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 0.1.23-00a8621 [2018-09-30 10:19:25,781 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 10:19:25,783 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 10:19:25,795 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 10:19:25,795 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 10:19:25,796 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 10:19:25,797 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 10:19:25,799 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 10:19:25,801 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 10:19:25,802 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 10:19:25,803 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 10:19:25,826 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 10:19:25,841 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 10:19:25,842 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 10:19:25,842 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 10:19:25,843 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 10:19:25,843 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 10:19:25,843 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 10:19:25,844 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 10:19:25,844 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 10:19:25,844 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 10:19:25,844 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 10:19:25,844 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 10:19:25,845 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 10:19:25,845 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 10:19:25,845 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 10:19:25,845 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 10:19:25,845 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 10:19:25,845 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 10:19:25,846 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 10:19:25,846 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 10:19:25,846 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 10:19:25,846 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 10:19:25,846 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 10:19:25,847 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:19:25,847 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 10:19:25,847 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 10:19:25,847 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 10:19:25,847 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 10:19:25,848 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 10:19:25,848 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 10:19:25,848 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 10:19:25,891 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 10:19:25,904 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 10:19:25,908 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 10:19:25,910 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 10:19:25,910 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 10:19:25,911 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl [2018-09-30 10:19:25,912 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl' [2018-09-30 10:19:25,981 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 10:19:25,986 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 10:19:25,987 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 10:19:25,987 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 10:19:25,988 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 10:19:26,010 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 30.09 10:19:25" (1/1) ... [2018-09-30 10:19:26,024 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 30.09 10:19:25" (1/1) ... [2018-09-30 10:19:26,031 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 10:19:26,032 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 10:19:26,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 10:19:26,033 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 10:19:26,045 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 30.09 10:19:25" (1/1) ... [2018-09-30 10:19:26,046 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 30.09 10:19:25" (1/1) ... [2018-09-30 10:19:26,047 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 30.09 10:19:25" (1/1) ... [2018-09-30 10:19:26,047 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 30.09 10:19:25" (1/1) ... [2018-09-30 10:19:26,051 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 30.09 10:19:25" (1/1) ... [2018-09-30 10:19:26,053 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 30.09 10:19:25" (1/1) ... [2018-09-30 10:19:26,054 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 30.09 10:19:25" (1/1) ... [2018-09-30 10:19:26,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 10:19:26,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 10:19:26,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 10:19:26,057 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 10:19:26,058 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 30.09 10:19:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:19:26,137 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-30 10:19:26,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 10:19:26,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 10:19:26,407 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 10:19:26,408 INFO L202 PluginConnector]: Adding new model nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:19:26 BoogieIcfgContainer [2018-09-30 10:19:26,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 10:19:26,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 10:19:26,409 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 10:19:26,415 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 10:19:26,416 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 30.09 10:19:25" (1/2) ... [2018-09-30 10:19:26,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3518ed6d and model type nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 10:19:26, skipping insertion in model container [2018-09-30 10:19:26,417 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 30.09 10:19:26" (2/2) ... [2018-09-30 10:19:26,420 INFO L112 eAbstractionObserver]: Analyzing ICFG nested1.i_4.bplTransformedIcfg_BEv2_12.bpl [2018-09-30 10:19:26,432 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 10:19:26,443 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 10:19:26,503 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 10:19:26,504 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 10:19:26,504 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 10:19:26,504 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 10:19:26,506 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 10:19:26,506 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 10:19:26,506 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 10:19:26,507 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 10:19:26,507 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 10:19:26,525 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-09-30 10:19:26,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 10:19:26,534 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:26,535 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 10:19:26,536 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:26,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:26,543 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-09-30 10:19:26,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:26,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:26,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:26,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:26,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:26,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:26,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:26,713 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:19:26,713 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 10:19:26,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 10:19:26,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 10:19:26,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 10:19:26,738 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-09-30 10:19:26,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:26,825 INFO L93 Difference]: Finished difference Result 11 states and 17 transitions. [2018-09-30 10:19:26,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 10:19:26,827 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 10:19:26,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:26,842 INFO L225 Difference]: With dead ends: 11 [2018-09-30 10:19:26,842 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 10:19:26,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 10:19:26,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 10:19:26,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2018-09-30 10:19:26,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 10:19:26,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2018-09-30 10:19:26,911 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 7 transitions. Word has length 3 [2018-09-30 10:19:26,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:26,911 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 7 transitions. [2018-09-30 10:19:26,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 10:19:26,912 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 7 transitions. [2018-09-30 10:19:26,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 10:19:26,912 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:26,913 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-30 10:19:26,913 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:26,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:26,913 INFO L82 PathProgramCache]: Analyzing trace with hash 28854189, now seen corresponding path program 1 times [2018-09-30 10:19:26,914 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:26,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:26,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:26,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:26,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:26,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:26,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:26,989 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:19:26,989 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 10:19:26,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 10:19:26,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 10:19:26,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 10:19:26,992 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. Second operand 3 states. [2018-09-30 10:19:27,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:27,054 INFO L93 Difference]: Finished difference Result 11 states and 14 transitions. [2018-09-30 10:19:27,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 10:19:27,055 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-09-30 10:19:27,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:27,055 INFO L225 Difference]: With dead ends: 11 [2018-09-30 10:19:27,056 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 10:19:27,057 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 [2018-09-30 10:19:27,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 10:19:27,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 10:19:27,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 10:19:27,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-09-30 10:19:27,060 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-09-30 10:19:27,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:27,060 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-09-30 10:19:27,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 10:19:27,060 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2018-09-30 10:19:27,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 10:19:27,061 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:27,061 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-30 10:19:27,061 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:27,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:27,062 INFO L82 PathProgramCache]: Analyzing trace with hash 894431694, now seen corresponding path program 1 times [2018-09-30 10:19:27,062 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:27,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:27,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:27,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:27,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:27,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:27,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:27,216 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:27,216 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:27,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:27,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:27,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:27,335 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:27,335 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 10:19:27,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 10:19:27,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 10:19:27,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 10:19:27,337 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 4 states. [2018-09-30 10:19:27,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:27,404 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2018-09-30 10:19:27,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 10:19:27,405 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-30 10:19:27,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:27,406 INFO L225 Difference]: With dead ends: 13 [2018-09-30 10:19:27,406 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 10:19:27,407 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 [2018-09-30 10:19:27,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 10:19:27,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 10:19:27,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 10:19:27,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-09-30 10:19:27,413 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2018-09-30 10:19:27,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:27,414 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-09-30 10:19:27,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 10:19:27,414 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2018-09-30 10:19:27,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 10:19:27,415 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:27,415 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-30 10:19:27,415 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:27,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:27,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1957530573, now seen corresponding path program 2 times [2018-09-30 10:19:27,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:27,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:27,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:27,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:27,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:27,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 10:19:27,503 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:27,503 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:27,523 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:19:27,565 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:19:27,565 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:27,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:27,661 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:27,661 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5] total 7 [2018-09-30 10:19:27,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:19:27,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:19:27,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:19:27,663 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 7 states. [2018-09-30 10:19:28,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:28,132 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2018-09-30 10:19:28,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 10:19:28,133 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-30 10:19:28,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:28,133 INFO L225 Difference]: With dead ends: 24 [2018-09-30 10:19:28,134 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 10:19:28,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:19:28,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 10:19:28,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2018-09-30 10:19:28,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 10:19:28,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-09-30 10:19:28,143 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2018-09-30 10:19:28,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:28,143 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-09-30 10:19:28,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:19:28,144 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-09-30 10:19:28,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:19:28,144 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:28,144 INFO L375 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1] [2018-09-30 10:19:28,145 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:28,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:28,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1143121891, now seen corresponding path program 3 times [2018-09-30 10:19:28,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:28,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:28,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:28,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:28,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:28,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:28,247 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-30 10:19:28,247 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:28,248 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:28,260 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:19:28,292 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 10:19:28,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:28,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:28,305 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-30 10:19:28,327 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:28,327 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:19:28,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:19:28,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:19:28,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:19:28,328 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 6 states. [2018-09-30 10:19:28,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:28,395 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2018-09-30 10:19:28,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:19:28,396 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-09-30 10:19:28,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:28,397 INFO L225 Difference]: With dead ends: 24 [2018-09-30 10:19:28,397 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 10:19:28,397 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 [2018-09-30 10:19:28,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 10:19:28,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 10:19:28,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 10:19:28,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-09-30 10:19:28,402 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2018-09-30 10:19:28,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:28,403 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-09-30 10:19:28,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:19:28,403 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-09-30 10:19:28,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:19:28,404 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:28,404 INFO L375 BasicCegarLoop]: trace histogram [8, 2, 2, 1, 1, 1] [2018-09-30 10:19:28,404 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:28,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:28,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1762706263, now seen corresponding path program 4 times [2018-09-30 10:19:28,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:28,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:28,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:28,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:28,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:28,507 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-30 10:19:28,508 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:28,508 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:28,517 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:19:28,537 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:19:28,537 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:28,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:28,615 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-09-30 10:19:28,638 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:28,639 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 10 [2018-09-30 10:19:28,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:19:28,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:19:28,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:19:28,640 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 10 states. [2018-09-30 10:19:29,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:29,416 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2018-09-30 10:19:29,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 10:19:29,418 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2018-09-30 10:19:29,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:29,419 INFO L225 Difference]: With dead ends: 40 [2018-09-30 10:19:29,419 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:19:29,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2018-09-30 10:19:29,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:19:29,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2018-09-30 10:19:29,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 10:19:29,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2018-09-30 10:19:29,427 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 15 [2018-09-30 10:19:29,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:29,427 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2018-09-30 10:19:29,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:19:29,428 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2018-09-30 10:19:29,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 10:19:29,429 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:29,429 INFO L375 BasicCegarLoop]: trace histogram [15, 3, 3, 1, 1, 1] [2018-09-30 10:19:29,429 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:29,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:29,430 INFO L82 PathProgramCache]: Analyzing trace with hash 198739950, now seen corresponding path program 5 times [2018-09-30 10:19:29,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:29,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:29,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:29,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:29,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-09-30 10:19:29,531 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:29,531 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:29,538 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:19:29,560 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 10:19:29,560 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:29,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:29,701 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-09-30 10:19:29,724 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:29,724 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 12 [2018-09-30 10:19:29,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 10:19:29,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 10:19:29,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:19:29,726 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 12 states. [2018-09-30 10:19:30,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:30,434 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2018-09-30 10:19:30,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 10:19:30,436 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2018-09-30 10:19:30,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:30,437 INFO L225 Difference]: With dead ends: 60 [2018-09-30 10:19:30,437 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:19:30,438 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=420, Invalid=840, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:19:30,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:19:30,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2018-09-30 10:19:30,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 10:19:30,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2018-09-30 10:19:30,447 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 24 [2018-09-30 10:19:30,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:30,447 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2018-09-30 10:19:30,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 10:19:30,447 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2018-09-30 10:19:30,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 10:19:30,448 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:30,449 INFO L375 BasicCegarLoop]: trace histogram [24, 4, 4, 1, 1, 1] [2018-09-30 10:19:30,449 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:30,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:30,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1597467349, now seen corresponding path program 6 times [2018-09-30 10:19:30,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:30,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:30,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:30,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:30,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 151 proven. 21 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2018-09-30 10:19:30,577 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:30,577 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:30,594 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:19:30,635 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 10:19:30,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:30,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:30,648 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 251 proven. 21 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-09-30 10:19:30,671 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:30,672 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:19:30,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:19:30,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:19:30,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:19:30,673 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 9 states. [2018-09-30 10:19:30,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:30,708 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2018-09-30 10:19:30,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:19:30,709 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2018-09-30 10:19:30,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:30,710 INFO L225 Difference]: With dead ends: 67 [2018-09-30 10:19:30,710 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 10:19:30,711 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 [2018-09-30 10:19:30,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 10:19:30,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 10:19:30,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 10:19:30,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2018-09-30 10:19:30,719 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 35 [2018-09-30 10:19:30,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:30,719 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2018-09-30 10:19:30,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:19:30,719 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2018-09-30 10:19:30,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 10:19:30,721 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:30,721 INFO L375 BasicCegarLoop]: trace histogram [28, 4, 4, 1, 1, 1] [2018-09-30 10:19:30,721 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:30,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:30,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1404785213, now seen corresponding path program 7 times [2018-09-30 10:19:30,722 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:30,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:30,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:30,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:30,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:30,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:30,891 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 394 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-09-30 10:19:30,891 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:30,892 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-30 10:19:30,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:30,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:30,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:31,097 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 196 proven. 28 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2018-09-30 10:19:31,119 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:31,119 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 15 [2018-09-30 10:19:31,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:19:31,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:19:31,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:19:31,120 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 15 states. [2018-09-30 10:19:32,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:32,402 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2018-09-30 10:19:32,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 10:19:32,403 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2018-09-30 10:19:32,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:32,404 INFO L225 Difference]: With dead ends: 93 [2018-09-30 10:19:32,404 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 10:19:32,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=945, Invalid=2025, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 10:19:32,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 10:19:32,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2018-09-30 10:19:32,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 10:19:32,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2018-09-30 10:19:32,418 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 39 [2018-09-30 10:19:32,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:32,418 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2018-09-30 10:19:32,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:19:32,419 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2018-09-30 10:19:32,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 10:19:32,420 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:32,421 INFO L375 BasicCegarLoop]: trace histogram [40, 5, 5, 1, 1, 1] [2018-09-30 10:19:32,421 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:32,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:32,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1154943019, now seen corresponding path program 8 times [2018-09-30 10:19:32,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:32,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:32,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:32,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:32,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:32,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 0 proven. 825 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-09-30 10:19:32,554 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:32,554 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:32,589 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:19:32,653 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:19:32,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:32,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:32,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 329 proven. 36 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2018-09-30 10:19:32,965 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:32,965 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 17 [2018-09-30 10:19:32,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 10:19:32,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 10:19:32,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:19:32,966 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 17 states. [2018-09-30 10:19:34,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:34,381 INFO L93 Difference]: Finished difference Result 123 states and 142 transitions. [2018-09-30 10:19:34,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 10:19:34,382 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2018-09-30 10:19:34,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:34,385 INFO L225 Difference]: With dead ends: 123 [2018-09-30 10:19:34,385 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 10:19:34,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1476 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1540, Invalid=3430, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 10:19:34,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 10:19:34,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2018-09-30 10:19:34,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 10:19:34,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2018-09-30 10:19:34,410 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 53 [2018-09-30 10:19:34,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:34,410 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2018-09-30 10:19:34,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 10:19:34,410 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2018-09-30 10:19:34,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-30 10:19:34,414 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:34,414 INFO L375 BasicCegarLoop]: trace histogram [54, 6, 6, 1, 1, 1] [2018-09-30 10:19:34,417 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:34,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:34,418 INFO L82 PathProgramCache]: Analyzing trace with hash -2076506525, now seen corresponding path program 9 times [2018-09-30 10:19:34,418 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:34,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:34,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:34,419 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:34,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:34,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2018-09-30 10:19:34,701 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:34,701 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:34,709 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:19:34,741 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 10:19:34,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:34,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:34,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 506 proven. 45 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2018-09-30 10:19:34,964 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:34,964 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 19 [2018-09-30 10:19:34,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 10:19:34,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 10:19:34,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:19:34,965 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 19 states. [2018-09-30 10:19:37,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:37,945 INFO L93 Difference]: Finished difference Result 157 states and 179 transitions. [2018-09-30 10:19:37,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 10:19:37,946 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 69 [2018-09-30 10:19:37,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:37,947 INFO L225 Difference]: With dead ends: 157 [2018-09-30 10:19:37,947 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 10:19:37,951 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2475 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2376, Invalid=5456, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 10:19:37,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 10:19:37,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 88. [2018-09-30 10:19:37,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-30 10:19:37,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2018-09-30 10:19:37,976 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 69 [2018-09-30 10:19:37,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:37,976 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2018-09-30 10:19:37,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 10:19:37,976 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2018-09-30 10:19:37,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-30 10:19:37,978 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:37,978 INFO L375 BasicCegarLoop]: trace histogram [70, 7, 7, 1, 1, 1] [2018-09-30 10:19:37,979 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:37,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:37,980 INFO L82 PathProgramCache]: Analyzing trace with hash -815084279, now seen corresponding path program 10 times [2018-09-30 10:19:37,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:37,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:37,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:37,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:37,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:38,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2954 backedges. 0 proven. 2569 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-09-30 10:19:38,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:38,257 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:38,269 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:19:38,349 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:19:38,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:38,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2954 backedges. 0 proven. 2569 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-09-30 10:19:38,451 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:38,451 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:19:38,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:19:38,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:19:38,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:19:38,452 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 10 states. [2018-09-30 10:19:38,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:38,609 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2018-09-30 10:19:38,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:19:38,610 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 87 [2018-09-30 10:19:38,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:38,611 INFO L225 Difference]: With dead ends: 113 [2018-09-30 10:19:38,611 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 10:19:38,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:19:38,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 10:19:38,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 100. [2018-09-30 10:19:38,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 10:19:38,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2018-09-30 10:19:38,639 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 87 [2018-09-30 10:19:38,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:38,640 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2018-09-30 10:19:38,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:19:38,640 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2018-09-30 10:19:38,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-30 10:19:38,642 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:38,642 INFO L375 BasicCegarLoop]: trace histogram [80, 8, 8, 1, 1, 1] [2018-09-30 10:19:38,642 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:38,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:38,645 INFO L82 PathProgramCache]: Analyzing trace with hash 558484307, now seen corresponding path program 11 times [2018-09-30 10:19:38,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:38,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:38,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:38,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:38,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:38,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3864 backedges. 0 proven. 3424 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-09-30 10:19:38,830 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:38,830 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:38,841 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:19:39,189 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-30 10:19:39,189 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:39,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3864 backedges. 0 proven. 3424 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-09-30 10:19:39,237 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:39,237 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:19:39,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:19:39,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:19:39,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:19:39,238 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand 11 states. [2018-09-30 10:19:39,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:39,415 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2018-09-30 10:19:39,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:19:39,416 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 99 [2018-09-30 10:19:39,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:39,417 INFO L225 Difference]: With dead ends: 125 [2018-09-30 10:19:39,417 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 10:19:39,418 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 [2018-09-30 10:19:39,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 10:19:39,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 112. [2018-09-30 10:19:39,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-30 10:19:39,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 121 transitions. [2018-09-30 10:19:39,441 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 121 transitions. Word has length 99 [2018-09-30 10:19:39,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:39,442 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 121 transitions. [2018-09-30 10:19:39,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:19:39,442 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 121 transitions. [2018-09-30 10:19:39,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-30 10:19:39,444 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:39,444 INFO L375 BasicCegarLoop]: trace histogram [90, 9, 9, 1, 1, 1] [2018-09-30 10:19:39,444 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:39,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:39,444 INFO L82 PathProgramCache]: Analyzing trace with hash -2005161315, now seen corresponding path program 12 times [2018-09-30 10:19:39,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:39,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:39,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:39,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:39,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:39,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4896 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-09-30 10:19:39,953 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:39,953 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:39,963 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:19:40,057 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2018-09-30 10:19:40,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:40,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:40,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4896 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-09-30 10:19:40,105 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:40,105 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 10:19:40,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 10:19:40,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 10:19:40,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:19:40,106 INFO L87 Difference]: Start difference. First operand 112 states and 121 transitions. Second operand 12 states. [2018-09-30 10:19:40,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:40,421 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2018-09-30 10:19:40,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 10:19:40,423 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 111 [2018-09-30 10:19:40,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:40,424 INFO L225 Difference]: With dead ends: 137 [2018-09-30 10:19:40,424 INFO L226 Difference]: Without dead ends: 135 [2018-09-30 10:19:40,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:19:40,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-30 10:19:40,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 124. [2018-09-30 10:19:40,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-30 10:19:40,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2018-09-30 10:19:40,464 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 111 [2018-09-30 10:19:40,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:40,464 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2018-09-30 10:19:40,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 10:19:40,467 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2018-09-30 10:19:40,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-30 10:19:40,469 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:40,469 INFO L375 BasicCegarLoop]: trace histogram [100, 10, 10, 1, 1, 1] [2018-09-30 10:19:40,475 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:40,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:40,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1028199705, now seen corresponding path program 13 times [2018-09-30 10:19:40,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:40,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:40,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:40,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:40,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:40,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:40,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-09-30 10:19:40,727 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:40,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:40,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:40,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:40,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-09-30 10:19:40,887 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:40,887 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 10:19:40,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:19:40,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:19:40,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:19:40,888 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand 13 states. [2018-09-30 10:19:41,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:41,123 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2018-09-30 10:19:41,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 10:19:41,123 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 123 [2018-09-30 10:19:41,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:41,124 INFO L225 Difference]: With dead ends: 149 [2018-09-30 10:19:41,124 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 10:19:41,125 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 [2018-09-30 10:19:41,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 10:19:41,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 136. [2018-09-30 10:19:41,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-30 10:19:41,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 147 transitions. [2018-09-30 10:19:41,150 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 147 transitions. Word has length 123 [2018-09-30 10:19:41,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:41,151 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 147 transitions. [2018-09-30 10:19:41,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:19:41,151 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 147 transitions. [2018-09-30 10:19:41,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-30 10:19:41,153 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:41,153 INFO L375 BasicCegarLoop]: trace histogram [110, 11, 11, 1, 1, 1] [2018-09-30 10:19:41,153 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:41,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:41,154 INFO L82 PathProgramCache]: Analyzing trace with hash 804391985, now seen corresponding path program 14 times [2018-09-30 10:19:41,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:41,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:41,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:41,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:41,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7326 backedges. 0 proven. 6721 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2018-09-30 10:19:41,411 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:41,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:41,418 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:19:41,502 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:19:41,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:41,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7326 backedges. 0 proven. 6721 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2018-09-30 10:19:41,578 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:41,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 10:19:41,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:19:41,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:19:41,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:19:41,580 INFO L87 Difference]: Start difference. First operand 136 states and 147 transitions. Second operand 14 states. [2018-09-30 10:19:41,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:41,685 INFO L93 Difference]: Finished difference Result 161 states and 174 transitions. [2018-09-30 10:19:41,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 10:19:41,685 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 135 [2018-09-30 10:19:41,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:41,686 INFO L225 Difference]: With dead ends: 161 [2018-09-30 10:19:41,687 INFO L226 Difference]: Without dead ends: 159 [2018-09-30 10:19:41,687 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 [2018-09-30 10:19:41,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-30 10:19:41,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 148. [2018-09-30 10:19:41,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-30 10:19:41,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 160 transitions. [2018-09-30 10:19:41,709 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 160 transitions. Word has length 135 [2018-09-30 10:19:41,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:41,710 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 160 transitions. [2018-09-30 10:19:41,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:19:41,710 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 160 transitions. [2018-09-30 10:19:41,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-30 10:19:41,711 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:41,711 INFO L375 BasicCegarLoop]: trace histogram [120, 12, 12, 1, 1, 1] [2018-09-30 10:19:41,712 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:41,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:41,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1919127163, now seen corresponding path program 15 times [2018-09-30 10:19:41,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:41,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:41,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:41,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:41,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:41,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:42,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8724 backedges. 0 proven. 8064 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-09-30 10:19:42,092 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:42,093 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:42,101 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:19:42,243 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 73 check-sat command(s) [2018-09-30 10:19:42,243 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:42,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8724 backedges. 0 proven. 8064 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-09-30 10:19:42,290 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:42,290 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 10:19:42,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:19:42,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:19:42,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:19:42,291 INFO L87 Difference]: Start difference. First operand 148 states and 160 transitions. Second operand 15 states. [2018-09-30 10:19:42,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:42,454 INFO L93 Difference]: Finished difference Result 173 states and 187 transitions. [2018-09-30 10:19:42,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 10:19:42,455 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 147 [2018-09-30 10:19:42,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:42,456 INFO L225 Difference]: With dead ends: 173 [2018-09-30 10:19:42,456 INFO L226 Difference]: Without dead ends: 171 [2018-09-30 10:19:42,457 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 [2018-09-30 10:19:42,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-30 10:19:42,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 160. [2018-09-30 10:19:42,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-30 10:19:42,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2018-09-30 10:19:42,491 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 147 [2018-09-30 10:19:42,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:42,492 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2018-09-30 10:19:42,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:19:42,492 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2018-09-30 10:19:42,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-09-30 10:19:42,494 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:42,494 INFO L375 BasicCegarLoop]: trace histogram [130, 13, 13, 1, 1, 1] [2018-09-30 10:19:42,494 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:42,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:42,495 INFO L82 PathProgramCache]: Analyzing trace with hash 243397061, now seen corresponding path program 16 times [2018-09-30 10:19:42,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:42,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:42,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:42,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:42,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:42,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:42,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10244 backedges. 0 proven. 9529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2018-09-30 10:19:42,936 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:42,936 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:42,943 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:19:43,035 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:19:43,036 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:43,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:43,099 INFO L134 CoverageAnalysis]: Checked inductivity of 10244 backedges. 0 proven. 9529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2018-09-30 10:19:43,125 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:43,125 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 10:19:43,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:19:43,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:19:43,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:19:43,126 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand 16 states. [2018-09-30 10:19:43,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:43,229 INFO L93 Difference]: Finished difference Result 185 states and 200 transitions. [2018-09-30 10:19:43,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 10:19:43,230 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 159 [2018-09-30 10:19:43,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:43,231 INFO L225 Difference]: With dead ends: 185 [2018-09-30 10:19:43,231 INFO L226 Difference]: Without dead ends: 183 [2018-09-30 10:19:43,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:19:43,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-30 10:19:43,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 172. [2018-09-30 10:19:43,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-09-30 10:19:43,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 186 transitions. [2018-09-30 10:19:43,261 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 186 transitions. Word has length 159 [2018-09-30 10:19:43,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:43,261 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 186 transitions. [2018-09-30 10:19:43,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:19:43,261 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 186 transitions. [2018-09-30 10:19:43,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-09-30 10:19:43,263 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:43,263 INFO L375 BasicCegarLoop]: trace histogram [140, 14, 14, 1, 1, 1] [2018-09-30 10:19:43,263 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:43,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:43,264 INFO L82 PathProgramCache]: Analyzing trace with hash 184792591, now seen corresponding path program 17 times [2018-09-30 10:19:43,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:43,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:43,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:43,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:43,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:43,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:43,809 INFO L134 CoverageAnalysis]: Checked inductivity of 11886 backedges. 0 proven. 11116 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-09-30 10:19:43,809 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:43,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:43,824 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:19:44,047 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2018-09-30 10:19:44,047 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:44,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11886 backedges. 0 proven. 11116 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-09-30 10:19:44,119 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:44,119 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 10:19:44,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 10:19:44,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 10:19:44,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:19:44,120 INFO L87 Difference]: Start difference. First operand 172 states and 186 transitions. Second operand 17 states. [2018-09-30 10:19:44,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:44,290 INFO L93 Difference]: Finished difference Result 197 states and 213 transitions. [2018-09-30 10:19:44,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 10:19:44,291 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 171 [2018-09-30 10:19:44,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:44,292 INFO L225 Difference]: With dead ends: 197 [2018-09-30 10:19:44,292 INFO L226 Difference]: Without dead ends: 195 [2018-09-30 10:19:44,293 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:19:44,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-30 10:19:44,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 184. [2018-09-30 10:19:44,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-09-30 10:19:44,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 199 transitions. [2018-09-30 10:19:44,325 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 199 transitions. Word has length 171 [2018-09-30 10:19:44,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:44,326 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 199 transitions. [2018-09-30 10:19:44,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 10:19:44,326 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 199 transitions. [2018-09-30 10:19:44,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-09-30 10:19:44,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:44,327 INFO L375 BasicCegarLoop]: trace histogram [150, 15, 15, 1, 1, 1] [2018-09-30 10:19:44,327 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:44,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:44,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1864410279, now seen corresponding path program 18 times [2018-09-30 10:19:44,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:44,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:44,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:44,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:44,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:44,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:45,367 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 0 proven. 12825 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2018-09-30 10:19:45,367 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:45,368 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:45,375 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:19:45,704 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 86 check-sat command(s) [2018-09-30 10:19:45,704 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:45,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:45,741 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 0 proven. 12825 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2018-09-30 10:19:45,763 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:45,763 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 10:19:45,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 10:19:45,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 10:19:45,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:19:45,764 INFO L87 Difference]: Start difference. First operand 184 states and 199 transitions. Second operand 18 states. [2018-09-30 10:19:45,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:45,883 INFO L93 Difference]: Finished difference Result 209 states and 226 transitions. [2018-09-30 10:19:45,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 10:19:45,883 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 183 [2018-09-30 10:19:45,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:45,885 INFO L225 Difference]: With dead ends: 209 [2018-09-30 10:19:45,885 INFO L226 Difference]: Without dead ends: 207 [2018-09-30 10:19:45,885 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 [2018-09-30 10:19:45,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-30 10:19:45,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 196. [2018-09-30 10:19:45,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-09-30 10:19:45,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 212 transitions. [2018-09-30 10:19:45,918 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 212 transitions. Word has length 183 [2018-09-30 10:19:45,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:45,918 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 212 transitions. [2018-09-30 10:19:45,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 10:19:45,919 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 212 transitions. [2018-09-30 10:19:45,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-09-30 10:19:45,920 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:45,920 INFO L375 BasicCegarLoop]: trace histogram [160, 16, 16, 1, 1, 1] [2018-09-30 10:19:45,920 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:45,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:45,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1957994077, now seen corresponding path program 19 times [2018-09-30 10:19:45,920 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:45,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:45,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:45,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:45,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:45,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:46,257 INFO L134 CoverageAnalysis]: Checked inductivity of 15536 backedges. 0 proven. 14656 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-09-30 10:19:46,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:46,257 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:46,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:46,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:46,424 INFO L134 CoverageAnalysis]: Checked inductivity of 15536 backedges. 0 proven. 14656 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-09-30 10:19:46,450 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:46,450 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 10:19:46,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 10:19:46,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 10:19:46,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:19:46,451 INFO L87 Difference]: Start difference. First operand 196 states and 212 transitions. Second operand 19 states. [2018-09-30 10:19:46,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:46,582 INFO L93 Difference]: Finished difference Result 221 states and 239 transitions. [2018-09-30 10:19:46,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 10:19:46,582 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 195 [2018-09-30 10:19:46,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:46,584 INFO L225 Difference]: With dead ends: 221 [2018-09-30 10:19:46,584 INFO L226 Difference]: Without dead ends: 219 [2018-09-30 10:19:46,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:19:46,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-30 10:19:46,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 208. [2018-09-30 10:19:46,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-09-30 10:19:46,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 225 transitions. [2018-09-30 10:19:46,626 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 225 transitions. Word has length 195 [2018-09-30 10:19:46,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:46,627 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 225 transitions. [2018-09-30 10:19:46,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 10:19:46,627 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 225 transitions. [2018-09-30 10:19:46,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-09-30 10:19:46,628 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:46,628 INFO L375 BasicCegarLoop]: trace histogram [170, 17, 17, 1, 1, 1] [2018-09-30 10:19:46,628 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:46,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:46,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1203652845, now seen corresponding path program 20 times [2018-09-30 10:19:46,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:46,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:46,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:46,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:46,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:47,172 INFO L134 CoverageAnalysis]: Checked inductivity of 17544 backedges. 0 proven. 16609 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2018-09-30 10:19:47,173 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:47,173 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:47,182 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:19:47,329 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:19:47,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:47,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:47,380 INFO L134 CoverageAnalysis]: Checked inductivity of 17544 backedges. 0 proven. 16609 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2018-09-30 10:19:47,401 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:47,402 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 10:19:47,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 10:19:47,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 10:19:47,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:19:47,403 INFO L87 Difference]: Start difference. First operand 208 states and 225 transitions. Second operand 20 states. [2018-09-30 10:19:47,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:47,571 INFO L93 Difference]: Finished difference Result 233 states and 252 transitions. [2018-09-30 10:19:47,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 10:19:47,574 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 207 [2018-09-30 10:19:47,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:47,575 INFO L225 Difference]: With dead ends: 233 [2018-09-30 10:19:47,575 INFO L226 Difference]: Without dead ends: 231 [2018-09-30 10:19:47,576 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 [2018-09-30 10:19:47,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-09-30 10:19:47,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 220. [2018-09-30 10:19:47,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-09-30 10:19:47,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 238 transitions. [2018-09-30 10:19:47,620 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 238 transitions. Word has length 207 [2018-09-30 10:19:47,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:47,621 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 238 transitions. [2018-09-30 10:19:47,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 10:19:47,621 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 238 transitions. [2018-09-30 10:19:47,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-09-30 10:19:47,622 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:47,622 INFO L375 BasicCegarLoop]: trace histogram [180, 18, 18, 1, 1, 1] [2018-09-30 10:19:47,623 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:47,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:47,623 INFO L82 PathProgramCache]: Analyzing trace with hash 367956279, now seen corresponding path program 21 times [2018-09-30 10:19:47,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:47,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:47,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:47,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:47,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:47,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:48,364 INFO L134 CoverageAnalysis]: Checked inductivity of 19674 backedges. 0 proven. 18684 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-09-30 10:19:48,364 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:48,365 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:48,376 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:19:48,632 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 109 check-sat command(s) [2018-09-30 10:19:48,632 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:48,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 19674 backedges. 0 proven. 18684 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-09-30 10:19:48,711 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:48,711 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 10:19:48,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 10:19:48,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 10:19:48,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 10:19:48,712 INFO L87 Difference]: Start difference. First operand 220 states and 238 transitions. Second operand 21 states. [2018-09-30 10:19:48,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:48,859 INFO L93 Difference]: Finished difference Result 245 states and 265 transitions. [2018-09-30 10:19:48,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 10:19:48,859 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 219 [2018-09-30 10:19:48,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:48,860 INFO L225 Difference]: With dead ends: 245 [2018-09-30 10:19:48,861 INFO L226 Difference]: Without dead ends: 243 [2018-09-30 10:19:48,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 10:19:48,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-30 10:19:48,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 232. [2018-09-30 10:19:48,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-09-30 10:19:48,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 251 transitions. [2018-09-30 10:19:48,910 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 251 transitions. Word has length 219 [2018-09-30 10:19:48,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:48,910 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 251 transitions. [2018-09-30 10:19:48,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 10:19:48,910 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 251 transitions. [2018-09-30 10:19:48,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-09-30 10:19:48,912 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:48,912 INFO L375 BasicCegarLoop]: trace histogram [190, 19, 19, 1, 1, 1] [2018-09-30 10:19:48,912 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:48,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:48,912 INFO L82 PathProgramCache]: Analyzing trace with hash -405620095, now seen corresponding path program 22 times [2018-09-30 10:19:48,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:48,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:48,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:48,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:48,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 21926 backedges. 0 proven. 20881 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2018-09-30 10:19:49,318 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:49,318 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:49,327 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:19:49,448 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:19:49,448 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:49,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:49,502 INFO L134 CoverageAnalysis]: Checked inductivity of 21926 backedges. 0 proven. 20881 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2018-09-30 10:19:49,524 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:49,524 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 10:19:49,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 10:19:49,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 10:19:49,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:19:49,525 INFO L87 Difference]: Start difference. First operand 232 states and 251 transitions. Second operand 22 states. [2018-09-30 10:19:49,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:49,681 INFO L93 Difference]: Finished difference Result 257 states and 278 transitions. [2018-09-30 10:19:49,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 10:19:49,689 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 231 [2018-09-30 10:19:49,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:49,690 INFO L225 Difference]: With dead ends: 257 [2018-09-30 10:19:49,691 INFO L226 Difference]: Without dead ends: 255 [2018-09-30 10:19:49,691 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 [2018-09-30 10:19:49,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-09-30 10:19:49,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 244. [2018-09-30 10:19:49,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-09-30 10:19:49,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 264 transitions. [2018-09-30 10:19:49,770 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 264 transitions. Word has length 231 [2018-09-30 10:19:49,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:49,770 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 264 transitions. [2018-09-30 10:19:49,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 10:19:49,770 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 264 transitions. [2018-09-30 10:19:49,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-09-30 10:19:49,772 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:49,772 INFO L375 BasicCegarLoop]: trace histogram [200, 20, 20, 1, 1, 1] [2018-09-30 10:19:49,772 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:49,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:49,773 INFO L82 PathProgramCache]: Analyzing trace with hash -241089333, now seen corresponding path program 23 times [2018-09-30 10:19:49,773 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:49,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:49,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:49,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:49,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:50,391 INFO L134 CoverageAnalysis]: Checked inductivity of 24300 backedges. 0 proven. 23200 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2018-09-30 10:19:50,392 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:50,392 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:50,399 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:19:50,790 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 121 check-sat command(s) [2018-09-30 10:19:50,790 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:50,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 24300 backedges. 0 proven. 23200 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2018-09-30 10:19:50,885 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:50,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 10:19:50,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 10:19:50,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 10:19:50,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 10:19:50,887 INFO L87 Difference]: Start difference. First operand 244 states and 264 transitions. Second operand 23 states. [2018-09-30 10:19:51,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:51,069 INFO L93 Difference]: Finished difference Result 269 states and 291 transitions. [2018-09-30 10:19:51,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 10:19:51,070 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 243 [2018-09-30 10:19:51,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:51,071 INFO L225 Difference]: With dead ends: 269 [2018-09-30 10:19:51,071 INFO L226 Difference]: Without dead ends: 267 [2018-09-30 10:19:51,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 10:19:51,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-09-30 10:19:51,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 256. [2018-09-30 10:19:51,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-09-30 10:19:51,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 277 transitions. [2018-09-30 10:19:51,130 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 277 transitions. Word has length 243 [2018-09-30 10:19:51,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:51,130 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 277 transitions. [2018-09-30 10:19:51,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 10:19:51,130 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 277 transitions. [2018-09-30 10:19:51,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-09-30 10:19:51,132 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:51,132 INFO L375 BasicCegarLoop]: trace histogram [210, 21, 21, 1, 1, 1] [2018-09-30 10:19:51,132 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:51,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:51,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1238413333, now seen corresponding path program 24 times [2018-09-30 10:19:51,133 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:51,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:51,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:51,133 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:51,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 26796 backedges. 0 proven. 25641 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2018-09-30 10:19:52,614 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:52,614 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:52,622 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:19:52,942 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 123 check-sat command(s) [2018-09-30 10:19:52,943 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:52,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:53,005 INFO L134 CoverageAnalysis]: Checked inductivity of 26796 backedges. 0 proven. 25641 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2018-09-30 10:19:53,026 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:53,026 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 10:19:53,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 10:19:53,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 10:19:53,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:19:53,027 INFO L87 Difference]: Start difference. First operand 256 states and 277 transitions. Second operand 24 states. [2018-09-30 10:19:53,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:53,582 INFO L93 Difference]: Finished difference Result 281 states and 304 transitions. [2018-09-30 10:19:53,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 10:19:53,582 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 255 [2018-09-30 10:19:53,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:53,584 INFO L225 Difference]: With dead ends: 281 [2018-09-30 10:19:53,584 INFO L226 Difference]: Without dead ends: 279 [2018-09-30 10:19:53,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:19:53,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-09-30 10:19:53,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 268. [2018-09-30 10:19:53,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-09-30 10:19:53,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 290 transitions. [2018-09-30 10:19:53,655 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 290 transitions. Word has length 255 [2018-09-30 10:19:53,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:53,655 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 290 transitions. [2018-09-30 10:19:53,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 10:19:53,656 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 290 transitions. [2018-09-30 10:19:53,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-09-30 10:19:53,657 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:53,657 INFO L375 BasicCegarLoop]: trace histogram [220, 22, 22, 1, 1, 1] [2018-09-30 10:19:53,658 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:53,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:53,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1994949537, now seen corresponding path program 25 times [2018-09-30 10:19:53,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:53,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:53,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:53,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:53,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:53,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:54,319 INFO L134 CoverageAnalysis]: Checked inductivity of 29414 backedges. 0 proven. 28204 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2018-09-30 10:19:54,320 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:54,320 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 [2018-09-30 10:19:54,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:54,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:54,597 INFO L134 CoverageAnalysis]: Checked inductivity of 29414 backedges. 0 proven. 28204 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2018-09-30 10:19:54,629 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:54,629 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 10:19:54,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 10:19:54,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 10:19:54,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 10:19:54,631 INFO L87 Difference]: Start difference. First operand 268 states and 290 transitions. Second operand 25 states. [2018-09-30 10:19:55,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:55,713 INFO L93 Difference]: Finished difference Result 293 states and 317 transitions. [2018-09-30 10:19:55,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 10:19:55,714 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 267 [2018-09-30 10:19:55,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:55,716 INFO L225 Difference]: With dead ends: 293 [2018-09-30 10:19:55,716 INFO L226 Difference]: Without dead ends: 291 [2018-09-30 10:19:55,716 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 [2018-09-30 10:19:55,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-09-30 10:19:55,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 280. [2018-09-30 10:19:55,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-09-30 10:19:55,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 303 transitions. [2018-09-30 10:19:55,821 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 303 transitions. Word has length 267 [2018-09-30 10:19:55,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:55,822 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 303 transitions. [2018-09-30 10:19:55,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 10:19:55,822 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 303 transitions. [2018-09-30 10:19:55,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-09-30 10:19:55,824 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:55,824 INFO L375 BasicCegarLoop]: trace histogram [230, 23, 23, 1, 1, 1] [2018-09-30 10:19:55,824 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:55,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:55,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1785473449, now seen corresponding path program 26 times [2018-09-30 10:19:55,825 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:55,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:55,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:55,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:55,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:55,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:56,855 INFO L134 CoverageAnalysis]: Checked inductivity of 32154 backedges. 0 proven. 30889 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2018-09-30 10:19:56,855 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:56,855 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 [2018-09-30 10:19:56,863 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:19:57,013 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:19:57,014 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:57,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:57,084 INFO L134 CoverageAnalysis]: Checked inductivity of 32154 backedges. 0 proven. 30889 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2018-09-30 10:19:57,105 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:57,105 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 10:19:57,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 10:19:57,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 10:19:57,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:19:57,106 INFO L87 Difference]: Start difference. First operand 280 states and 303 transitions. Second operand 26 states. [2018-09-30 10:19:57,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:57,311 INFO L93 Difference]: Finished difference Result 305 states and 330 transitions. [2018-09-30 10:19:57,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 10:19:57,311 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 279 [2018-09-30 10:19:57,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:57,313 INFO L225 Difference]: With dead ends: 305 [2018-09-30 10:19:57,313 INFO L226 Difference]: Without dead ends: 303 [2018-09-30 10:19:57,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:19:57,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-09-30 10:19:57,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 292. [2018-09-30 10:19:57,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-09-30 10:19:57,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 316 transitions. [2018-09-30 10:19:57,392 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 316 transitions. Word has length 279 [2018-09-30 10:19:57,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:57,393 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 316 transitions. [2018-09-30 10:19:57,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 10:19:57,393 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 316 transitions. [2018-09-30 10:19:57,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-09-30 10:19:57,394 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:57,394 INFO L375 BasicCegarLoop]: trace histogram [240, 24, 24, 1, 1, 1] [2018-09-30 10:19:57,394 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:57,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:57,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1795504115, now seen corresponding path program 27 times [2018-09-30 10:19:57,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:57,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:57,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:57,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:57,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:57,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:58,959 INFO L134 CoverageAnalysis]: Checked inductivity of 35016 backedges. 0 proven. 33696 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-09-30 10:19:58,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:58,960 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:19:58,968 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:19:59,570 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 145 check-sat command(s) [2018-09-30 10:19:59,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:59,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:59,677 INFO L134 CoverageAnalysis]: Checked inductivity of 35016 backedges. 0 proven. 33696 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-09-30 10:19:59,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:59,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 10:19:59,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 10:19:59,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 10:19:59,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 10:19:59,708 INFO L87 Difference]: Start difference. First operand 292 states and 316 transitions. Second operand 27 states. [2018-09-30 10:19:59,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:59,935 INFO L93 Difference]: Finished difference Result 317 states and 343 transitions. [2018-09-30 10:19:59,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 10:19:59,936 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 291 [2018-09-30 10:19:59,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:59,938 INFO L225 Difference]: With dead ends: 317 [2018-09-30 10:19:59,938 INFO L226 Difference]: Without dead ends: 315 [2018-09-30 10:19:59,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 10:19:59,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-09-30 10:20:00,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 304. [2018-09-30 10:20:00,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-09-30 10:20:00,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 329 transitions. [2018-09-30 10:20:00,053 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 329 transitions. Word has length 291 [2018-09-30 10:20:00,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:00,054 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 329 transitions. [2018-09-30 10:20:00,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 10:20:00,054 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 329 transitions. [2018-09-30 10:20:00,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-09-30 10:20:00,056 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:00,056 INFO L375 BasicCegarLoop]: trace histogram [250, 25, 25, 1, 1, 1] [2018-09-30 10:20:00,057 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:00,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:00,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1784227645, now seen corresponding path program 28 times [2018-09-30 10:20:00,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:00,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:00,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:00,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:00,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:00,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:01,347 INFO L134 CoverageAnalysis]: Checked inductivity of 38000 backedges. 0 proven. 36625 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2018-09-30 10:20:01,348 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:01,348 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 [2018-09-30 10:20:01,356 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:20:01,518 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:20:01,518 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:01,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:01,601 INFO L134 CoverageAnalysis]: Checked inductivity of 38000 backedges. 0 proven. 36625 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2018-09-30 10:20:01,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:01,622 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 10:20:01,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 10:20:01,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 10:20:01,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 10:20:01,623 INFO L87 Difference]: Start difference. First operand 304 states and 329 transitions. Second operand 28 states. [2018-09-30 10:20:01,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:01,849 INFO L93 Difference]: Finished difference Result 329 states and 356 transitions. [2018-09-30 10:20:01,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 10:20:01,850 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 303 [2018-09-30 10:20:01,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:01,851 INFO L225 Difference]: With dead ends: 329 [2018-09-30 10:20:01,852 INFO L226 Difference]: Without dead ends: 327 [2018-09-30 10:20:01,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 10:20:01,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-09-30 10:20:01,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 316. [2018-09-30 10:20:01,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-09-30 10:20:01,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 342 transitions. [2018-09-30 10:20:01,969 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 342 transitions. Word has length 303 [2018-09-30 10:20:01,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:01,969 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 342 transitions. [2018-09-30 10:20:01,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 10:20:01,969 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 342 transitions. [2018-09-30 10:20:01,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-09-30 10:20:01,971 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:01,971 INFO L375 BasicCegarLoop]: trace histogram [260, 26, 26, 1, 1, 1] [2018-09-30 10:20:01,972 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:01,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:01,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1243510663, now seen corresponding path program 29 times [2018-09-30 10:20:01,972 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:01,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:01,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:01,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:01,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:02,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 41106 backedges. 0 proven. 39676 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-09-30 10:20:02,840 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:02,840 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:20:02,847 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:20:03,277 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 157 check-sat command(s) [2018-09-30 10:20:03,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:03,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:03,369 INFO L134 CoverageAnalysis]: Checked inductivity of 41106 backedges. 0 proven. 39676 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-09-30 10:20:03,390 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:03,390 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 10:20:03,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 10:20:03,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 10:20:03,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 10:20:03,391 INFO L87 Difference]: Start difference. First operand 316 states and 342 transitions. Second operand 29 states. [2018-09-30 10:20:03,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:03,711 INFO L93 Difference]: Finished difference Result 341 states and 369 transitions. [2018-09-30 10:20:03,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 10:20:03,711 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 315 [2018-09-30 10:20:03,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:03,713 INFO L225 Difference]: With dead ends: 341 [2018-09-30 10:20:03,713 INFO L226 Difference]: Without dead ends: 339 [2018-09-30 10:20:03,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 10:20:03,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-09-30 10:20:03,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 328. [2018-09-30 10:20:03,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-09-30 10:20:03,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 355 transitions. [2018-09-30 10:20:03,833 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 355 transitions. Word has length 315 [2018-09-30 10:20:03,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:03,833 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 355 transitions. [2018-09-30 10:20:03,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 10:20:03,833 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 355 transitions. [2018-09-30 10:20:03,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-09-30 10:20:03,835 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:03,835 INFO L375 BasicCegarLoop]: trace histogram [270, 27, 27, 1, 1, 1] [2018-09-30 10:20:03,836 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:03,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:03,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1907644207, now seen corresponding path program 30 times [2018-09-30 10:20:03,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:03,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:03,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:03,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:03,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:03,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 44334 backedges. 0 proven. 42849 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2018-09-30 10:20:04,643 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:04,643 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:20:04,651 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:20:05,112 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 158 check-sat command(s) [2018-09-30 10:20:05,112 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:05,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:05,228 INFO L134 CoverageAnalysis]: Checked inductivity of 44334 backedges. 0 proven. 42849 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2018-09-30 10:20:05,260 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:05,260 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 10:20:05,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 10:20:05,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 10:20:05,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:20:05,262 INFO L87 Difference]: Start difference. First operand 328 states and 355 transitions. Second operand 30 states. [2018-09-30 10:20:05,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:05,560 INFO L93 Difference]: Finished difference Result 353 states and 382 transitions. [2018-09-30 10:20:05,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 10:20:05,560 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 327 [2018-09-30 10:20:05,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:05,562 INFO L225 Difference]: With dead ends: 353 [2018-09-30 10:20:05,562 INFO L226 Difference]: Without dead ends: 351 [2018-09-30 10:20:05,563 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 [2018-09-30 10:20:05,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-09-30 10:20:05,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 340. [2018-09-30 10:20:05,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-09-30 10:20:05,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 368 transitions. [2018-09-30 10:20:05,664 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 368 transitions. Word has length 327 [2018-09-30 10:20:05,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:05,664 INFO L480 AbstractCegarLoop]: Abstraction has 340 states and 368 transitions. [2018-09-30 10:20:05,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 10:20:05,664 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 368 transitions. [2018-09-30 10:20:05,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-09-30 10:20:05,666 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:05,666 INFO L375 BasicCegarLoop]: trace histogram [280, 28, 28, 1, 1, 1] [2018-09-30 10:20:05,666 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:05,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:05,666 INFO L82 PathProgramCache]: Analyzing trace with hash -48809189, now seen corresponding path program 31 times [2018-09-30 10:20:05,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:05,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:05,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:05,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:05,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:05,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:06,465 INFO L134 CoverageAnalysis]: Checked inductivity of 47684 backedges. 0 proven. 46144 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-09-30 10:20:06,465 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:06,465 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:20:06,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:20:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:06,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:06,778 INFO L134 CoverageAnalysis]: Checked inductivity of 47684 backedges. 0 proven. 46144 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-09-30 10:20:06,799 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:06,799 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 10:20:06,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 10:20:06,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 10:20:06,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 10:20:06,800 INFO L87 Difference]: Start difference. First operand 340 states and 368 transitions. Second operand 31 states. [2018-09-30 10:20:07,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:07,063 INFO L93 Difference]: Finished difference Result 365 states and 395 transitions. [2018-09-30 10:20:07,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 10:20:07,063 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 339 [2018-09-30 10:20:07,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:07,065 INFO L225 Difference]: With dead ends: 365 [2018-09-30 10:20:07,065 INFO L226 Difference]: Without dead ends: 363 [2018-09-30 10:20:07,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 10:20:07,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-09-30 10:20:07,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 352. [2018-09-30 10:20:07,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-09-30 10:20:07,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 381 transitions. [2018-09-30 10:20:07,188 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 381 transitions. Word has length 339 [2018-09-30 10:20:07,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:07,188 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 381 transitions. [2018-09-30 10:20:07,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 10:20:07,189 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 381 transitions. [2018-09-30 10:20:07,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-09-30 10:20:07,190 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:07,191 INFO L375 BasicCegarLoop]: trace histogram [290, 29, 29, 1, 1, 1] [2018-09-30 10:20:07,191 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:07,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:07,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1056419429, now seen corresponding path program 32 times [2018-09-30 10:20:07,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:07,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:07,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:07,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:20:07,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:07,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 51156 backedges. 0 proven. 49561 refuted. 0 times theorem prover too weak. 1595 trivial. 0 not checked. [2018-09-30 10:20:08,711 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:08,711 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:20:08,718 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:20:08,904 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:20:08,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:08,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:09,011 INFO L134 CoverageAnalysis]: Checked inductivity of 51156 backedges. 0 proven. 49561 refuted. 0 times theorem prover too weak. 1595 trivial. 0 not checked. [2018-09-30 10:20:09,034 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:09,035 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 10:20:09,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 10:20:09,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 10:20:09,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:20:09,036 INFO L87 Difference]: Start difference. First operand 352 states and 381 transitions. Second operand 32 states. [2018-09-30 10:20:09,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:09,340 INFO L93 Difference]: Finished difference Result 377 states and 408 transitions. [2018-09-30 10:20:09,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 10:20:09,341 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 351 [2018-09-30 10:20:09,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:09,342 INFO L225 Difference]: With dead ends: 377 [2018-09-30 10:20:09,342 INFO L226 Difference]: Without dead ends: 375 [2018-09-30 10:20:09,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:20:09,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2018-09-30 10:20:09,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 364. [2018-09-30 10:20:09,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-09-30 10:20:09,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 394 transitions. [2018-09-30 10:20:09,462 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 394 transitions. Word has length 351 [2018-09-30 10:20:09,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:09,462 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 394 transitions. [2018-09-30 10:20:09,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 10:20:09,463 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 394 transitions. [2018-09-30 10:20:09,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-09-30 10:20:09,465 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:09,465 INFO L375 BasicCegarLoop]: trace histogram [300, 30, 30, 1, 1, 1] [2018-09-30 10:20:09,465 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:09,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:09,465 INFO L82 PathProgramCache]: Analyzing trace with hash 2124645039, now seen corresponding path program 33 times [2018-09-30 10:20:09,466 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:09,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:09,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:09,467 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:09,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:09,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:10,282 INFO L134 CoverageAnalysis]: Checked inductivity of 54750 backedges. 0 proven. 53100 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-09-30 10:20:10,282 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:10,282 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 [2018-09-30 10:20:10,290 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:20:10,878 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 181 check-sat command(s) [2018-09-30 10:20:10,878 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:10,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:11,102 INFO L134 CoverageAnalysis]: Checked inductivity of 54750 backedges. 0 proven. 53100 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-09-30 10:20:11,133 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:11,134 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 10:20:11,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 10:20:11,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 10:20:11,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 10:20:11,136 INFO L87 Difference]: Start difference. First operand 364 states and 394 transitions. Second operand 33 states. [2018-09-30 10:20:12,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:12,072 INFO L93 Difference]: Finished difference Result 389 states and 421 transitions. [2018-09-30 10:20:12,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 10:20:12,073 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 363 [2018-09-30 10:20:12,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:12,075 INFO L225 Difference]: With dead ends: 389 [2018-09-30 10:20:12,075 INFO L226 Difference]: Without dead ends: 387 [2018-09-30 10:20:12,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 10:20:12,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2018-09-30 10:20:12,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 376. [2018-09-30 10:20:12,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2018-09-30 10:20:12,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 407 transitions. [2018-09-30 10:20:12,201 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 407 transitions. Word has length 363 [2018-09-30 10:20:12,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:12,201 INFO L480 AbstractCegarLoop]: Abstraction has 376 states and 407 transitions. [2018-09-30 10:20:12,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 10:20:12,202 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 407 transitions. [2018-09-30 10:20:12,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-09-30 10:20:12,203 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:12,203 INFO L375 BasicCegarLoop]: trace histogram [310, 31, 31, 1, 1, 1] [2018-09-30 10:20:12,203 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:12,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:12,204 INFO L82 PathProgramCache]: Analyzing trace with hash 152123385, now seen corresponding path program 34 times [2018-09-30 10:20:12,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:12,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:12,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:12,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:12,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:12,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:12,899 INFO L134 CoverageAnalysis]: Checked inductivity of 58466 backedges. 0 proven. 56761 refuted. 0 times theorem prover too weak. 1705 trivial. 0 not checked. [2018-09-30 10:20:12,899 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:12,899 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 [2018-09-30 10:20:12,906 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:20:13,111 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:20:13,111 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:13,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:13,274 INFO L134 CoverageAnalysis]: Checked inductivity of 58466 backedges. 0 proven. 56761 refuted. 0 times theorem prover too weak. 1705 trivial. 0 not checked. [2018-09-30 10:20:13,311 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:13,311 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 10:20:13,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 10:20:13,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 10:20:13,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:20:13,313 INFO L87 Difference]: Start difference. First operand 376 states and 407 transitions. Second operand 34 states. [2018-09-30 10:20:13,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:13,674 INFO L93 Difference]: Finished difference Result 401 states and 434 transitions. [2018-09-30 10:20:13,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 10:20:13,674 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 375 [2018-09-30 10:20:13,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:13,676 INFO L225 Difference]: With dead ends: 401 [2018-09-30 10:20:13,676 INFO L226 Difference]: Without dead ends: 399 [2018-09-30 10:20:13,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:20:13,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-09-30 10:20:13,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 388. [2018-09-30 10:20:13,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-09-30 10:20:13,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 420 transitions. [2018-09-30 10:20:13,813 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 420 transitions. Word has length 375 [2018-09-30 10:20:13,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:13,814 INFO L480 AbstractCegarLoop]: Abstraction has 388 states and 420 transitions. [2018-09-30 10:20:13,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 10:20:13,814 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 420 transitions. [2018-09-30 10:20:13,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-09-30 10:20:13,816 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:13,816 INFO L375 BasicCegarLoop]: trace histogram [320, 32, 32, 1, 1, 1] [2018-09-30 10:20:13,817 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:13,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:13,817 INFO L82 PathProgramCache]: Analyzing trace with hash -310948285, now seen corresponding path program 35 times [2018-09-30 10:20:13,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:13,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:13,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:13,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:13,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:13,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 62304 backedges. 0 proven. 60544 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2018-09-30 10:20:14,650 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:14,650 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:20:14,685 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:20:15,320 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 193 check-sat command(s) [2018-09-30 10:20:15,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:15,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 62304 backedges. 0 proven. 60544 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2018-09-30 10:20:15,465 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:15,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 10:20:15,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 10:20:15,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 10:20:15,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 10:20:15,466 INFO L87 Difference]: Start difference. First operand 388 states and 420 transitions. Second operand 35 states. [2018-09-30 10:20:15,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:15,768 INFO L93 Difference]: Finished difference Result 413 states and 447 transitions. [2018-09-30 10:20:15,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 10:20:15,768 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 387 [2018-09-30 10:20:15,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:15,770 INFO L225 Difference]: With dead ends: 413 [2018-09-30 10:20:15,770 INFO L226 Difference]: Without dead ends: 411 [2018-09-30 10:20:15,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 10:20:15,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2018-09-30 10:20:15,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 400. [2018-09-30 10:20:15,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2018-09-30 10:20:15,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 433 transitions. [2018-09-30 10:20:15,914 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 433 transitions. Word has length 387 [2018-09-30 10:20:15,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:15,914 INFO L480 AbstractCegarLoop]: Abstraction has 400 states and 433 transitions. [2018-09-30 10:20:15,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 10:20:15,915 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 433 transitions. [2018-09-30 10:20:15,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-09-30 10:20:15,917 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:15,917 INFO L375 BasicCegarLoop]: trace histogram [330, 33, 33, 1, 1, 1] [2018-09-30 10:20:15,917 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:15,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:15,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1655945843, now seen corresponding path program 36 times [2018-09-30 10:20:15,918 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:15,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:15,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:15,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:15,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:16,627 INFO L134 CoverageAnalysis]: Checked inductivity of 66264 backedges. 0 proven. 64449 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2018-09-30 10:20:16,627 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:16,627 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:20:16,634 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:20:17,279 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 195 check-sat command(s) [2018-09-30 10:20:17,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:17,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 66264 backedges. 0 proven. 64449 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2018-09-30 10:20:17,442 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:17,442 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 10:20:17,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 10:20:17,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 10:20:17,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:20:17,444 INFO L87 Difference]: Start difference. First operand 400 states and 433 transitions. Second operand 36 states. [2018-09-30 10:20:17,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:17,795 INFO L93 Difference]: Finished difference Result 425 states and 460 transitions. [2018-09-30 10:20:17,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 10:20:17,796 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 399 [2018-09-30 10:20:17,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:17,798 INFO L225 Difference]: With dead ends: 425 [2018-09-30 10:20:17,798 INFO L226 Difference]: Without dead ends: 423 [2018-09-30 10:20:17,799 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 [2018-09-30 10:20:17,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2018-09-30 10:20:17,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 412. [2018-09-30 10:20:17,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-09-30 10:20:17,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 446 transitions. [2018-09-30 10:20:17,957 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 446 transitions. Word has length 399 [2018-09-30 10:20:17,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:17,957 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 446 transitions. [2018-09-30 10:20:17,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 10:20:17,957 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 446 transitions. [2018-09-30 10:20:17,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-09-30 10:20:17,960 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:17,960 INFO L375 BasicCegarLoop]: trace histogram [340, 34, 34, 1, 1, 1] [2018-09-30 10:20:17,960 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:17,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:17,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1941529129, now seen corresponding path program 37 times [2018-09-30 10:20:17,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:17,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:17,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:17,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:17,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 70346 backedges. 0 proven. 68476 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2018-09-30 10:20:18,863 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:18,864 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:20:18,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:20:19,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:19,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:19,223 INFO L134 CoverageAnalysis]: Checked inductivity of 70346 backedges. 0 proven. 68476 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2018-09-30 10:20:19,243 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:19,243 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 10:20:19,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 10:20:19,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 10:20:19,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 10:20:19,245 INFO L87 Difference]: Start difference. First operand 412 states and 446 transitions. Second operand 37 states. [2018-09-30 10:20:19,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:19,594 INFO L93 Difference]: Finished difference Result 437 states and 473 transitions. [2018-09-30 10:20:19,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 10:20:19,596 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 411 [2018-09-30 10:20:19,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:19,598 INFO L225 Difference]: With dead ends: 437 [2018-09-30 10:20:19,598 INFO L226 Difference]: Without dead ends: 435 [2018-09-30 10:20:19,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 10:20:19,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2018-09-30 10:20:19,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 424. [2018-09-30 10:20:19,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-09-30 10:20:19,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 459 transitions. [2018-09-30 10:20:19,768 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 459 transitions. Word has length 411 [2018-09-30 10:20:19,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:19,768 INFO L480 AbstractCegarLoop]: Abstraction has 424 states and 459 transitions. [2018-09-30 10:20:19,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 10:20:19,769 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 459 transitions. [2018-09-30 10:20:19,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-09-30 10:20:19,771 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:19,771 INFO L375 BasicCegarLoop]: trace histogram [350, 35, 35, 1, 1, 1] [2018-09-30 10:20:19,772 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:19,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:19,772 INFO L82 PathProgramCache]: Analyzing trace with hash -799221983, now seen corresponding path program 38 times [2018-09-30 10:20:19,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:19,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:19,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:19,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:20:19,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:20,741 INFO L134 CoverageAnalysis]: Checked inductivity of 74550 backedges. 0 proven. 72625 refuted. 0 times theorem prover too weak. 1925 trivial. 0 not checked. [2018-09-30 10:20:20,741 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:20,741 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 [2018-09-30 10:20:20,748 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:20:20,977 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:20:20,977 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:20,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:21,213 INFO L134 CoverageAnalysis]: Checked inductivity of 74550 backedges. 0 proven. 72625 refuted. 0 times theorem prover too weak. 1925 trivial. 0 not checked. [2018-09-30 10:20:21,248 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:21,249 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 10:20:21,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 10:20:21,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 10:20:21,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:20:21,250 INFO L87 Difference]: Start difference. First operand 424 states and 459 transitions. Second operand 38 states. [2018-09-30 10:20:22,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:22,270 INFO L93 Difference]: Finished difference Result 449 states and 486 transitions. [2018-09-30 10:20:22,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 10:20:22,270 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 423 [2018-09-30 10:20:22,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:22,272 INFO L225 Difference]: With dead ends: 449 [2018-09-30 10:20:22,273 INFO L226 Difference]: Without dead ends: 447 [2018-09-30 10:20:22,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:20:22,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-09-30 10:20:22,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 436. [2018-09-30 10:20:22,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2018-09-30 10:20:22,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 472 transitions. [2018-09-30 10:20:22,426 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 472 transitions. Word has length 423 [2018-09-30 10:20:22,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:22,427 INFO L480 AbstractCegarLoop]: Abstraction has 436 states and 472 transitions. [2018-09-30 10:20:22,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 10:20:22,427 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 472 transitions. [2018-09-30 10:20:22,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-09-30 10:20:22,430 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:22,430 INFO L375 BasicCegarLoop]: trace histogram [360, 36, 36, 1, 1, 1] [2018-09-30 10:20:22,430 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:22,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:22,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1044024981, now seen corresponding path program 39 times [2018-09-30 10:20:22,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:22,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:22,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:22,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:22,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:22,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:23,315 INFO L134 CoverageAnalysis]: Checked inductivity of 78876 backedges. 0 proven. 76896 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-09-30 10:20:23,315 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:23,315 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 [2018-09-30 10:20:23,323 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:20:24,093 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 217 check-sat command(s) [2018-09-30 10:20:24,093 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:24,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:24,265 INFO L134 CoverageAnalysis]: Checked inductivity of 78876 backedges. 0 proven. 76896 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-09-30 10:20:24,287 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:24,287 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 10:20:24,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 10:20:24,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 10:20:24,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 10:20:24,289 INFO L87 Difference]: Start difference. First operand 436 states and 472 transitions. Second operand 39 states. [2018-09-30 10:20:24,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:24,631 INFO L93 Difference]: Finished difference Result 461 states and 499 transitions. [2018-09-30 10:20:24,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 10:20:24,631 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 435 [2018-09-30 10:20:24,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:24,633 INFO L225 Difference]: With dead ends: 461 [2018-09-30 10:20:24,633 INFO L226 Difference]: Without dead ends: 459 [2018-09-30 10:20:24,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 10:20:24,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2018-09-30 10:20:24,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 448. [2018-09-30 10:20:24,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2018-09-30 10:20:24,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 485 transitions. [2018-09-30 10:20:24,808 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 485 transitions. Word has length 435 [2018-09-30 10:20:24,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:24,808 INFO L480 AbstractCegarLoop]: Abstraction has 448 states and 485 transitions. [2018-09-30 10:20:24,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 10:20:24,808 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 485 transitions. [2018-09-30 10:20:24,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2018-09-30 10:20:24,810 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:24,810 INFO L375 BasicCegarLoop]: trace histogram [370, 37, 37, 1, 1, 1] [2018-09-30 10:20:24,811 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:24,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:24,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1695093579, now seen corresponding path program 40 times [2018-09-30 10:20:24,811 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:24,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:24,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:24,812 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:24,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:26,385 INFO L134 CoverageAnalysis]: Checked inductivity of 83324 backedges. 0 proven. 81289 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2018-09-30 10:20:26,386 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:26,386 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 [2018-09-30 10:20:26,393 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:20:26,637 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:20:26,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:26,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 83324 backedges. 0 proven. 81289 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2018-09-30 10:20:26,813 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:26,814 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 10:20:26,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 10:20:26,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 10:20:26,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 10:20:26,815 INFO L87 Difference]: Start difference. First operand 448 states and 485 transitions. Second operand 40 states. [2018-09-30 10:20:27,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:27,219 INFO L93 Difference]: Finished difference Result 473 states and 512 transitions. [2018-09-30 10:20:27,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 10:20:27,225 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 447 [2018-09-30 10:20:27,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:27,227 INFO L225 Difference]: With dead ends: 473 [2018-09-30 10:20:27,227 INFO L226 Difference]: Without dead ends: 471 [2018-09-30 10:20:27,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 10:20:27,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2018-09-30 10:20:27,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 460. [2018-09-30 10:20:27,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2018-09-30 10:20:27,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 498 transitions. [2018-09-30 10:20:27,419 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 498 transitions. Word has length 447 [2018-09-30 10:20:27,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:27,420 INFO L480 AbstractCegarLoop]: Abstraction has 460 states and 498 transitions. [2018-09-30 10:20:27,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 10:20:27,420 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 498 transitions. [2018-09-30 10:20:27,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2018-09-30 10:20:27,422 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:27,423 INFO L375 BasicCegarLoop]: trace histogram [380, 38, 38, 1, 1, 1] [2018-09-30 10:20:27,423 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:27,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:27,423 INFO L82 PathProgramCache]: Analyzing trace with hash 413649151, now seen corresponding path program 41 times [2018-09-30 10:20:27,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:27,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:27,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:27,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:27,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:27,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 87894 backedges. 0 proven. 85804 refuted. 0 times theorem prover too weak. 2090 trivial. 0 not checked. [2018-09-30 10:20:28,789 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:28,789 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 [2018-09-30 10:20:28,795 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:20:29,618 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 229 check-sat command(s) [2018-09-30 10:20:29,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:29,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 87894 backedges. 0 proven. 85804 refuted. 0 times theorem prover too weak. 2090 trivial. 0 not checked. [2018-09-30 10:20:29,838 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:29,838 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 10:20:29,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 10:20:29,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 10:20:29,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 10:20:29,839 INFO L87 Difference]: Start difference. First operand 460 states and 498 transitions. Second operand 41 states. [2018-09-30 10:20:30,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:30,433 INFO L93 Difference]: Finished difference Result 485 states and 525 transitions. [2018-09-30 10:20:30,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 10:20:30,433 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 459 [2018-09-30 10:20:30,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:30,435 INFO L225 Difference]: With dead ends: 485 [2018-09-30 10:20:30,435 INFO L226 Difference]: Without dead ends: 483 [2018-09-30 10:20:30,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 10:20:30,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2018-09-30 10:20:30,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 472. [2018-09-30 10:20:30,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 472 states. [2018-09-30 10:20:30,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 511 transitions. [2018-09-30 10:20:30,634 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 511 transitions. Word has length 459 [2018-09-30 10:20:30,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:30,634 INFO L480 AbstractCegarLoop]: Abstraction has 472 states and 511 transitions. [2018-09-30 10:20:30,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 10:20:30,634 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 511 transitions. [2018-09-30 10:20:30,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2018-09-30 10:20:30,636 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:30,636 INFO L375 BasicCegarLoop]: trace histogram [390, 39, 39, 1, 1, 1] [2018-09-30 10:20:30,637 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:30,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:30,637 INFO L82 PathProgramCache]: Analyzing trace with hash 432965193, now seen corresponding path program 42 times [2018-09-30 10:20:30,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:30,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:30,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:30,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:30,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:30,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:31,839 INFO L134 CoverageAnalysis]: Checked inductivity of 92586 backedges. 0 proven. 90441 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-09-30 10:20:31,839 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:31,839 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 [2018-09-30 10:20:31,847 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:20:32,705 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 230 check-sat command(s) [2018-09-30 10:20:32,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:32,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:32,867 INFO L134 CoverageAnalysis]: Checked inductivity of 92586 backedges. 0 proven. 90441 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-09-30 10:20:32,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:32,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 10:20:32,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 10:20:32,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 10:20:32,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:20:32,889 INFO L87 Difference]: Start difference. First operand 472 states and 511 transitions. Second operand 42 states. [2018-09-30 10:20:33,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:33,294 INFO L93 Difference]: Finished difference Result 497 states and 538 transitions. [2018-09-30 10:20:33,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 10:20:33,295 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 471 [2018-09-30 10:20:33,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:33,297 INFO L225 Difference]: With dead ends: 497 [2018-09-30 10:20:33,297 INFO L226 Difference]: Without dead ends: 495 [2018-09-30 10:20:33,298 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 [2018-09-30 10:20:33,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-09-30 10:20:33,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 484. [2018-09-30 10:20:33,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2018-09-30 10:20:33,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 524 transitions. [2018-09-30 10:20:33,560 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 524 transitions. Word has length 471 [2018-09-30 10:20:33,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:33,560 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 524 transitions. [2018-09-30 10:20:33,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 10:20:33,561 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 524 transitions. [2018-09-30 10:20:33,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2018-09-30 10:20:33,564 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:33,565 INFO L375 BasicCegarLoop]: trace histogram [400, 40, 40, 1, 1, 1] [2018-09-30 10:20:33,565 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:33,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:33,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1067558035, now seen corresponding path program 43 times [2018-09-30 10:20:33,566 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:33,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:33,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:33,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:33,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:33,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:34,511 INFO L134 CoverageAnalysis]: Checked inductivity of 97400 backedges. 0 proven. 95200 refuted. 0 times theorem prover too weak. 2200 trivial. 0 not checked. [2018-09-30 10:20:34,512 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:34,512 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 [2018-09-30 10:20:34,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:20:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:34,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:34,944 INFO L134 CoverageAnalysis]: Checked inductivity of 97400 backedges. 0 proven. 95200 refuted. 0 times theorem prover too weak. 2200 trivial. 0 not checked. [2018-09-30 10:20:34,965 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:34,965 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 10:20:34,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 10:20:34,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 10:20:34,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 10:20:34,967 INFO L87 Difference]: Start difference. First operand 484 states and 524 transitions. Second operand 43 states. [2018-09-30 10:20:35,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:35,385 INFO L93 Difference]: Finished difference Result 509 states and 551 transitions. [2018-09-30 10:20:35,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 10:20:35,386 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 483 [2018-09-30 10:20:35,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:35,388 INFO L225 Difference]: With dead ends: 509 [2018-09-30 10:20:35,388 INFO L226 Difference]: Without dead ends: 507 [2018-09-30 10:20:35,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 10:20:35,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2018-09-30 10:20:35,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 496. [2018-09-30 10:20:35,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2018-09-30 10:20:35,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 537 transitions. [2018-09-30 10:20:35,598 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 537 transitions. Word has length 483 [2018-09-30 10:20:35,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:35,598 INFO L480 AbstractCegarLoop]: Abstraction has 496 states and 537 transitions. [2018-09-30 10:20:35,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 10:20:35,598 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 537 transitions. [2018-09-30 10:20:35,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2018-09-30 10:20:35,600 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:35,601 INFO L375 BasicCegarLoop]: trace histogram [410, 41, 41, 1, 1, 1] [2018-09-30 10:20:35,601 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:35,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:35,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1919441955, now seen corresponding path program 44 times [2018-09-30 10:20:35,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:35,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:35,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:35,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:20:35,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:35,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:36,841 INFO L134 CoverageAnalysis]: Checked inductivity of 102336 backedges. 0 proven. 100081 refuted. 0 times theorem prover too weak. 2255 trivial. 0 not checked. [2018-09-30 10:20:36,841 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:36,841 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 [2018-09-30 10:20:36,848 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:20:37,117 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:20:37,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:37,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 102336 backedges. 0 proven. 100081 refuted. 0 times theorem prover too weak. 2255 trivial. 0 not checked. [2018-09-30 10:20:37,316 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:37,316 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 10:20:37,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 10:20:37,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 10:20:37,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:20:37,317 INFO L87 Difference]: Start difference. First operand 496 states and 537 transitions. Second operand 44 states. [2018-09-30 10:20:37,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:37,762 INFO L93 Difference]: Finished difference Result 521 states and 564 transitions. [2018-09-30 10:20:37,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 10:20:37,762 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 495 [2018-09-30 10:20:37,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:37,764 INFO L225 Difference]: With dead ends: 521 [2018-09-30 10:20:37,764 INFO L226 Difference]: Without dead ends: 519 [2018-09-30 10:20:37,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:20:37,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2018-09-30 10:20:37,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 508. [2018-09-30 10:20:37,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2018-09-30 10:20:37,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 550 transitions. [2018-09-30 10:20:37,984 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 550 transitions. Word has length 495 [2018-09-30 10:20:37,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:37,985 INFO L480 AbstractCegarLoop]: Abstraction has 508 states and 550 transitions. [2018-09-30 10:20:37,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 10:20:37,985 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 550 transitions. [2018-09-30 10:20:37,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2018-09-30 10:20:37,987 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:37,987 INFO L375 BasicCegarLoop]: trace histogram [420, 42, 42, 1, 1, 1] [2018-09-30 10:20:37,987 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:37,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:37,988 INFO L82 PathProgramCache]: Analyzing trace with hash 157746215, now seen corresponding path program 45 times [2018-09-30 10:20:37,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:37,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:37,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:37,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:37,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:38,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:38,935 INFO L134 CoverageAnalysis]: Checked inductivity of 107394 backedges. 0 proven. 105084 refuted. 0 times theorem prover too weak. 2310 trivial. 0 not checked. [2018-09-30 10:20:38,936 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:38,936 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 [2018-09-30 10:20:38,943 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:20:40,083 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 253 check-sat command(s) [2018-09-30 10:20:40,083 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:40,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 107394 backedges. 0 proven. 105084 refuted. 0 times theorem prover too weak. 2310 trivial. 0 not checked. [2018-09-30 10:20:40,359 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:40,359 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 10:20:40,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 10:20:40,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 10:20:40,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 10:20:40,360 INFO L87 Difference]: Start difference. First operand 508 states and 550 transitions. Second operand 45 states. [2018-09-30 10:20:41,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:41,232 INFO L93 Difference]: Finished difference Result 533 states and 577 transitions. [2018-09-30 10:20:41,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 10:20:41,239 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 507 [2018-09-30 10:20:41,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:41,241 INFO L225 Difference]: With dead ends: 533 [2018-09-30 10:20:41,241 INFO L226 Difference]: Without dead ends: 531 [2018-09-30 10:20:41,242 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 507 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 10:20:41,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2018-09-30 10:20:41,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 520. [2018-09-30 10:20:41,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2018-09-30 10:20:41,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 563 transitions. [2018-09-30 10:20:41,491 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 563 transitions. Word has length 507 [2018-09-30 10:20:41,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:41,491 INFO L480 AbstractCegarLoop]: Abstraction has 520 states and 563 transitions. [2018-09-30 10:20:41,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 10:20:41,491 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 563 transitions. [2018-09-30 10:20:41,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2018-09-30 10:20:41,493 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:41,494 INFO L375 BasicCegarLoop]: trace histogram [430, 43, 43, 1, 1, 1] [2018-09-30 10:20:41,494 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:41,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:41,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1527137649, now seen corresponding path program 46 times [2018-09-30 10:20:41,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:41,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:41,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:41,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:41,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:41,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 112574 backedges. 0 proven. 110209 refuted. 0 times theorem prover too weak. 2365 trivial. 0 not checked. [2018-09-30 10:20:42,506 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:42,506 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 [2018-09-30 10:20:42,513 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:20:42,798 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:20:42,798 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:42,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:42,998 INFO L134 CoverageAnalysis]: Checked inductivity of 112574 backedges. 0 proven. 110209 refuted. 0 times theorem prover too weak. 2365 trivial. 0 not checked. [2018-09-30 10:20:43,019 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:43,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 10:20:43,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 10:20:43,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 10:20:43,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:20:43,021 INFO L87 Difference]: Start difference. First operand 520 states and 563 transitions. Second operand 46 states. [2018-09-30 10:20:43,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:43,644 INFO L93 Difference]: Finished difference Result 545 states and 590 transitions. [2018-09-30 10:20:43,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 10:20:43,648 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 519 [2018-09-30 10:20:43,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:43,650 INFO L225 Difference]: With dead ends: 545 [2018-09-30 10:20:43,650 INFO L226 Difference]: Without dead ends: 543 [2018-09-30 10:20:43,651 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 [2018-09-30 10:20:43,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2018-09-30 10:20:43,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 532. [2018-09-30 10:20:43,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2018-09-30 10:20:43,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 576 transitions. [2018-09-30 10:20:43,931 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 576 transitions. Word has length 519 [2018-09-30 10:20:43,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:43,931 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 576 transitions. [2018-09-30 10:20:43,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 10:20:43,931 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 576 transitions. [2018-09-30 10:20:43,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2018-09-30 10:20:43,933 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:43,934 INFO L375 BasicCegarLoop]: trace histogram [440, 44, 44, 1, 1, 1] [2018-09-30 10:20:43,934 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:43,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:43,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1823205307, now seen corresponding path program 47 times [2018-09-30 10:20:43,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:43,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:43,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:43,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:43,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:43,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:44,996 INFO L134 CoverageAnalysis]: Checked inductivity of 117876 backedges. 0 proven. 115456 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2018-09-30 10:20:44,996 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:44,997 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 [2018-09-30 10:20:45,005 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:20:46,121 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 265 check-sat command(s) [2018-09-30 10:20:46,122 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:46,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 117876 backedges. 0 proven. 115456 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2018-09-30 10:20:46,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:46,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 10:20:46,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 10:20:46,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 10:20:46,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 10:20:46,375 INFO L87 Difference]: Start difference. First operand 532 states and 576 transitions. Second operand 47 states. [2018-09-30 10:20:46,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:46,957 INFO L93 Difference]: Finished difference Result 557 states and 603 transitions. [2018-09-30 10:20:46,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 10:20:46,957 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 531 [2018-09-30 10:20:46,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:46,959 INFO L225 Difference]: With dead ends: 557 [2018-09-30 10:20:46,959 INFO L226 Difference]: Without dead ends: 555 [2018-09-30 10:20:46,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 531 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 10:20:46,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2018-09-30 10:20:47,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 544. [2018-09-30 10:20:47,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2018-09-30 10:20:47,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 589 transitions. [2018-09-30 10:20:47,248 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 589 transitions. Word has length 531 [2018-09-30 10:20:47,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:47,248 INFO L480 AbstractCegarLoop]: Abstraction has 544 states and 589 transitions. [2018-09-30 10:20:47,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 10:20:47,248 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 589 transitions. [2018-09-30 10:20:47,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2018-09-30 10:20:47,251 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:47,251 INFO L375 BasicCegarLoop]: trace histogram [450, 45, 45, 1, 1, 1] [2018-09-30 10:20:47,251 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:47,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:47,251 INFO L82 PathProgramCache]: Analyzing trace with hash 181299973, now seen corresponding path program 48 times [2018-09-30 10:20:47,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:47,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:47,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:47,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:47,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:47,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 123300 backedges. 0 proven. 120825 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2018-09-30 10:20:48,426 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:48,426 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 [2018-09-30 10:20:48,433 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:20:49,571 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 267 check-sat command(s) [2018-09-30 10:20:49,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:49,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 123300 backedges. 0 proven. 120825 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2018-09-30 10:20:49,817 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:49,817 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 10:20:49,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 10:20:49,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 10:20:49,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:20:49,819 INFO L87 Difference]: Start difference. First operand 544 states and 589 transitions. Second operand 48 states. [2018-09-30 10:20:50,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:50,369 INFO L93 Difference]: Finished difference Result 569 states and 616 transitions. [2018-09-30 10:20:50,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 10:20:50,369 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 543 [2018-09-30 10:20:50,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:50,371 INFO L225 Difference]: With dead ends: 569 [2018-09-30 10:20:50,371 INFO L226 Difference]: Without dead ends: 567 [2018-09-30 10:20:50,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:20:50,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2018-09-30 10:20:50,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 556. [2018-09-30 10:20:50,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2018-09-30 10:20:50,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 602 transitions. [2018-09-30 10:20:50,649 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 602 transitions. Word has length 543 [2018-09-30 10:20:50,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:50,650 INFO L480 AbstractCegarLoop]: Abstraction has 556 states and 602 transitions. [2018-09-30 10:20:50,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 10:20:50,650 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 602 transitions. [2018-09-30 10:20:50,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2018-09-30 10:20:50,652 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:50,652 INFO L375 BasicCegarLoop]: trace histogram [460, 46, 46, 1, 1, 1] [2018-09-30 10:20:50,653 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:50,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:50,653 INFO L82 PathProgramCache]: Analyzing trace with hash -2077995185, now seen corresponding path program 49 times [2018-09-30 10:20:50,653 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:50,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:50,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:50,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:50,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:50,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 128846 backedges. 0 proven. 126316 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2018-09-30 10:20:52,018 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:52,018 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 [2018-09-30 10:20:52,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:20:52,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:52,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:52,580 INFO L134 CoverageAnalysis]: Checked inductivity of 128846 backedges. 0 proven. 126316 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2018-09-30 10:20:52,601 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:52,601 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 10:20:52,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 10:20:52,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 10:20:52,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 10:20:52,603 INFO L87 Difference]: Start difference. First operand 556 states and 602 transitions. Second operand 49 states. [2018-09-30 10:20:53,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:53,185 INFO L93 Difference]: Finished difference Result 581 states and 629 transitions. [2018-09-30 10:20:53,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 10:20:53,185 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 555 [2018-09-30 10:20:53,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:53,187 INFO L225 Difference]: With dead ends: 581 [2018-09-30 10:20:53,187 INFO L226 Difference]: Without dead ends: 579 [2018-09-30 10:20:53,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 555 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 10:20:53,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2018-09-30 10:20:53,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 568. [2018-09-30 10:20:53,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568 states. [2018-09-30 10:20:53,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 615 transitions. [2018-09-30 10:20:53,460 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 615 transitions. Word has length 555 [2018-09-30 10:20:53,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:53,461 INFO L480 AbstractCegarLoop]: Abstraction has 568 states and 615 transitions. [2018-09-30 10:20:53,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 10:20:53,461 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 615 transitions. [2018-09-30 10:20:53,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2018-09-30 10:20:53,464 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:53,464 INFO L375 BasicCegarLoop]: trace histogram [470, 47, 47, 1, 1, 1] [2018-09-30 10:20:53,464 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:53,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:53,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1235489945, now seen corresponding path program 50 times [2018-09-30 10:20:53,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:53,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:53,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:53,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:20:53,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:54,634 INFO L134 CoverageAnalysis]: Checked inductivity of 134514 backedges. 0 proven. 131929 refuted. 0 times theorem prover too weak. 2585 trivial. 0 not checked. [2018-09-30 10:20:54,634 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:54,634 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 [2018-09-30 10:20:54,643 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:20:54,952 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:20:54,952 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:54,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:55,185 INFO L134 CoverageAnalysis]: Checked inductivity of 134514 backedges. 0 proven. 131929 refuted. 0 times theorem prover too weak. 2585 trivial. 0 not checked. [2018-09-30 10:20:55,205 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:55,206 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 10:20:55,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 10:20:55,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 10:20:55,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:20:55,207 INFO L87 Difference]: Start difference. First operand 568 states and 615 transitions. Second operand 50 states. [2018-09-30 10:20:55,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:55,781 INFO L93 Difference]: Finished difference Result 593 states and 642 transitions. [2018-09-30 10:20:55,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 10:20:55,781 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 567 [2018-09-30 10:20:55,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:55,783 INFO L225 Difference]: With dead ends: 593 [2018-09-30 10:20:55,784 INFO L226 Difference]: Without dead ends: 591 [2018-09-30 10:20:55,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:20:55,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2018-09-30 10:20:56,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 580. [2018-09-30 10:20:56,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 580 states. [2018-09-30 10:20:56,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 628 transitions. [2018-09-30 10:20:56,153 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 628 transitions. Word has length 567 [2018-09-30 10:20:56,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:56,154 INFO L480 AbstractCegarLoop]: Abstraction has 580 states and 628 transitions. [2018-09-30 10:20:56,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 10:20:56,154 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 628 transitions. [2018-09-30 10:20:56,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2018-09-30 10:20:56,156 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:56,156 INFO L375 BasicCegarLoop]: trace histogram [480, 48, 48, 1, 1, 1] [2018-09-30 10:20:56,157 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:56,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:56,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1903936797, now seen corresponding path program 51 times [2018-09-30 10:20:56,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:56,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:56,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:56,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:56,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:56,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:57,622 INFO L134 CoverageAnalysis]: Checked inductivity of 140304 backedges. 0 proven. 137664 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2018-09-30 10:20:57,622 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:57,622 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 [2018-09-30 10:20:57,631 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:20:58,951 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 289 check-sat command(s) [2018-09-30 10:20:58,951 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:58,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:59,198 INFO L134 CoverageAnalysis]: Checked inductivity of 140304 backedges. 0 proven. 137664 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2018-09-30 10:20:59,220 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:59,220 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 10:20:59,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 10:20:59,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 10:20:59,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 10:20:59,222 INFO L87 Difference]: Start difference. First operand 580 states and 628 transitions. Second operand 51 states. [2018-09-30 10:20:59,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:59,842 INFO L93 Difference]: Finished difference Result 605 states and 655 transitions. [2018-09-30 10:20:59,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 10:20:59,843 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 579 [2018-09-30 10:20:59,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:59,845 INFO L225 Difference]: With dead ends: 605 [2018-09-30 10:20:59,845 INFO L226 Difference]: Without dead ends: 603 [2018-09-30 10:20:59,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 579 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 10:20:59,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2018-09-30 10:21:00,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 592. [2018-09-30 10:21:00,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2018-09-30 10:21:00,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 641 transitions. [2018-09-30 10:21:00,159 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 641 transitions. Word has length 579 [2018-09-30 10:21:00,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:00,160 INFO L480 AbstractCegarLoop]: Abstraction has 592 states and 641 transitions. [2018-09-30 10:21:00,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 10:21:00,160 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 641 transitions. [2018-09-30 10:21:00,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2018-09-30 10:21:00,162 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:00,162 INFO L375 BasicCegarLoop]: trace histogram [490, 49, 49, 1, 1, 1] [2018-09-30 10:21:00,163 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:00,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:00,163 INFO L82 PathProgramCache]: Analyzing trace with hash -398769619, now seen corresponding path program 52 times [2018-09-30 10:21:00,163 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:00,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:00,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:00,164 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:00,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:01,495 INFO L134 CoverageAnalysis]: Checked inductivity of 146216 backedges. 0 proven. 143521 refuted. 0 times theorem prover too weak. 2695 trivial. 0 not checked. [2018-09-30 10:21:01,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:01,496 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 [2018-09-30 10:21:01,504 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:21:01,821 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:21:01,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:01,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:02,076 INFO L134 CoverageAnalysis]: Checked inductivity of 146216 backedges. 0 proven. 143521 refuted. 0 times theorem prover too weak. 2695 trivial. 0 not checked. [2018-09-30 10:21:02,098 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:02,099 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 10:21:02,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 10:21:02,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 10:21:02,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 10:21:02,100 INFO L87 Difference]: Start difference. First operand 592 states and 641 transitions. Second operand 52 states. [2018-09-30 10:21:02,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:02,704 INFO L93 Difference]: Finished difference Result 617 states and 668 transitions. [2018-09-30 10:21:02,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 10:21:02,705 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 591 [2018-09-30 10:21:02,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:02,707 INFO L225 Difference]: With dead ends: 617 [2018-09-30 10:21:02,707 INFO L226 Difference]: Without dead ends: 615 [2018-09-30 10:21:02,708 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 [2018-09-30 10:21:02,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2018-09-30 10:21:03,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 604. [2018-09-30 10:21:03,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604 states. [2018-09-30 10:21:03,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 654 transitions. [2018-09-30 10:21:03,062 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 654 transitions. Word has length 591 [2018-09-30 10:21:03,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:03,062 INFO L480 AbstractCegarLoop]: Abstraction has 604 states and 654 transitions. [2018-09-30 10:21:03,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 10:21:03,062 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 654 transitions. [2018-09-30 10:21:03,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 604 [2018-09-30 10:21:03,065 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:03,065 INFO L375 BasicCegarLoop]: trace histogram [500, 50, 50, 1, 1, 1] [2018-09-30 10:21:03,065 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:03,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:03,066 INFO L82 PathProgramCache]: Analyzing trace with hash -293623177, now seen corresponding path program 53 times [2018-09-30 10:21:03,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:03,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:03,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:03,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:03,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:03,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:04,449 INFO L134 CoverageAnalysis]: Checked inductivity of 152250 backedges. 0 proven. 149500 refuted. 0 times theorem prover too weak. 2750 trivial. 0 not checked. [2018-09-30 10:21:04,449 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:04,450 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 [2018-09-30 10:21:04,459 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:21:05,809 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 301 check-sat command(s) [2018-09-30 10:21:05,809 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:05,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:06,067 INFO L134 CoverageAnalysis]: Checked inductivity of 152250 backedges. 0 proven. 149500 refuted. 0 times theorem prover too weak. 2750 trivial. 0 not checked. [2018-09-30 10:21:06,090 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:06,090 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 10:21:06,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 10:21:06,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 10:21:06,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 10:21:06,092 INFO L87 Difference]: Start difference. First operand 604 states and 654 transitions. Second operand 53 states. [2018-09-30 10:21:06,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:06,734 INFO L93 Difference]: Finished difference Result 629 states and 681 transitions. [2018-09-30 10:21:06,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 10:21:06,734 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 603 [2018-09-30 10:21:06,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:06,736 INFO L225 Difference]: With dead ends: 629 [2018-09-30 10:21:06,736 INFO L226 Difference]: Without dead ends: 627 [2018-09-30 10:21:06,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 603 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 10:21:06,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2018-09-30 10:21:07,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 616. [2018-09-30 10:21:07,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 616 states. [2018-09-30 10:21:07,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 667 transitions. [2018-09-30 10:21:07,060 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 667 transitions. Word has length 603 [2018-09-30 10:21:07,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:07,060 INFO L480 AbstractCegarLoop]: Abstraction has 616 states and 667 transitions. [2018-09-30 10:21:07,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 10:21:07,061 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 667 transitions. [2018-09-30 10:21:07,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2018-09-30 10:21:07,063 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:07,063 INFO L375 BasicCegarLoop]: trace histogram [510, 51, 51, 1, 1, 1] [2018-09-30 10:21:07,064 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:07,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:07,064 INFO L82 PathProgramCache]: Analyzing trace with hash -616041535, now seen corresponding path program 54 times [2018-09-30 10:21:07,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:07,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:07,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:07,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:07,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:07,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:08,733 INFO L134 CoverageAnalysis]: Checked inductivity of 158406 backedges. 0 proven. 155601 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2018-09-30 10:21:08,734 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:08,734 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 [2018-09-30 10:21:08,741 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:21:10,139 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 302 check-sat command(s) [2018-09-30 10:21:10,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:10,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:10,549 INFO L134 CoverageAnalysis]: Checked inductivity of 158406 backedges. 0 proven. 155601 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2018-09-30 10:21:10,570 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:10,571 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 10:21:10,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 10:21:10,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 10:21:10,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:21:10,572 INFO L87 Difference]: Start difference. First operand 616 states and 667 transitions. Second operand 54 states. [2018-09-30 10:21:11,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:11,204 INFO L93 Difference]: Finished difference Result 641 states and 694 transitions. [2018-09-30 10:21:11,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 10:21:11,204 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 615 [2018-09-30 10:21:11,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:11,207 INFO L225 Difference]: With dead ends: 641 [2018-09-30 10:21:11,207 INFO L226 Difference]: Without dead ends: 639 [2018-09-30 10:21:11,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 615 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:21:11,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2018-09-30 10:21:11,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 628. [2018-09-30 10:21:11,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2018-09-30 10:21:11,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 680 transitions. [2018-09-30 10:21:11,567 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 680 transitions. Word has length 615 [2018-09-30 10:21:11,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:11,568 INFO L480 AbstractCegarLoop]: Abstraction has 628 states and 680 transitions. [2018-09-30 10:21:11,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 10:21:11,568 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 680 transitions. [2018-09-30 10:21:11,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2018-09-30 10:21:11,571 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:11,571 INFO L375 BasicCegarLoop]: trace histogram [520, 52, 52, 1, 1, 1] [2018-09-30 10:21:11,571 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:11,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:11,572 INFO L82 PathProgramCache]: Analyzing trace with hash 717921803, now seen corresponding path program 55 times [2018-09-30 10:21:11,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:11,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:11,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:11,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:11,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:11,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:13,316 INFO L134 CoverageAnalysis]: Checked inductivity of 164684 backedges. 0 proven. 161824 refuted. 0 times theorem prover too weak. 2860 trivial. 0 not checked. [2018-09-30 10:21:13,316 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:13,316 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 [2018-09-30 10:21:13,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:21:13,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:13,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:13,969 INFO L134 CoverageAnalysis]: Checked inductivity of 164684 backedges. 0 proven. 161824 refuted. 0 times theorem prover too weak. 2860 trivial. 0 not checked. [2018-09-30 10:21:13,990 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:13,990 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 10:21:13,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 10:21:13,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 10:21:13,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 10:21:13,992 INFO L87 Difference]: Start difference. First operand 628 states and 680 transitions. Second operand 55 states. [2018-09-30 10:21:14,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:14,669 INFO L93 Difference]: Finished difference Result 653 states and 707 transitions. [2018-09-30 10:21:14,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 10:21:14,669 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 627 [2018-09-30 10:21:14,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:14,671 INFO L225 Difference]: With dead ends: 653 [2018-09-30 10:21:14,671 INFO L226 Difference]: Without dead ends: 651 [2018-09-30 10:21:14,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 627 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 10:21:14,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2018-09-30 10:21:15,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 640. [2018-09-30 10:21:15,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 640 states. [2018-09-30 10:21:15,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 693 transitions. [2018-09-30 10:21:15,049 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 693 transitions. Word has length 627 [2018-09-30 10:21:15,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:15,049 INFO L480 AbstractCegarLoop]: Abstraction has 640 states and 693 transitions. [2018-09-30 10:21:15,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 10:21:15,050 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 693 transitions. [2018-09-30 10:21:15,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2018-09-30 10:21:15,053 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:15,053 INFO L375 BasicCegarLoop]: trace histogram [530, 53, 53, 1, 1, 1] [2018-09-30 10:21:15,053 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:15,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:15,053 INFO L82 PathProgramCache]: Analyzing trace with hash 998123861, now seen corresponding path program 56 times [2018-09-30 10:21:15,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:15,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:15,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:15,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:21:15,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:15,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 171084 backedges. 0 proven. 168169 refuted. 0 times theorem prover too weak. 2915 trivial. 0 not checked. [2018-09-30 10:21:16,516 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:16,516 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:21:16,524 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:21:16,872 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:21:16,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:16,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:17,158 INFO L134 CoverageAnalysis]: Checked inductivity of 171084 backedges. 0 proven. 168169 refuted. 0 times theorem prover too weak. 2915 trivial. 0 not checked. [2018-09-30 10:21:17,179 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:17,179 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 10:21:17,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 10:21:17,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 10:21:17,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 10:21:17,181 INFO L87 Difference]: Start difference. First operand 640 states and 693 transitions. Second operand 56 states. [2018-09-30 10:21:17,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:17,966 INFO L93 Difference]: Finished difference Result 665 states and 720 transitions. [2018-09-30 10:21:17,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 10:21:17,966 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 639 [2018-09-30 10:21:17,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:17,968 INFO L225 Difference]: With dead ends: 665 [2018-09-30 10:21:17,968 INFO L226 Difference]: Without dead ends: 663 [2018-09-30 10:21:17,968 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 [2018-09-30 10:21:17,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2018-09-30 10:21:18,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 652. [2018-09-30 10:21:18,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2018-09-30 10:21:18,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 706 transitions. [2018-09-30 10:21:18,345 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 706 transitions. Word has length 639 [2018-09-30 10:21:18,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:18,345 INFO L480 AbstractCegarLoop]: Abstraction has 652 states and 706 transitions. [2018-09-30 10:21:18,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 10:21:18,345 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 706 transitions. [2018-09-30 10:21:18,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2018-09-30 10:21:18,348 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:18,348 INFO L375 BasicCegarLoop]: trace histogram [540, 54, 54, 1, 1, 1] [2018-09-30 10:21:18,348 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:18,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:18,349 INFO L82 PathProgramCache]: Analyzing trace with hash -300345953, now seen corresponding path program 57 times [2018-09-30 10:21:18,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:18,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:18,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:18,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:18,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:18,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:19,893 INFO L134 CoverageAnalysis]: Checked inductivity of 177606 backedges. 0 proven. 174636 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-09-30 10:21:19,894 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:19,894 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 [2018-09-30 10:21:19,900 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:21:21,532 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 325 check-sat command(s) [2018-09-30 10:21:21,532 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:21,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:21,805 INFO L134 CoverageAnalysis]: Checked inductivity of 177606 backedges. 0 proven. 174636 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-09-30 10:21:21,826 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:21,827 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 10:21:21,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 10:21:21,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 10:21:21,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 10:21:21,828 INFO L87 Difference]: Start difference. First operand 652 states and 706 transitions. Second operand 57 states. [2018-09-30 10:21:22,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:22,566 INFO L93 Difference]: Finished difference Result 677 states and 733 transitions. [2018-09-30 10:21:22,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 10:21:22,567 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 651 [2018-09-30 10:21:22,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:22,569 INFO L225 Difference]: With dead ends: 677 [2018-09-30 10:21:22,569 INFO L226 Difference]: Without dead ends: 675 [2018-09-30 10:21:22,570 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 [2018-09-30 10:21:22,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2018-09-30 10:21:22,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 664. [2018-09-30 10:21:22,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664 states. [2018-09-30 10:21:22,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 719 transitions. [2018-09-30 10:21:22,984 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 719 transitions. Word has length 651 [2018-09-30 10:21:22,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:22,985 INFO L480 AbstractCegarLoop]: Abstraction has 664 states and 719 transitions. [2018-09-30 10:21:22,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 10:21:22,985 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 719 transitions. [2018-09-30 10:21:22,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2018-09-30 10:21:22,988 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:22,988 INFO L375 BasicCegarLoop]: trace histogram [550, 55, 55, 1, 1, 1] [2018-09-30 10:21:22,988 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:22,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:22,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1167188713, now seen corresponding path program 58 times [2018-09-30 10:21:22,989 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:22,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:22,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:22,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:22,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:23,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:24,662 INFO L134 CoverageAnalysis]: Checked inductivity of 184250 backedges. 0 proven. 181225 refuted. 0 times theorem prover too weak. 3025 trivial. 0 not checked. [2018-09-30 10:21:24,662 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:24,662 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 [2018-09-30 10:21:24,676 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:21:25,037 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:21:25,038 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:25,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:25,351 INFO L134 CoverageAnalysis]: Checked inductivity of 184250 backedges. 0 proven. 181225 refuted. 0 times theorem prover too weak. 3025 trivial. 0 not checked. [2018-09-30 10:21:25,373 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:25,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 10:21:25,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 10:21:25,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 10:21:25,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:21:25,375 INFO L87 Difference]: Start difference. First operand 664 states and 719 transitions. Second operand 58 states. [2018-09-30 10:21:26,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:26,167 INFO L93 Difference]: Finished difference Result 689 states and 746 transitions. [2018-09-30 10:21:26,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 10:21:26,168 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 663 [2018-09-30 10:21:26,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:26,170 INFO L225 Difference]: With dead ends: 689 [2018-09-30 10:21:26,170 INFO L226 Difference]: Without dead ends: 687 [2018-09-30 10:21:26,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 663 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:21:26,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2018-09-30 10:21:26,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 676. [2018-09-30 10:21:26,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 676 states. [2018-09-30 10:21:26,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 732 transitions. [2018-09-30 10:21:26,583 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 732 transitions. Word has length 663 [2018-09-30 10:21:26,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:26,583 INFO L480 AbstractCegarLoop]: Abstraction has 676 states and 732 transitions. [2018-09-30 10:21:26,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 10:21:26,583 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 732 transitions. [2018-09-30 10:21:26,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 676 [2018-09-30 10:21:26,586 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:26,587 INFO L375 BasicCegarLoop]: trace histogram [560, 56, 56, 1, 1, 1] [2018-09-30 10:21:26,587 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:26,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:26,587 INFO L82 PathProgramCache]: Analyzing trace with hash 119476531, now seen corresponding path program 59 times [2018-09-30 10:21:26,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:26,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:26,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:26,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:26,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:28,592 INFO L134 CoverageAnalysis]: Checked inductivity of 191016 backedges. 0 proven. 187936 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-09-30 10:21:28,593 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:28,593 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 [2018-09-30 10:21:28,600 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:21:30,341 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 337 check-sat command(s) [2018-09-30 10:21:30,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:30,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:30,643 INFO L134 CoverageAnalysis]: Checked inductivity of 191016 backedges. 0 proven. 187936 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-09-30 10:21:30,666 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:30,667 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 10:21:30,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 10:21:30,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 10:21:30,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 10:21:30,668 INFO L87 Difference]: Start difference. First operand 676 states and 732 transitions. Second operand 59 states. [2018-09-30 10:21:31,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:31,459 INFO L93 Difference]: Finished difference Result 701 states and 759 transitions. [2018-09-30 10:21:31,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 10:21:31,459 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 675 [2018-09-30 10:21:31,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:31,462 INFO L225 Difference]: With dead ends: 701 [2018-09-30 10:21:31,462 INFO L226 Difference]: Without dead ends: 699 [2018-09-30 10:21:31,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 675 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 10:21:31,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2018-09-30 10:21:31,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 688. [2018-09-30 10:21:31,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 688 states. [2018-09-30 10:21:31,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 745 transitions. [2018-09-30 10:21:31,894 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 745 transitions. Word has length 675 [2018-09-30 10:21:31,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:31,894 INFO L480 AbstractCegarLoop]: Abstraction has 688 states and 745 transitions. [2018-09-30 10:21:31,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 10:21:31,894 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 745 transitions. [2018-09-30 10:21:31,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2018-09-30 10:21:31,897 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:31,898 INFO L375 BasicCegarLoop]: trace histogram [570, 57, 57, 1, 1, 1] [2018-09-30 10:21:31,898 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:31,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:31,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1513562237, now seen corresponding path program 60 times [2018-09-30 10:21:31,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:31,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:31,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:31,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:31,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:31,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:33,952 INFO L134 CoverageAnalysis]: Checked inductivity of 197904 backedges. 0 proven. 194769 refuted. 0 times theorem prover too weak. 3135 trivial. 0 not checked. [2018-09-30 10:21:33,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:33,952 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 [2018-09-30 10:21:33,961 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:21:35,766 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 339 check-sat command(s) [2018-09-30 10:21:35,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:35,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:36,071 INFO L134 CoverageAnalysis]: Checked inductivity of 197904 backedges. 0 proven. 194769 refuted. 0 times theorem prover too weak. 3135 trivial. 0 not checked. [2018-09-30 10:21:36,093 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:36,094 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 10:21:36,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 10:21:36,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 10:21:36,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:21:36,095 INFO L87 Difference]: Start difference. First operand 688 states and 745 transitions. Second operand 60 states. [2018-09-30 10:21:36,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:36,882 INFO L93 Difference]: Finished difference Result 713 states and 772 transitions. [2018-09-30 10:21:36,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 10:21:36,882 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 687 [2018-09-30 10:21:36,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:36,885 INFO L225 Difference]: With dead ends: 713 [2018-09-30 10:21:36,885 INFO L226 Difference]: Without dead ends: 711 [2018-09-30 10:21:36,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 687 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:21:36,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2018-09-30 10:21:37,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 700. [2018-09-30 10:21:37,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2018-09-30 10:21:37,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 758 transitions. [2018-09-30 10:21:37,340 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 758 transitions. Word has length 687 [2018-09-30 10:21:37,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:37,340 INFO L480 AbstractCegarLoop]: Abstraction has 700 states and 758 transitions. [2018-09-30 10:21:37,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 10:21:37,341 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 758 transitions. [2018-09-30 10:21:37,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 700 [2018-09-30 10:21:37,345 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:37,345 INFO L375 BasicCegarLoop]: trace histogram [580, 58, 58, 1, 1, 1] [2018-09-30 10:21:37,346 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:37,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:37,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1754304711, now seen corresponding path program 61 times [2018-09-30 10:21:37,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:37,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:37,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:37,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:37,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:39,314 INFO L134 CoverageAnalysis]: Checked inductivity of 204914 backedges. 0 proven. 201724 refuted. 0 times theorem prover too weak. 3190 trivial. 0 not checked. [2018-09-30 10:21:39,314 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:39,314 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:21:39,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:21:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:39,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:39,997 INFO L134 CoverageAnalysis]: Checked inductivity of 204914 backedges. 0 proven. 201724 refuted. 0 times theorem prover too weak. 3190 trivial. 0 not checked. [2018-09-30 10:21:40,018 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:40,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 10:21:40,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 10:21:40,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 10:21:40,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 10:21:40,020 INFO L87 Difference]: Start difference. First operand 700 states and 758 transitions. Second operand 61 states. [2018-09-30 10:21:40,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:40,855 INFO L93 Difference]: Finished difference Result 725 states and 785 transitions. [2018-09-30 10:21:40,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 10:21:40,856 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 699 [2018-09-30 10:21:40,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:40,858 INFO L225 Difference]: With dead ends: 725 [2018-09-30 10:21:40,858 INFO L226 Difference]: Without dead ends: 723 [2018-09-30 10:21:40,859 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 [2018-09-30 10:21:40,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2018-09-30 10:21:41,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 712. [2018-09-30 10:21:41,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2018-09-30 10:21:41,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 771 transitions. [2018-09-30 10:21:41,309 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 771 transitions. Word has length 699 [2018-09-30 10:21:41,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:41,310 INFO L480 AbstractCegarLoop]: Abstraction has 712 states and 771 transitions. [2018-09-30 10:21:41,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 10:21:41,310 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 771 transitions. [2018-09-30 10:21:41,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 712 [2018-09-30 10:21:41,313 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:41,314 INFO L375 BasicCegarLoop]: trace histogram [590, 59, 59, 1, 1, 1] [2018-09-30 10:21:41,314 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:41,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:41,314 INFO L82 PathProgramCache]: Analyzing trace with hash -31333871, now seen corresponding path program 62 times [2018-09-30 10:21:41,315 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:41,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:41,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:41,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:21:41,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 212046 backedges. 0 proven. 208801 refuted. 0 times theorem prover too weak. 3245 trivial. 0 not checked. [2018-09-30 10:21:43,514 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:43,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:21:43,523 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:21:43,900 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:21:43,901 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:43,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 212046 backedges. 0 proven. 208801 refuted. 0 times theorem prover too weak. 3245 trivial. 0 not checked. [2018-09-30 10:21:44,266 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:44,266 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 10:21:44,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 10:21:44,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 10:21:44,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 10:21:44,268 INFO L87 Difference]: Start difference. First operand 712 states and 771 transitions. Second operand 62 states. [2018-09-30 10:21:45,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:45,160 INFO L93 Difference]: Finished difference Result 737 states and 798 transitions. [2018-09-30 10:21:45,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 10:21:45,160 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 711 [2018-09-30 10:21:45,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:45,162 INFO L225 Difference]: With dead ends: 737 [2018-09-30 10:21:45,163 INFO L226 Difference]: Without dead ends: 735 [2018-09-30 10:21:45,163 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 711 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 10:21:45,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2018-09-30 10:21:45,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 724. [2018-09-30 10:21:45,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 724 states. [2018-09-30 10:21:45,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 784 transitions. [2018-09-30 10:21:45,630 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 784 transitions. Word has length 711 [2018-09-30 10:21:45,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:45,631 INFO L480 AbstractCegarLoop]: Abstraction has 724 states and 784 transitions. [2018-09-30 10:21:45,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 10:21:45,631 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 784 transitions. [2018-09-30 10:21:45,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2018-09-30 10:21:45,635 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:45,635 INFO L375 BasicCegarLoop]: trace histogram [600, 60, 60, 1, 1, 1] [2018-09-30 10:21:45,635 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:45,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:45,636 INFO L82 PathProgramCache]: Analyzing trace with hash 690066523, now seen corresponding path program 63 times [2018-09-30 10:21:45,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:45,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:45,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:45,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:45,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:45,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:47,477 INFO L134 CoverageAnalysis]: Checked inductivity of 219300 backedges. 0 proven. 216000 refuted. 0 times theorem prover too weak. 3300 trivial. 0 not checked. [2018-09-30 10:21:47,477 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:47,477 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 [2018-09-30 10:21:47,486 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:21:49,507 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 361 check-sat command(s) [2018-09-30 10:21:49,507 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:49,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:49,877 INFO L134 CoverageAnalysis]: Checked inductivity of 219300 backedges. 0 proven. 216000 refuted. 0 times theorem prover too weak. 3300 trivial. 0 not checked. [2018-09-30 10:21:49,899 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:49,899 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-30 10:21:49,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 10:21:49,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 10:21:49,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 10:21:49,901 INFO L87 Difference]: Start difference. First operand 724 states and 784 transitions. Second operand 63 states. [2018-09-30 10:21:51,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:51,154 INFO L93 Difference]: Finished difference Result 749 states and 811 transitions. [2018-09-30 10:21:51,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 10:21:51,155 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 723 [2018-09-30 10:21:51,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:51,158 INFO L225 Difference]: With dead ends: 749 [2018-09-30 10:21:51,159 INFO L226 Difference]: Without dead ends: 747 [2018-09-30 10:21:51,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 723 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 10:21:51,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2018-09-30 10:21:51,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 736. [2018-09-30 10:21:51,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2018-09-30 10:21:51,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 797 transitions. [2018-09-30 10:21:51,709 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 797 transitions. Word has length 723 [2018-09-30 10:21:51,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:51,709 INFO L480 AbstractCegarLoop]: Abstraction has 736 states and 797 transitions. [2018-09-30 10:21:51,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 10:21:51,709 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 797 transitions. [2018-09-30 10:21:51,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 736 [2018-09-30 10:21:51,713 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:51,713 INFO L375 BasicCegarLoop]: trace histogram [610, 61, 61, 1, 1, 1] [2018-09-30 10:21:51,713 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:51,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:51,714 INFO L82 PathProgramCache]: Analyzing trace with hash -637130843, now seen corresponding path program 64 times [2018-09-30 10:21:51,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:51,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:51,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:51,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:51,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:53,823 INFO L134 CoverageAnalysis]: Checked inductivity of 226676 backedges. 0 proven. 223321 refuted. 0 times theorem prover too weak. 3355 trivial. 0 not checked. [2018-09-30 10:21:53,823 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:53,823 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 [2018-09-30 10:21:53,830 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:21:54,232 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:21:54,232 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:54,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 226676 backedges. 0 proven. 223321 refuted. 0 times theorem prover too weak. 3355 trivial. 0 not checked. [2018-09-30 10:21:54,601 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:54,602 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 10:21:54,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 10:21:54,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 10:21:54,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 10:21:54,603 INFO L87 Difference]: Start difference. First operand 736 states and 797 transitions. Second operand 64 states. [2018-09-30 10:21:55,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:55,575 INFO L93 Difference]: Finished difference Result 761 states and 824 transitions. [2018-09-30 10:21:55,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 10:21:55,575 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 735 [2018-09-30 10:21:55,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:55,577 INFO L225 Difference]: With dead ends: 761 [2018-09-30 10:21:55,578 INFO L226 Difference]: Without dead ends: 759 [2018-09-30 10:21:55,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 735 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 10:21:55,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2018-09-30 10:21:56,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 748. [2018-09-30 10:21:56,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 748 states. [2018-09-30 10:21:56,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 810 transitions. [2018-09-30 10:21:56,079 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 810 transitions. Word has length 735 [2018-09-30 10:21:56,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:56,079 INFO L480 AbstractCegarLoop]: Abstraction has 748 states and 810 transitions. [2018-09-30 10:21:56,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 10:21:56,079 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 810 transitions. [2018-09-30 10:21:56,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 748 [2018-09-30 10:21:56,083 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:56,083 INFO L375 BasicCegarLoop]: trace histogram [620, 62, 62, 1, 1, 1] [2018-09-30 10:21:56,084 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:56,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:56,084 INFO L82 PathProgramCache]: Analyzing trace with hash -2088363025, now seen corresponding path program 65 times [2018-09-30 10:21:56,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:56,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:56,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:56,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:56,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:56,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 234174 backedges. 0 proven. 230764 refuted. 0 times theorem prover too weak. 3410 trivial. 0 not checked. [2018-09-30 10:21:58,108 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:58,109 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:21:58,117 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:22:00,264 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 373 check-sat command(s) [2018-09-30 10:22:00,264 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:00,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 234174 backedges. 0 proven. 230764 refuted. 0 times theorem prover too weak. 3410 trivial. 0 not checked. [2018-09-30 10:22:00,686 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:00,686 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 10:22:00,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 10:22:00,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 10:22:00,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 10:22:00,688 INFO L87 Difference]: Start difference. First operand 748 states and 810 transitions. Second operand 65 states. [2018-09-30 10:22:01,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:01,665 INFO L93 Difference]: Finished difference Result 773 states and 837 transitions. [2018-09-30 10:22:01,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 10:22:01,665 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 747 [2018-09-30 10:22:01,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:01,668 INFO L225 Difference]: With dead ends: 773 [2018-09-30 10:22:01,668 INFO L226 Difference]: Without dead ends: 771 [2018-09-30 10:22:01,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 810 GetRequests, 747 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 10:22:01,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2018-09-30 10:22:02,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 760. [2018-09-30 10:22:02,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 760 states. [2018-09-30 10:22:02,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 823 transitions. [2018-09-30 10:22:02,186 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 823 transitions. Word has length 747 [2018-09-30 10:22:02,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:02,186 INFO L480 AbstractCegarLoop]: Abstraction has 760 states and 823 transitions. [2018-09-30 10:22:02,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 10:22:02,187 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 823 transitions. [2018-09-30 10:22:02,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 760 [2018-09-30 10:22:02,190 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:02,190 INFO L375 BasicCegarLoop]: trace histogram [630, 63, 63, 1, 1, 1] [2018-09-30 10:22:02,191 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:02,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:02,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1164447431, now seen corresponding path program 66 times [2018-09-30 10:22:02,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:02,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:02,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:02,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:02,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 241794 backedges. 0 proven. 238329 refuted. 0 times theorem prover too weak. 3465 trivial. 0 not checked. [2018-09-30 10:22:04,506 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:04,506 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 [2018-09-30 10:22:04,514 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:22:06,746 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 374 check-sat command(s) [2018-09-30 10:22:06,746 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:06,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:07,138 INFO L134 CoverageAnalysis]: Checked inductivity of 241794 backedges. 0 proven. 238329 refuted. 0 times theorem prover too weak. 3465 trivial. 0 not checked. [2018-09-30 10:22:07,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:07,160 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-30 10:22:07,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 10:22:07,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 10:22:07,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 10:22:07,162 INFO L87 Difference]: Start difference. First operand 760 states and 823 transitions. Second operand 66 states. [2018-09-30 10:22:08,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:08,224 INFO L93 Difference]: Finished difference Result 785 states and 850 transitions. [2018-09-30 10:22:08,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 10:22:08,224 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 759 [2018-09-30 10:22:08,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:08,227 INFO L225 Difference]: With dead ends: 785 [2018-09-30 10:22:08,227 INFO L226 Difference]: Without dead ends: 783 [2018-09-30 10:22:08,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 823 GetRequests, 759 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 10:22:08,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2018-09-30 10:22:08,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 772. [2018-09-30 10:22:08,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 772 states. [2018-09-30 10:22:08,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 836 transitions. [2018-09-30 10:22:08,770 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 836 transitions. Word has length 759 [2018-09-30 10:22:08,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:08,771 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 836 transitions. [2018-09-30 10:22:08,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 10:22:08,771 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 836 transitions. [2018-09-30 10:22:08,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2018-09-30 10:22:08,774 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:08,775 INFO L375 BasicCegarLoop]: trace histogram [640, 64, 64, 1, 1, 1] [2018-09-30 10:22:08,775 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:08,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:08,775 INFO L82 PathProgramCache]: Analyzing trace with hash -697161853, now seen corresponding path program 67 times [2018-09-30 10:22:08,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:08,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:08,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:08,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:08,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:08,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:10,906 INFO L134 CoverageAnalysis]: Checked inductivity of 249536 backedges. 0 proven. 246016 refuted. 0 times theorem prover too weak. 3520 trivial. 0 not checked. [2018-09-30 10:22:10,906 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:10,906 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 [2018-09-30 10:22:10,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:22:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:11,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:11,722 INFO L134 CoverageAnalysis]: Checked inductivity of 249536 backedges. 0 proven. 246016 refuted. 0 times theorem prover too weak. 3520 trivial. 0 not checked. [2018-09-30 10:22:11,743 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:11,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 10:22:11,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 10:22:11,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 10:22:11,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 10:22:11,745 INFO L87 Difference]: Start difference. First operand 772 states and 836 transitions. Second operand 67 states. [2018-09-30 10:22:12,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:12,788 INFO L93 Difference]: Finished difference Result 797 states and 863 transitions. [2018-09-30 10:22:12,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 10:22:12,789 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 771 [2018-09-30 10:22:12,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:12,791 INFO L225 Difference]: With dead ends: 797 [2018-09-30 10:22:12,791 INFO L226 Difference]: Without dead ends: 795 [2018-09-30 10:22:12,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 836 GetRequests, 771 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 10:22:12,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2018-09-30 10:22:13,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 784. [2018-09-30 10:22:13,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2018-09-30 10:22:13,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 849 transitions. [2018-09-30 10:22:13,388 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 849 transitions. Word has length 771 [2018-09-30 10:22:13,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:13,389 INFO L480 AbstractCegarLoop]: Abstraction has 784 states and 849 transitions. [2018-09-30 10:22:13,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 10:22:13,389 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 849 transitions. [2018-09-30 10:22:13,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2018-09-30 10:22:13,393 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:13,393 INFO L375 BasicCegarLoop]: trace histogram [650, 65, 65, 1, 1, 1] [2018-09-30 10:22:13,393 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:13,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:13,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1869922611, now seen corresponding path program 68 times [2018-09-30 10:22:13,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:13,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:13,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:13,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:22:13,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 257400 backedges. 0 proven. 253825 refuted. 0 times theorem prover too weak. 3575 trivial. 0 not checked. [2018-09-30 10:22:15,569 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:15,569 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:22:15,577 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:22:16,010 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:22:16,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:16,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 257400 backedges. 0 proven. 253825 refuted. 0 times theorem prover too weak. 3575 trivial. 0 not checked. [2018-09-30 10:22:16,554 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:16,554 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 10:22:16,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 10:22:16,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 10:22:16,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 10:22:16,555 INFO L87 Difference]: Start difference. First operand 784 states and 849 transitions. Second operand 68 states. [2018-09-30 10:22:17,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:17,685 INFO L93 Difference]: Finished difference Result 809 states and 876 transitions. [2018-09-30 10:22:17,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 10:22:17,685 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 783 [2018-09-30 10:22:17,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:17,688 INFO L225 Difference]: With dead ends: 809 [2018-09-30 10:22:17,688 INFO L226 Difference]: Without dead ends: 807 [2018-09-30 10:22:17,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 783 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 10:22:17,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2018-09-30 10:22:18,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 796. [2018-09-30 10:22:18,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2018-09-30 10:22:18,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 862 transitions. [2018-09-30 10:22:18,275 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 862 transitions. Word has length 783 [2018-09-30 10:22:18,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:18,276 INFO L480 AbstractCegarLoop]: Abstraction has 796 states and 862 transitions. [2018-09-30 10:22:18,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 10:22:18,276 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 862 transitions. [2018-09-30 10:22:18,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2018-09-30 10:22:18,280 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:18,280 INFO L375 BasicCegarLoop]: trace histogram [660, 66, 66, 1, 1, 1] [2018-09-30 10:22:18,281 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:18,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:18,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1533429993, now seen corresponding path program 69 times [2018-09-30 10:22:18,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:18,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:18,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:18,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:18,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:20,438 INFO L134 CoverageAnalysis]: Checked inductivity of 265386 backedges. 0 proven. 261756 refuted. 0 times theorem prover too weak. 3630 trivial. 0 not checked. [2018-09-30 10:22:20,438 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:20,438 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 [2018-09-30 10:22:20,446 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:22:22,986 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 397 check-sat command(s) [2018-09-30 10:22:22,986 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:22,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:23,426 INFO L134 CoverageAnalysis]: Checked inductivity of 265386 backedges. 0 proven. 261756 refuted. 0 times theorem prover too weak. 3630 trivial. 0 not checked. [2018-09-30 10:22:23,449 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:23,450 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-30 10:22:23,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 10:22:23,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 10:22:23,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 10:22:23,451 INFO L87 Difference]: Start difference. First operand 796 states and 862 transitions. Second operand 69 states. [2018-09-30 10:22:24,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:24,526 INFO L93 Difference]: Finished difference Result 821 states and 889 transitions. [2018-09-30 10:22:24,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 10:22:24,526 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 795 [2018-09-30 10:22:24,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:24,529 INFO L225 Difference]: With dead ends: 821 [2018-09-30 10:22:24,529 INFO L226 Difference]: Without dead ends: 819 [2018-09-30 10:22:24,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 862 GetRequests, 795 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 10:22:24,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2018-09-30 10:22:25,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 808. [2018-09-30 10:22:25,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 808 states. [2018-09-30 10:22:25,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 875 transitions. [2018-09-30 10:22:25,131 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 875 transitions. Word has length 795 [2018-09-30 10:22:25,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:25,131 INFO L480 AbstractCegarLoop]: Abstraction has 808 states and 875 transitions. [2018-09-30 10:22:25,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 10:22:25,131 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 875 transitions. [2018-09-30 10:22:25,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2018-09-30 10:22:25,135 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:25,136 INFO L375 BasicCegarLoop]: trace histogram [670, 67, 67, 1, 1, 1] [2018-09-30 10:22:25,136 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:25,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:25,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1888751713, now seen corresponding path program 70 times [2018-09-30 10:22:25,136 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:25,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:25,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:25,137 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:25,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:25,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:27,366 INFO L134 CoverageAnalysis]: Checked inductivity of 273494 backedges. 0 proven. 269809 refuted. 0 times theorem prover too weak. 3685 trivial. 0 not checked. [2018-09-30 10:22:27,367 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:27,367 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 [2018-09-30 10:22:27,373 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:22:27,812 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:22:27,812 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:27,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 273494 backedges. 0 proven. 269809 refuted. 0 times theorem prover too weak. 3685 trivial. 0 not checked. [2018-09-30 10:22:28,239 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:28,239 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 10:22:28,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 10:22:28,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 10:22:28,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 10:22:28,241 INFO L87 Difference]: Start difference. First operand 808 states and 875 transitions. Second operand 70 states. [2018-09-30 10:22:29,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:29,427 INFO L93 Difference]: Finished difference Result 833 states and 902 transitions. [2018-09-30 10:22:29,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 10:22:29,428 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 807 [2018-09-30 10:22:29,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:29,431 INFO L225 Difference]: With dead ends: 833 [2018-09-30 10:22:29,431 INFO L226 Difference]: Without dead ends: 831 [2018-09-30 10:22:29,432 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 [2018-09-30 10:22:29,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2018-09-30 10:22:30,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 820. [2018-09-30 10:22:30,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 820 states. [2018-09-30 10:22:30,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 888 transitions. [2018-09-30 10:22:30,074 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 888 transitions. Word has length 807 [2018-09-30 10:22:30,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:30,075 INFO L480 AbstractCegarLoop]: Abstraction has 820 states and 888 transitions. [2018-09-30 10:22:30,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 10:22:30,075 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 888 transitions. [2018-09-30 10:22:30,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2018-09-30 10:22:30,079 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:30,080 INFO L375 BasicCegarLoop]: trace histogram [680, 68, 68, 1, 1, 1] [2018-09-30 10:22:30,080 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:30,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:30,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1800353109, now seen corresponding path program 71 times [2018-09-30 10:22:30,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:30,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:30,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:30,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:30,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:30,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 281724 backedges. 0 proven. 277984 refuted. 0 times theorem prover too weak. 3740 trivial. 0 not checked. [2018-09-30 10:22:32,482 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:32,482 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 [2018-09-30 10:22:32,488 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:22:35,160 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 409 check-sat command(s) [2018-09-30 10:22:35,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:35,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:35,639 INFO L134 CoverageAnalysis]: Checked inductivity of 281724 backedges. 0 proven. 277984 refuted. 0 times theorem prover too weak. 3740 trivial. 0 not checked. [2018-09-30 10:22:35,664 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:35,664 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 10:22:35,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 10:22:35,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 10:22:35,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 10:22:35,666 INFO L87 Difference]: Start difference. First operand 820 states and 888 transitions. Second operand 71 states. [2018-09-30 10:22:36,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:36,783 INFO L93 Difference]: Finished difference Result 845 states and 915 transitions. [2018-09-30 10:22:36,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 10:22:36,784 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 819 [2018-09-30 10:22:36,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:36,786 INFO L225 Difference]: With dead ends: 845 [2018-09-30 10:22:36,787 INFO L226 Difference]: Without dead ends: 843 [2018-09-30 10:22:36,787 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 [2018-09-30 10:22:36,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2018-09-30 10:22:37,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 832. [2018-09-30 10:22:37,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 832 states. [2018-09-30 10:22:37,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 901 transitions. [2018-09-30 10:22:37,451 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 901 transitions. Word has length 819 [2018-09-30 10:22:37,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:37,452 INFO L480 AbstractCegarLoop]: Abstraction has 832 states and 901 transitions. [2018-09-30 10:22:37,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 10:22:37,452 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 901 transitions. [2018-09-30 10:22:37,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 832 [2018-09-30 10:22:37,457 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:37,457 INFO L375 BasicCegarLoop]: trace histogram [690, 69, 69, 1, 1, 1] [2018-09-30 10:22:37,457 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:37,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:37,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1822005771, now seen corresponding path program 72 times [2018-09-30 10:22:37,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:37,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:37,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:37,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:37,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:37,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:40,090 INFO L134 CoverageAnalysis]: Checked inductivity of 290076 backedges. 0 proven. 286281 refuted. 0 times theorem prover too weak. 3795 trivial. 0 not checked. [2018-09-30 10:22:40,090 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:40,090 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 [2018-09-30 10:22:40,097 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:22:42,885 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 411 check-sat command(s) [2018-09-30 10:22:42,885 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:42,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:43,506 INFO L134 CoverageAnalysis]: Checked inductivity of 290076 backedges. 0 proven. 286281 refuted. 0 times theorem prover too weak. 3795 trivial. 0 not checked. [2018-09-30 10:22:43,529 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:43,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-30 10:22:43,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 10:22:43,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 10:22:43,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 10:22:43,531 INFO L87 Difference]: Start difference. First operand 832 states and 901 transitions. Second operand 72 states. [2018-09-30 10:22:44,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:44,718 INFO L93 Difference]: Finished difference Result 857 states and 928 transitions. [2018-09-30 10:22:44,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 10:22:44,719 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 831 [2018-09-30 10:22:44,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:44,721 INFO L225 Difference]: With dead ends: 857 [2018-09-30 10:22:44,721 INFO L226 Difference]: Without dead ends: 855 [2018-09-30 10:22:44,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 831 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 10:22:44,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2018-09-30 10:22:45,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 844. [2018-09-30 10:22:45,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2018-09-30 10:22:45,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 914 transitions. [2018-09-30 10:22:45,409 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 914 transitions. Word has length 831 [2018-09-30 10:22:45,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:45,409 INFO L480 AbstractCegarLoop]: Abstraction has 844 states and 914 transitions. [2018-09-30 10:22:45,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 10:22:45,409 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 914 transitions. [2018-09-30 10:22:45,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 844 [2018-09-30 10:22:45,414 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:45,415 INFO L375 BasicCegarLoop]: trace histogram [700, 70, 70, 1, 1, 1] [2018-09-30 10:22:45,415 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:45,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:45,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1902862911, now seen corresponding path program 73 times [2018-09-30 10:22:45,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:45,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:45,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:45,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:45,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:45,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:47,829 INFO L134 CoverageAnalysis]: Checked inductivity of 298550 backedges. 0 proven. 294700 refuted. 0 times theorem prover too weak. 3850 trivial. 0 not checked. [2018-09-30 10:22:47,829 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:47,829 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 [2018-09-30 10:22:47,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:22:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:48,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:48,806 INFO L134 CoverageAnalysis]: Checked inductivity of 298550 backedges. 0 proven. 294700 refuted. 0 times theorem prover too weak. 3850 trivial. 0 not checked. [2018-09-30 10:22:48,827 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:48,828 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-30 10:22:48,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 10:22:48,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 10:22:48,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 10:22:48,829 INFO L87 Difference]: Start difference. First operand 844 states and 914 transitions. Second operand 73 states. [2018-09-30 10:22:50,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:50,085 INFO L93 Difference]: Finished difference Result 869 states and 941 transitions. [2018-09-30 10:22:50,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 10:22:50,086 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 843 [2018-09-30 10:22:50,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:50,087 INFO L225 Difference]: With dead ends: 869 [2018-09-30 10:22:50,088 INFO L226 Difference]: Without dead ends: 867 [2018-09-30 10:22:50,088 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 [2018-09-30 10:22:50,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2018-09-30 10:22:50,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 856. [2018-09-30 10:22:50,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 856 states. [2018-09-30 10:22:50,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 927 transitions. [2018-09-30 10:22:50,774 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 927 transitions. Word has length 843 [2018-09-30 10:22:50,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:50,775 INFO L480 AbstractCegarLoop]: Abstraction has 856 states and 927 transitions. [2018-09-30 10:22:50,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 10:22:50,775 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 927 transitions. [2018-09-30 10:22:50,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 856 [2018-09-30 10:22:50,780 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:50,780 INFO L375 BasicCegarLoop]: trace histogram [710, 71, 71, 1, 1, 1] [2018-09-30 10:22:50,780 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:50,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:50,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1438007177, now seen corresponding path program 74 times [2018-09-30 10:22:50,781 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:50,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:50,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:50,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:22:50,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:50,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 307146 backedges. 0 proven. 303241 refuted. 0 times theorem prover too weak. 3905 trivial. 0 not checked. [2018-09-30 10:22:53,322 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:53,322 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:22:53,329 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:22:53,788 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:22:53,789 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:53,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:54,290 INFO L134 CoverageAnalysis]: Checked inductivity of 307146 backedges. 0 proven. 303241 refuted. 0 times theorem prover too weak. 3905 trivial. 0 not checked. [2018-09-30 10:22:54,312 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:54,312 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 10:22:54,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 10:22:54,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 10:22:54,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 10:22:54,314 INFO L87 Difference]: Start difference. First operand 856 states and 927 transitions. Second operand 74 states. [2018-09-30 10:22:55,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:55,549 INFO L93 Difference]: Finished difference Result 881 states and 954 transitions. [2018-09-30 10:22:55,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 10:22:55,549 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 855 [2018-09-30 10:22:55,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:55,550 INFO L225 Difference]: With dead ends: 881 [2018-09-30 10:22:55,550 INFO L226 Difference]: Without dead ends: 879 [2018-09-30 10:22:55,551 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 [2018-09-30 10:22:55,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2018-09-30 10:22:56,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 868. [2018-09-30 10:22:56,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 868 states. [2018-09-30 10:22:56,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 940 transitions. [2018-09-30 10:22:56,333 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 940 transitions. Word has length 855 [2018-09-30 10:22:56,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:56,334 INFO L480 AbstractCegarLoop]: Abstraction has 868 states and 940 transitions. [2018-09-30 10:22:56,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 10:22:56,334 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 940 transitions. [2018-09-30 10:22:56,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 868 [2018-09-30 10:22:56,339 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:56,339 INFO L375 BasicCegarLoop]: trace histogram [720, 72, 72, 1, 1, 1] [2018-09-30 10:22:56,339 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:56,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:56,340 INFO L82 PathProgramCache]: Analyzing trace with hash 696090067, now seen corresponding path program 75 times [2018-09-30 10:22:56,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:56,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:56,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:56,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:56,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:56,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:58,846 INFO L134 CoverageAnalysis]: Checked inductivity of 315864 backedges. 0 proven. 311904 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2018-09-30 10:22:58,846 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:58,846 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 [2018-09-30 10:22:58,853 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:23:01,757 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 433 check-sat command(s) [2018-09-30 10:23:01,758 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:01,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 315864 backedges. 0 proven. 311904 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2018-09-30 10:23:02,331 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:02,331 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-30 10:23:02,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 10:23:02,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 10:23:02,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 10:23:02,333 INFO L87 Difference]: Start difference. First operand 868 states and 940 transitions. Second operand 75 states. [2018-09-30 10:23:03,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:03,628 INFO L93 Difference]: Finished difference Result 893 states and 967 transitions. [2018-09-30 10:23:03,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 10:23:03,629 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 867 [2018-09-30 10:23:03,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:03,630 INFO L225 Difference]: With dead ends: 893 [2018-09-30 10:23:03,630 INFO L226 Difference]: Without dead ends: 891 [2018-09-30 10:23:03,631 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 [2018-09-30 10:23:03,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2018-09-30 10:23:04,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 880. [2018-09-30 10:23:04,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2018-09-30 10:23:04,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 953 transitions. [2018-09-30 10:23:04,387 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 953 transitions. Word has length 867 [2018-09-30 10:23:04,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:04,387 INFO L480 AbstractCegarLoop]: Abstraction has 880 states and 953 transitions. [2018-09-30 10:23:04,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 10:23:04,387 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 953 transitions. [2018-09-30 10:23:04,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 880 [2018-09-30 10:23:04,393 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:04,393 INFO L375 BasicCegarLoop]: trace histogram [730, 73, 73, 1, 1, 1] [2018-09-30 10:23:04,393 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:04,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:04,394 INFO L82 PathProgramCache]: Analyzing trace with hash 943168797, now seen corresponding path program 76 times [2018-09-30 10:23:04,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:04,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:04,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:04,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:04,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:04,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 324704 backedges. 0 proven. 320689 refuted. 0 times theorem prover too weak. 4015 trivial. 0 not checked. [2018-09-30 10:23:07,189 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:07,189 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 [2018-09-30 10:23:07,196 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:23:07,679 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:23:07,679 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:07,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:08,227 INFO L134 CoverageAnalysis]: Checked inductivity of 324704 backedges. 0 proven. 320689 refuted. 0 times theorem prover too weak. 4015 trivial. 0 not checked. [2018-09-30 10:23:08,249 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:08,249 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 10:23:08,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 10:23:08,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 10:23:08,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 10:23:08,251 INFO L87 Difference]: Start difference. First operand 880 states and 953 transitions. Second operand 76 states. [2018-09-30 10:23:09,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:09,510 INFO L93 Difference]: Finished difference Result 905 states and 980 transitions. [2018-09-30 10:23:09,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 10:23:09,510 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 879 [2018-09-30 10:23:09,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:09,512 INFO L225 Difference]: With dead ends: 905 [2018-09-30 10:23:09,512 INFO L226 Difference]: Without dead ends: 903 [2018-09-30 10:23:09,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 953 GetRequests, 879 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 10:23:09,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2018-09-30 10:23:10,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 892. [2018-09-30 10:23:10,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 892 states. [2018-09-30 10:23:10,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 966 transitions. [2018-09-30 10:23:10,316 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 966 transitions. Word has length 879 [2018-09-30 10:23:10,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:10,317 INFO L480 AbstractCegarLoop]: Abstraction has 892 states and 966 transitions. [2018-09-30 10:23:10,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 10:23:10,317 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 966 transitions. [2018-09-30 10:23:10,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 892 [2018-09-30 10:23:10,321 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:10,322 INFO L375 BasicCegarLoop]: trace histogram [740, 74, 74, 1, 1, 1] [2018-09-30 10:23:10,322 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:10,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:10,322 INFO L82 PathProgramCache]: Analyzing trace with hash -811917977, now seen corresponding path program 77 times [2018-09-30 10:23:10,322 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:10,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:10,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:10,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:10,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:13,025 INFO L134 CoverageAnalysis]: Checked inductivity of 333666 backedges. 0 proven. 329596 refuted. 0 times theorem prover too weak. 4070 trivial. 0 not checked. [2018-09-30 10:23:13,025 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:13,025 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 [2018-09-30 10:23:13,032 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:23:16,276 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 445 check-sat command(s) [2018-09-30 10:23:16,276 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:16,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:16,887 INFO L134 CoverageAnalysis]: Checked inductivity of 333666 backedges. 0 proven. 329596 refuted. 0 times theorem prover too weak. 4070 trivial. 0 not checked. [2018-09-30 10:23:16,909 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:16,910 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-30 10:23:16,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 10:23:16,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 10:23:16,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 10:23:16,911 INFO L87 Difference]: Start difference. First operand 892 states and 966 transitions. Second operand 77 states. [2018-09-30 10:23:18,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:18,287 INFO L93 Difference]: Finished difference Result 917 states and 993 transitions. [2018-09-30 10:23:18,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 10:23:18,287 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 891 [2018-09-30 10:23:18,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:18,289 INFO L225 Difference]: With dead ends: 917 [2018-09-30 10:23:18,289 INFO L226 Difference]: Without dead ends: 915 [2018-09-30 10:23:18,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 891 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 10:23:18,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2018-09-30 10:23:19,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 904. [2018-09-30 10:23:19,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 904 states. [2018-09-30 10:23:19,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 979 transitions. [2018-09-30 10:23:19,096 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 979 transitions. Word has length 891 [2018-09-30 10:23:19,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:19,096 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 979 transitions. [2018-09-30 10:23:19,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 10:23:19,096 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 979 transitions. [2018-09-30 10:23:19,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 904 [2018-09-30 10:23:19,102 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:19,102 INFO L375 BasicCegarLoop]: trace histogram [750, 75, 75, 1, 1, 1] [2018-09-30 10:23:19,103 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:19,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:19,103 INFO L82 PathProgramCache]: Analyzing trace with hash -543261007, now seen corresponding path program 78 times [2018-09-30 10:23:19,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:19,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:19,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:19,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:19,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:19,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:22,168 INFO L134 CoverageAnalysis]: Checked inductivity of 342750 backedges. 0 proven. 338625 refuted. 0 times theorem prover too weak. 4125 trivial. 0 not checked. [2018-09-30 10:23:22,168 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:22,169 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 [2018-09-30 10:23:22,177 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:23:25,446 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 446 check-sat command(s) [2018-09-30 10:23:25,446 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:25,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 342750 backedges. 0 proven. 338625 refuted. 0 times theorem prover too weak. 4125 trivial. 0 not checked. [2018-09-30 10:23:26,031 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:26,031 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-30 10:23:26,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 10:23:26,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 10:23:26,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 10:23:26,032 INFO L87 Difference]: Start difference. First operand 904 states and 979 transitions. Second operand 78 states. [2018-09-30 10:23:27,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:27,369 INFO L93 Difference]: Finished difference Result 929 states and 1006 transitions. [2018-09-30 10:23:27,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 10:23:27,370 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 903 [2018-09-30 10:23:27,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:27,371 INFO L225 Difference]: With dead ends: 929 [2018-09-30 10:23:27,371 INFO L226 Difference]: Without dead ends: 927 [2018-09-30 10:23:27,372 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 [2018-09-30 10:23:27,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2018-09-30 10:23:28,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 916. [2018-09-30 10:23:28,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 916 states. [2018-09-30 10:23:28,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 992 transitions. [2018-09-30 10:23:28,191 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 992 transitions. Word has length 903 [2018-09-30 10:23:28,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:28,191 INFO L480 AbstractCegarLoop]: Abstraction has 916 states and 992 transitions. [2018-09-30 10:23:28,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 10:23:28,191 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 992 transitions. [2018-09-30 10:23:28,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2018-09-30 10:23:28,196 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:28,197 INFO L375 BasicCegarLoop]: trace histogram [760, 76, 76, 1, 1, 1] [2018-09-30 10:23:28,197 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:28,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:28,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1703395077, now seen corresponding path program 79 times [2018-09-30 10:23:28,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:28,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:28,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:28,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:28,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:31,365 INFO L134 CoverageAnalysis]: Checked inductivity of 351956 backedges. 0 proven. 347776 refuted. 0 times theorem prover too weak. 4180 trivial. 0 not checked. [2018-09-30 10:23:31,366 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:31,366 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:23:31,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:23:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:31,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:32,504 INFO L134 CoverageAnalysis]: Checked inductivity of 351956 backedges. 0 proven. 347776 refuted. 0 times theorem prover too weak. 4180 trivial. 0 not checked. [2018-09-30 10:23:32,526 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:32,526 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-30 10:23:32,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 10:23:32,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 10:23:32,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 10:23:32,527 INFO L87 Difference]: Start difference. First operand 916 states and 992 transitions. Second operand 79 states. Received shutdown request... [2018-09-30 10:23:32,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 10:23:32,749 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 10:23:32,755 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 10:23:32,755 INFO L202 PluginConnector]: Adding new model nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 10:23:32 BoogieIcfgContainer [2018-09-30 10:23:32,755 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 10:23:32,756 INFO L168 Benchmark]: Toolchain (without parser) took 246774.08 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: -610.4 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-09-30 10:23:32,758 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:23:32,758 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.57 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:23:32,758 INFO L168 Benchmark]: Boogie Preprocessor took 23.95 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:23:32,759 INFO L168 Benchmark]: RCFGBuilder took 351.51 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 10:23:32,759 INFO L168 Benchmark]: TraceAbstraction took 246346.19 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -631.5 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-09-30 10:23:32,762 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 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.57 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.95 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 351.51 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 246346.19 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -631.5 MB). Peak memory consumption was 1.4 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 constructing difference of abstraction (916states) and FLOYD_HOARE automaton (currently 32 states, 79 states before enhancement), while ReachableStatesComputation was computing reachable states (349 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 246.2s OverallTime, 81 OverallIterations, 760 TraceHistogramMax, 51.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 320 SDtfs, 5904 SDslu, 4291 SDs, 0 SdLazy, 7479 SolverSat, 461 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38567 GetRequests, 35300 SyntacticMatches, 0 SemanticMatches, 3267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5190 ImplicationChecksByTransitivity, 81.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=916occurred in iteration=80, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 20.7s AutomataMinimizationTime, 80 MinimizatonAttempts, 807 StatesRemovedByMinimization, 76 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 4.3s SsaConstructionTime, 52.6s SatisfiabilityAnalysisTime, 99.0s 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-0-2018-09-30_10-23-32-776.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-0-2018-09-30_10-23-32-776.csv Completed graceful shutdown