end (delta: 497.3 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-09-26 21:21:04,617 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 39.66 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.08 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 343.13 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 246276.28 ms. Allocated memory was 1.6 GB in the beginning and 3.6 GB in the end (delta: 2.0 GB). Free memory was 1.5 GB in the beginning and 964.0 MB in the end (delta: 497.3 MB). Peak memory consumption was 2.5 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 928 with TraceHistMax 770, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 76 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 246.2s OverallTime, 82 OverallIterations, 770 TraceHistogramMax, 53.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 322 SDtfs, 6000 SDslu, 4360 SDs, 0 SdLazy, 7596 SolverSat, 461 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 19.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38567 GetRequests, 35300 SyntacticMatches, 0 SemanticMatches, 3267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5190 ImplicationChecksByTransitivity, 80.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=928occurred in iteration=81, 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: 22.3s AutomataMinimizationTime, 81 MinimizatonAttempts, 818 StatesRemovedByMinimization, 77 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 4.3s SsaConstructionTime, 51.2s SatisfiabilityAnalysisTime, 96.0s InterpolantComputationTime, 70670 NumberOfCodeBlocks, 70499 NumberOfCodeBlocksAsserted, 8914 NumberOfCheckSat, 70510 ConstructedInterpolants, 0 QuantifiedInterpolants, 129595912 SizeOfPredicates, 79 NumberOfNonLiveVariables, 141266 ConjunctsInSsa, 3108 ConjunctsInUnsatCore, 160 InterpolantComputations, 2 PerfectInterpolantSequences, 324343/18173289 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-0-2018-09-26_21-21-04-626.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-0-2018-09-26_21-21-04-626.csv Completed graceful shutdown