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_PUPT.epf -i ../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:41:43,870 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:41:43,872 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:41:43,888 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:41:43,889 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:41:43,890 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:41:43,891 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:41:43,896 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:41:43,897 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:41:43,898 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:41:43,899 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-26 21:41:43,934 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-26 21:41:43,962 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:41:43,962 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:41:43,963 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:41:43,963 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:41:43,964 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:41:43,964 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:41:43,964 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:41:43,965 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:41:43,965 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:41:43,965 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:41:43,965 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:41:43,965 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:41:43,966 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:41:43,966 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:41:43,966 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:41:43,966 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:41:43,966 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:41:43,967 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:41:43,967 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:41:43,967 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:41:43,967 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:41:43,967 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:41:43,968 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:41:43,968 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:41:43,968 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:41:43,968 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:41:43,970 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:41:43,970 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:41:43,971 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:41:43,971 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:41:43,971 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-26 21:41:44,025 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:41:44,039 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:41:44,043 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:41:44,045 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:41:44,046 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:41:44,046 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-09-26 21:41:44,047 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl' [2018-09-26 21:41:44,096 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:41:44,099 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:41:44,100 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:41:44,100 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:41:44,100 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:41:44,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:41:44" (1/1) ... [2018-09-26 21:41:44,132 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:41:44" (1/1) ... [2018-09-26 21:41:44,139 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:41:44,140 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:41:44,140 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:41:44,140 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:41:44,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:41:44" (1/1) ... [2018-09-26 21:41:44,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:41:44" (1/1) ... [2018-09-26 21:41:44,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:41:44" (1/1) ... [2018-09-26 21:41:44,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:41:44" (1/1) ... [2018-09-26 21:41:44,158 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:41:44" (1/1) ... [2018-09-26 21:41:44,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:41:44" (1/1) ... [2018-09-26 21:41:44,161 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:41:44" (1/1) ... [2018-09-26 21:41:44,162 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:41:44,163 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:41:44,163 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:41:44,163 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:41:44,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:41:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:41:44,245 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-26 21:41:44,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-26 21:41:44,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-26 21:41:44,465 INFO L346 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-26 21:41:44,466 INFO L202 PluginConnector]: Adding new model count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:41:44 BoogieIcfgContainer [2018-09-26 21:41:44,466 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:41:44,467 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:41:44,467 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:41:44,470 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:41:44,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:41:44" (1/2) ... [2018-09-26 21:41:44,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b86a302 and model type count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:41:44, skipping insertion in model container [2018-09-26 21:41:44,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:41:44" (2/2) ... [2018-09-26 21:41:44,474 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-09-26 21:41:44,485 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:41:44,493 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:41:44,543 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:41:44,544 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:41:44,545 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:41:44,545 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:41:44,545 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:41:44,545 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:41:44,545 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:41:44,546 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:41:44,546 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:41:44,563 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-26 21:41:44,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-26 21:41:44,576 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:44,577 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-26 21:41:44,584 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:44,592 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:44,593 INFO L82 PathProgramCache]: Analyzing trace with hash 30017, now seen corresponding path program 1 times [2018-09-26 21:41:44,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:44,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:44,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:44,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:41:44,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:44,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:44,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:44,742 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:41:44,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-26 21:41:44,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:41:44,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:41:44,761 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:44,763 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-26 21:41:44,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:44,968 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-09-26 21:41:44,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:41:44,970 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-26 21:41:44,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:44,992 INFO L225 Difference]: With dead ends: 9 [2018-09-26 21:41:44,992 INFO L226 Difference]: Without dead ends: 5 [2018-09-26 21:41:45,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:45,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-26 21:41:45,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-26 21:41:45,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-26 21:41:45,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-26 21:41:45,043 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-26 21:41:45,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:45,043 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-26 21:41:45,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:41:45,043 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-26 21:41:45,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-26 21:41:45,044 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:45,044 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-26 21:41:45,044 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:45,044 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:45,044 INFO L82 PathProgramCache]: Analyzing trace with hash 928552, now seen corresponding path program 1 times [2018-09-26 21:41:45,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:45,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:45,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:45,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:41:45,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:45,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:45,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:45,108 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:41:45,108 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:41:45,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:41:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:45,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:41:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:45,295 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:41:45,296 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-26 21:41:45,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:41:45,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:41:45,297 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:45,297 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-09-26 21:41:45,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:45,524 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-26 21:41:45,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:41:45,525 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-26 21:41:45,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:45,525 INFO L225 Difference]: With dead ends: 8 [2018-09-26 21:41:45,526 INFO L226 Difference]: Without dead ends: 6 [2018-09-26 21:41:45,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:45,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-26 21:41:45,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-26 21:41:45,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-26 21:41:45,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-26 21:41:45,529 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-26 21:41:45,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:45,530 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-26 21:41:45,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:41:45,530 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-26 21:41:45,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-26 21:41:45,530 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:45,531 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-26 21:41:45,531 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:45,531 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:45,531 INFO L82 PathProgramCache]: Analyzing trace with hash 28783137, now seen corresponding path program 2 times [2018-09-26 21:41:45,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:45,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:45,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:45,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:41:45,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:45,613 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:41:45,614 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:41:45,625 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:41:45,655 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:41:45,655 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:41:45,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:41:45,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:45,715 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:41:45,715 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-26 21:41:45,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:41:45,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:41:45,716 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:45,716 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-26 21:41:45,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:45,800 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-26 21:41:45,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:41:45,801 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-26 21:41:45,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:45,802 INFO L225 Difference]: With dead ends: 9 [2018-09-26 21:41:45,802 INFO L226 Difference]: Without dead ends: 7 [2018-09-26 21:41:45,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:45,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-26 21:41:45,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-26 21:41:45,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-26 21:41:45,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-26 21:41:45,806 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-26 21:41:45,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:45,807 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-26 21:41:45,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:41:45,807 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-26 21:41:45,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 21:41:45,807 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:45,808 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-26 21:41:45,808 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:45,808 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:45,808 INFO L82 PathProgramCache]: Analyzing trace with hash 892275272, now seen corresponding path program 3 times [2018-09-26 21:41:45,809 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:45,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:45,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:45,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:41:45,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:46,071 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:41:46,072 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:41:46,087 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:41:46,139 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-26 21:41:46,140 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:41:46,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:41:46,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:46,217 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:41:46,217 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:41:46,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:41:46,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:41:46,218 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:46,218 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-26 21:41:46,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:46,361 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-26 21:41:46,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:41:46,362 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-26 21:41:46,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:46,363 INFO L225 Difference]: With dead ends: 10 [2018-09-26 21:41:46,364 INFO L226 Difference]: Without dead ends: 8 [2018-09-26 21:41:46,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:46,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-26 21:41:46,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-26 21:41:46,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-26 21:41:46,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-26 21:41:46,367 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-26 21:41:46,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:46,368 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-26 21:41:46,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:41:46,368 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-26 21:41:46,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-26 21:41:46,369 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:46,369 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-26 21:41:46,369 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:46,369 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:46,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1890727681, now seen corresponding path program 4 times [2018-09-26 21:41:46,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:46,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:46,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:46,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:41:46,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:46,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:46,652 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:46,652 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:41:46,652 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:41:46,660 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:41:46,676 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:41:46,677 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:41:46,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:41:46,718 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:46,740 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:41:46,740 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:41:46,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:41:46,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:41:46,741 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:46,741 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-26 21:41:46,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:46,819 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-26 21:41:46,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:41:46,821 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-26 21:41:46,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:46,822 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:41:46,822 INFO L226 Difference]: Without dead ends: 9 [2018-09-26 21:41:46,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:46,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-26 21:41:46,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-26 21:41:46,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-26 21:41:46,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-26 21:41:46,825 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-26 21:41:46,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:46,826 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-26 21:41:46,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:41:46,826 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-26 21:41:46,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:41:46,826 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:46,826 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-26 21:41:46,827 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:46,827 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:46,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1516986008, now seen corresponding path program 5 times [2018-09-26 21:41:46,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:46,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:46,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:46,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:41:46,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:46,923 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:46,924 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:41:46,924 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:41:46,935 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:41:46,952 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-26 21:41:46,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:41:46,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:41:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:47,001 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:41:47,001 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:41:47,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:41:47,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:41:47,002 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:47,002 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-26 21:41:47,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:47,501 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-26 21:41:47,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:41:47,502 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-26 21:41:47,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:47,503 INFO L225 Difference]: With dead ends: 12 [2018-09-26 21:41:47,503 INFO L226 Difference]: Without dead ends: 10 [2018-09-26 21:41:47,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:47,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-26 21:41:47,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-26 21:41:47,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-26 21:41:47,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-26 21:41:47,507 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-26 21:41:47,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:47,507 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-26 21:41:47,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:41:47,507 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-26 21:41:47,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:41:47,508 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:47,508 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-26 21:41:47,508 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:47,509 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:47,509 INFO L82 PathProgramCache]: Analyzing trace with hash 218072033, now seen corresponding path program 6 times [2018-09-26 21:41:47,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:47,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:47,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:47,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:41:47,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:47,681 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:47,682 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:41:47,682 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:41:47,695 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:41:47,717 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-26 21:41:47,718 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:41:47,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:41:47,764 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:47,787 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:41:47,787 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:41:47,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:41:47,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:41:47,788 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:47,788 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-26 21:41:47,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:47,905 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-26 21:41:47,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:41:47,906 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-26 21:41:47,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:47,907 INFO L225 Difference]: With dead ends: 13 [2018-09-26 21:41:47,907 INFO L226 Difference]: Without dead ends: 11 [2018-09-26 21:41:47,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:47,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-26 21:41:47,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-26 21:41:47,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-26 21:41:47,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-26 21:41:47,911 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-26 21:41:47,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:47,911 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-26 21:41:47,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:41:47,911 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-26 21:41:47,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:41:47,912 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:47,912 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-26 21:41:47,912 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:47,913 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:47,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1829703544, now seen corresponding path program 7 times [2018-09-26 21:41:47,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:47,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:47,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:47,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:41:47,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:48,136 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:48,137 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:41:48,137 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:41:48,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:41:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:48,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:41:48,219 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:48,239 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:41:48,240 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:41:48,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:41:48,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:41:48,241 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:48,241 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-26 21:41:48,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:48,323 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-26 21:41:48,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:41:48,323 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-26 21:41:48,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:48,324 INFO L225 Difference]: With dead ends: 14 [2018-09-26 21:41:48,324 INFO L226 Difference]: Without dead ends: 12 [2018-09-26 21:41:48,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:48,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-26 21:41:48,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-26 21:41:48,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-26 21:41:48,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-26 21:41:48,329 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-26 21:41:48,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:48,329 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-26 21:41:48,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:41:48,329 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-26 21:41:48,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:41:48,330 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:48,330 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-26 21:41:48,330 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:48,330 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:48,331 INFO L82 PathProgramCache]: Analyzing trace with hash -886236991, now seen corresponding path program 8 times [2018-09-26 21:41:48,331 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:48,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:48,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:48,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:41:48,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:48,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:48,465 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:41:48,465 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:41:48,480 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:41:48,499 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:41:48,499 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:41:48,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:41:48,605 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:48,641 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:41:48,642 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:41:48,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:41:48,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:41:48,643 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:48,643 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-09-26 21:41:49,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:49,289 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-26 21:41:49,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:41:49,295 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-09-26 21:41:49,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:49,295 INFO L225 Difference]: With dead ends: 15 [2018-09-26 21:41:49,295 INFO L226 Difference]: Without dead ends: 13 [2018-09-26 21:41:49,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:49,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-26 21:41:49,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-26 21:41:49,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-26 21:41:49,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-26 21:41:49,298 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-26 21:41:49,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:49,299 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-26 21:41:49,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:41:49,299 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-26 21:41:49,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-26 21:41:49,299 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:49,299 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-26 21:41:49,300 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:49,300 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:49,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1703544920, now seen corresponding path program 9 times [2018-09-26 21:41:49,300 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:49,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:49,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:49,301 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:41:49,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:49,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:49,469 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:49,469 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:41:49,469 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:41:49,479 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:41:49,536 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-26 21:41:49,537 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:41:49,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:41:49,581 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:49,602 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:41:49,603 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-26 21:41:49,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:41:49,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:41:49,603 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:49,604 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-09-26 21:41:49,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:49,715 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-26 21:41:49,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:41:49,716 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-26 21:41:49,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:49,717 INFO L225 Difference]: With dead ends: 16 [2018-09-26 21:41:49,717 INFO L226 Difference]: Without dead ends: 14 [2018-09-26 21:41:49,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:49,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-26 21:41:49,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-26 21:41:49,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-26 21:41:49,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-26 21:41:49,722 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-26 21:41:49,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:49,722 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-26 21:41:49,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:41:49,722 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-26 21:41:49,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:41:49,723 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:49,723 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-26 21:41:49,723 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:49,723 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:49,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1270286943, now seen corresponding path program 10 times [2018-09-26 21:41:49,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:49,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:49,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:49,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:41:49,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:49,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:49,916 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:49,916 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:41:49,916 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:41:49,925 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:41:49,957 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:41:49,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:41:49,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:41:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:50,063 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:41:50,064 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-26 21:41:50,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:41:50,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:41:50,066 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:50,066 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-09-26 21:41:50,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:50,170 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-26 21:41:50,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:41:50,171 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-26 21:41:50,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:50,172 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:41:50,172 INFO L226 Difference]: Without dead ends: 15 [2018-09-26 21:41:50,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:50,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-26 21:41:50,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-26 21:41:50,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-26 21:41:50,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-26 21:41:50,176 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-26 21:41:50,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:50,177 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-26 21:41:50,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:41:50,177 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-26 21:41:50,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:41:50,178 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:50,178 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-26 21:41:50,178 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:50,178 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:50,178 INFO L82 PathProgramCache]: Analyzing trace with hash -724191544, now seen corresponding path program 11 times [2018-09-26 21:41:50,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:50,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:50,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:50,180 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:41:50,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:50,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:50,339 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:41:50,339 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:41:50,347 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:41:50,457 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:41:50,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:41:50,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:41:50,647 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:50,668 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:41:50,668 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-26 21:41:50,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:41:50,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:41:50,669 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:50,669 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-09-26 21:41:50,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:50,790 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-26 21:41:50,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:41:50,791 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-26 21:41:50,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:50,792 INFO L225 Difference]: With dead ends: 18 [2018-09-26 21:41:50,792 INFO L226 Difference]: Without dead ends: 16 [2018-09-26 21:41:50,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:50,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-26 21:41:50,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-26 21:41:50,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:41:50,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-26 21:41:50,795 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-26 21:41:50,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:50,795 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-26 21:41:50,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:41:50,796 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-26 21:41:50,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:41:50,796 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:50,797 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-26 21:41:50,797 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:50,797 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:50,797 INFO L82 PathProgramCache]: Analyzing trace with hash -975103359, now seen corresponding path program 12 times [2018-09-26 21:41:50,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:50,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:50,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:50,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:41:50,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:50,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:50,942 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:41:50,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:41:50,950 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:41:50,975 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:41:50,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:41:50,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:41:51,033 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:51,061 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:41:51,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-26 21:41:51,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:41:51,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:41:51,062 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:51,062 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-09-26 21:41:51,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:51,172 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-26 21:41:51,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:41:51,172 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-26 21:41:51,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:51,173 INFO L225 Difference]: With dead ends: 19 [2018-09-26 21:41:51,173 INFO L226 Difference]: Without dead ends: 17 [2018-09-26 21:41:51,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:51,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-26 21:41:51,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-26 21:41:51,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-26 21:41:51,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-26 21:41:51,178 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-26 21:41:51,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:51,178 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-26 21:41:51,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:41:51,178 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-26 21:41:51,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-26 21:41:51,179 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:51,179 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-26 21:41:51,179 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:51,179 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:51,179 INFO L82 PathProgramCache]: Analyzing trace with hash -163435032, now seen corresponding path program 13 times [2018-09-26 21:41:51,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:51,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:51,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:51,180 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:41:51,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:51,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:51,435 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:41:51,435 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:41:51,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:41:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:51,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:41:51,596 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:51,628 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:41:51,628 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-26 21:41:51,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:41:51,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:41:51,629 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:51,629 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-09-26 21:41:53,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:53,228 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-26 21:41:53,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:41:53,228 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-09-26 21:41:53,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:53,229 INFO L225 Difference]: With dead ends: 20 [2018-09-26 21:41:53,229 INFO L226 Difference]: Without dead ends: 18 [2018-09-26 21:41:53,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:53,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-26 21:41:53,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-26 21:41:53,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:41:53,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-26 21:41:53,233 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-26 21:41:53,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:53,234 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-26 21:41:53,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:41:53,234 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-26 21:41:53,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:41:53,234 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:53,234 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-26 21:41:53,235 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:53,235 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:53,235 INFO L82 PathProgramCache]: Analyzing trace with hash -771520671, now seen corresponding path program 14 times [2018-09-26 21:41:53,235 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:53,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:53,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:53,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:41:53,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:53,534 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:53,534 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:41:53,535 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:41:53,544 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:41:53,583 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:41:53,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:41:53,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:41:53,720 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:53,740 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:41:53,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-26 21:41:53,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:41:53,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:41:53,742 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:53,742 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-09-26 21:41:53,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:53,876 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-26 21:41:53,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:41:53,877 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-09-26 21:41:53,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:53,878 INFO L225 Difference]: With dead ends: 21 [2018-09-26 21:41:53,878 INFO L226 Difference]: Without dead ends: 19 [2018-09-26 21:41:53,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:53,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-26 21:41:53,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-26 21:41:53,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-26 21:41:53,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-26 21:41:53,884 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-26 21:41:53,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:53,884 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-26 21:41:53,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:41:53,885 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-26 21:41:53,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:41:53,885 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:53,886 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-26 21:41:53,886 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:53,886 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:53,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1852661000, now seen corresponding path program 15 times [2018-09-26 21:41:53,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:53,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:53,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:53,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:41:53,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:53,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:54,289 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:54,290 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:41:54,290 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:41:54,301 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:41:54,361 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:41:54,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:41:54,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:41:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:54,507 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:41:54,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-26 21:41:54,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:41:54,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:41:54,508 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:54,509 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-09-26 21:41:54,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:54,698 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-26 21:41:54,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:41:54,699 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-26 21:41:54,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:54,700 INFO L225 Difference]: With dead ends: 22 [2018-09-26 21:41:54,700 INFO L226 Difference]: Without dead ends: 20 [2018-09-26 21:41:54,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:54,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-26 21:41:54,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-26 21:41:54,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:41:54,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-26 21:41:54,704 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-26 21:41:54,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:54,704 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-26 21:41:54,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:41:54,705 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-26 21:41:54,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:41:54,705 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:54,705 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-09-26 21:41:54,706 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:54,706 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:54,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1597914177, now seen corresponding path program 16 times [2018-09-26 21:41:54,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:54,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:54,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:54,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:41:54,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:54,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:54,904 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:41:54,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:41:54,913 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:41:54,938 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:41:54,938 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:41:54,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:41:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:55,022 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:41:55,023 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-26 21:41:55,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-26 21:41:55,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-26 21:41:55,023 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:55,024 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-09-26 21:41:55,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:55,240 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-26 21:41:55,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:41:55,241 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-26 21:41:55,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:55,242 INFO L225 Difference]: With dead ends: 23 [2018-09-26 21:41:55,242 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 21:41:55,242 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:55,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 21:41:55,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-26 21:41:55,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-26 21:41:55,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-26 21:41:55,245 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-26 21:41:55,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:55,245 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-26 21:41:55,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-26 21:41:55,245 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-26 21:41:55,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-26 21:41:55,246 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:55,246 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-26 21:41:55,246 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:55,246 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:55,247 INFO L82 PathProgramCache]: Analyzing trace with hash -2004270040, now seen corresponding path program 17 times [2018-09-26 21:41:55,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:55,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:55,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:55,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:41:55,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:55,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:55,443 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:41:55,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:41:55,451 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:41:55,533 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-26 21:41:55,534 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:41:55,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:41:55,597 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:55,617 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:41:55,618 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-26 21:41:55,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:41:55,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:41:55,618 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:55,619 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-09-26 21:41:55,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:55,800 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-26 21:41:55,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:41:55,801 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-09-26 21:41:55,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:55,802 INFO L225 Difference]: With dead ends: 24 [2018-09-26 21:41:55,802 INFO L226 Difference]: Without dead ends: 22 [2018-09-26 21:41:55,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:55,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-26 21:41:55,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-26 21:41:55,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:41:55,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-26 21:41:55,806 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-26 21:41:55,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:55,806 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-26 21:41:55,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:41:55,807 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-26 21:41:55,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-26 21:41:55,807 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:55,807 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-26 21:41:55,808 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:55,808 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:55,808 INFO L82 PathProgramCache]: Analyzing trace with hash -2002831071, now seen corresponding path program 18 times [2018-09-26 21:41:55,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:55,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:55,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:55,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:41:55,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:55,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:56,041 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:41:56,041 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:41:56,057 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:41:56,096 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-26 21:41:56,097 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:41:56,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:41:56,168 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:56,199 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:41:56,199 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-26 21:41:56,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-26 21:41:56,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-26 21:41:56,200 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:56,200 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-09-26 21:41:56,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:56,355 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-26 21:41:56,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:41:56,356 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-26 21:41:56,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:56,357 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:41:56,357 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:41:56,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:56,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:41:56,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-26 21:41:56,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-26 21:41:56,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-26 21:41:56,361 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-26 21:41:56,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:56,361 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-26 21:41:56,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-26 21:41:56,361 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-26 21:41:56,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 21:41:56,362 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:56,362 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-26 21:41:56,362 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:56,363 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:56,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1958223032, now seen corresponding path program 19 times [2018-09-26 21:41:56,363 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:56,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:56,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:56,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:41:56,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:56,508 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:56,508 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:41:56,508 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:41:56,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:41:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:56,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:41:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:56,763 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:41:56,763 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-26 21:41:56,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:41:56,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:41:56,764 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:56,764 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-09-26 21:41:56,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:56,986 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-26 21:41:56,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:41:56,987 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-26 21:41:56,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:56,987 INFO L225 Difference]: With dead ends: 26 [2018-09-26 21:41:56,988 INFO L226 Difference]: Without dead ends: 24 [2018-09-26 21:41:56,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:56,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-26 21:41:56,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-26 21:41:56,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:41:56,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-26 21:41:56,991 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-26 21:41:56,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:56,991 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-26 21:41:56,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:41:56,991 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-26 21:41:56,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-26 21:41:56,992 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:56,992 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-26 21:41:56,992 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:56,992 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:56,992 INFO L82 PathProgramCache]: Analyzing trace with hash -575373823, now seen corresponding path program 20 times [2018-09-26 21:41:56,992 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:56,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:56,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:56,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:41:56,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:57,432 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:57,432 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:41:57,433 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:41:57,440 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:41:57,475 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:41:57,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:41:57,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:41:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:57,558 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:41:57,559 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-26 21:41:57,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:41:57,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:41:57,560 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:57,560 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-09-26 21:41:57,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:57,733 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-26 21:41:57,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:41:57,733 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-09-26 21:41:57,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:57,734 INFO L225 Difference]: With dead ends: 27 [2018-09-26 21:41:57,734 INFO L226 Difference]: Without dead ends: 25 [2018-09-26 21:41:57,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:57,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-26 21:41:57,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-26 21:41:57,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-26 21:41:57,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-26 21:41:57,739 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-26 21:41:57,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:57,739 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-26 21:41:57,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:41:57,739 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-26 21:41:57,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-26 21:41:57,740 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:57,740 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-26 21:41:57,741 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:57,741 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:57,741 INFO L82 PathProgramCache]: Analyzing trace with hash -656721304, now seen corresponding path program 21 times [2018-09-26 21:41:57,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:57,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:57,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:57,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:41:57,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:41:58,139 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:58,139 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:41:58,139 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:41:58,156 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:41:58,337 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-26 21:41:58,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:41:58,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:41:58,944 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:41:58,965 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:41:58,965 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-26 21:41:58,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:41:58,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:41:58,966 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:41:58,966 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-09-26 21:41:59,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:41:59,137 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-26 21:41:59,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:41:59,139 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-09-26 21:41:59,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:41:59,140 INFO L225 Difference]: With dead ends: 28 [2018-09-26 21:41:59,140 INFO L226 Difference]: Without dead ends: 26 [2018-09-26 21:41:59,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:41:59,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-26 21:41:59,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-26 21:41:59,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:41:59,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-26 21:41:59,147 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-26 21:41:59,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:41:59,147 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-26 21:41:59,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:41:59,147 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-26 21:41:59,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-26 21:41:59,148 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:41:59,148 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-26 21:41:59,148 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:41:59,148 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:41:59,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1116474081, now seen corresponding path program 22 times [2018-09-26 21:41:59,148 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:41:59,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:41:59,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:59,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:41:59,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:41:59,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:00,156 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:00,157 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:00,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:00,165 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:42:00,211 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:42:00,211 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:00,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:00,493 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:00,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:00,514 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-26 21:42:00,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-26 21:42:00,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-26 21:42:00,515 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:00,515 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-09-26 21:42:00,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:00,818 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-26 21:42:00,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:42:00,819 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-09-26 21:42:00,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:00,819 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:42:00,819 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:42:00,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:00,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:42:00,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-26 21:42:00,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-26 21:42:00,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-26 21:42:00,822 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-26 21:42:00,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:00,822 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-26 21:42:00,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-26 21:42:00,822 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-26 21:42:00,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-26 21:42:00,823 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:00,823 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-26 21:42:00,823 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:00,823 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:00,823 INFO L82 PathProgramCache]: Analyzing trace with hash 250956168, now seen corresponding path program 23 times [2018-09-26 21:42:00,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:00,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:00,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:00,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:00,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:00,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:01,526 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:01,527 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:01,527 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:01,535 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:42:01,650 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-26 21:42:01,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:01,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:01,703 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:01,723 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:01,724 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-26 21:42:01,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:42:01,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:42:01,724 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:01,724 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-09-26 21:42:02,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:02,043 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-26 21:42:02,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:42:02,045 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-26 21:42:02,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:02,046 INFO L225 Difference]: With dead ends: 30 [2018-09-26 21:42:02,046 INFO L226 Difference]: Without dead ends: 28 [2018-09-26 21:42:02,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:02,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-26 21:42:02,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-26 21:42:02,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:42:02,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-26 21:42:02,052 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-26 21:42:02,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:02,052 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-26 21:42:02,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:42:02,053 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-26 21:42:02,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-26 21:42:02,053 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:02,053 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-09-26 21:42:02,055 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:02,056 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:02,056 INFO L82 PathProgramCache]: Analyzing trace with hash -810295359, now seen corresponding path program 24 times [2018-09-26 21:42:02,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:02,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:02,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:02,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:02,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:02,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:02,770 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:02,771 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:02,771 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:02,778 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:42:02,845 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-26 21:42:02,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:02,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:03,001 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:03,001 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-26 21:42:03,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-26 21:42:03,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-26 21:42:03,002 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:03,002 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-09-26 21:42:03,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:03,177 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-26 21:42:03,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:42:03,178 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-09-26 21:42:03,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:03,178 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:42:03,178 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:42:03,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:03,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:42:03,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-26 21:42:03,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-26 21:42:03,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-26 21:42:03,182 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-26 21:42:03,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:03,182 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-26 21:42:03,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-26 21:42:03,182 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-26 21:42:03,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-26 21:42:03,183 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:03,183 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-26 21:42:03,183 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:03,183 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:03,183 INFO L82 PathProgramCache]: Analyzing trace with hash 650645672, now seen corresponding path program 25 times [2018-09-26 21:42:03,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:03,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:03,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:03,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:03,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:03,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:03,645 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:03,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:03,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:03,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:03,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:03,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:03,760 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:03,781 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:03,781 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-26 21:42:03,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:42:03,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:42:03,782 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:03,782 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-09-26 21:42:03,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:03,967 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-26 21:42:03,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:42:03,968 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-09-26 21:42:03,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:03,969 INFO L225 Difference]: With dead ends: 32 [2018-09-26 21:42:03,969 INFO L226 Difference]: Without dead ends: 30 [2018-09-26 21:42:03,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:03,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-26 21:42:03,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-26 21:42:03,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:42:03,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-26 21:42:03,973 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-26 21:42:03,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:03,973 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-26 21:42:03,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:42:03,973 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-26 21:42:03,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-26 21:42:03,974 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:03,974 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-26 21:42:03,974 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:03,974 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:03,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1304822623, now seen corresponding path program 26 times [2018-09-26 21:42:03,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:03,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:03,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:03,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:03,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:04,770 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:04,770 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:04,770 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:04,778 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:42:04,819 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:42:04,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:04,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:04,908 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:04,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:04,930 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-26 21:42:04,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:42:04,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:42:04,931 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:04,931 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-09-26 21:42:05,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:05,150 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-26 21:42:05,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:42:05,151 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-09-26 21:42:05,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:05,151 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:42:05,151 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:42:05,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:05,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:42:05,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-26 21:42:05,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-26 21:42:05,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-26 21:42:05,155 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-26 21:42:05,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:05,156 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-26 21:42:05,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:42:05,156 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-26 21:42:05,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-26 21:42:05,156 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:05,157 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-26 21:42:05,158 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:05,158 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:05,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1794797624, now seen corresponding path program 27 times [2018-09-26 21:42:05,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:05,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:05,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:05,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:05,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:05,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:05,631 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:05,631 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:05,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:05,639 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:42:05,691 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-26 21:42:05,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:05,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:05,782 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:05,802 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:05,803 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-26 21:42:05,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:42:05,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:42:05,804 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:05,804 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-09-26 21:42:05,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:05,999 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-26 21:42:05,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:42:06,000 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-26 21:42:06,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:06,000 INFO L225 Difference]: With dead ends: 34 [2018-09-26 21:42:06,001 INFO L226 Difference]: Without dead ends: 32 [2018-09-26 21:42:06,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:06,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-26 21:42:06,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-26 21:42:06,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:42:06,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-26 21:42:06,006 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-26 21:42:06,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:06,006 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-26 21:42:06,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:42:06,007 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-26 21:42:06,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-26 21:42:06,007 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:06,007 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-26 21:42:06,007 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:06,008 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:06,008 INFO L82 PathProgramCache]: Analyzing trace with hash 195846529, now seen corresponding path program 28 times [2018-09-26 21:42:06,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:06,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:06,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:06,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:06,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:06,290 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:06,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:06,301 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:42:06,344 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:42:06,344 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:06,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:06,413 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:06,434 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:06,434 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-26 21:42:06,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-26 21:42:06,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-26 21:42:06,435 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:06,435 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-09-26 21:42:06,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:06,583 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-26 21:42:06,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:42:06,584 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-09-26 21:42:06,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:06,584 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:42:06,584 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:42:06,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:06,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:42:06,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-26 21:42:06,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-26 21:42:06,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-26 21:42:06,588 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-26 21:42:06,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:06,589 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-26 21:42:06,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-26 21:42:06,589 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-26 21:42:06,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-26 21:42:06,589 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:06,590 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-26 21:42:06,590 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:06,590 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:06,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1776273128, now seen corresponding path program 29 times [2018-09-26 21:42:06,590 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:06,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:06,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:06,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:06,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:06,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:06,860 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:06,860 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:06,860 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:06,869 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:42:06,920 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-26 21:42:06,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:06,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:07,000 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:07,021 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:07,022 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-26 21:42:07,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:42:07,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:42:07,022 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:07,022 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-09-26 21:42:07,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:07,172 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-26 21:42:07,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:42:07,173 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-09-26 21:42:07,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:07,173 INFO L225 Difference]: With dead ends: 36 [2018-09-26 21:42:07,173 INFO L226 Difference]: Without dead ends: 34 [2018-09-26 21:42:07,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:07,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-26 21:42:07,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-26 21:42:07,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:42:07,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-26 21:42:07,176 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-26 21:42:07,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:07,176 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-26 21:42:07,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:42:07,177 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-26 21:42:07,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-26 21:42:07,177 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:07,177 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-09-26 21:42:07,177 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:07,177 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:07,177 INFO L82 PathProgramCache]: Analyzing trace with hash -770109855, now seen corresponding path program 30 times [2018-09-26 21:42:07,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:07,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:07,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:07,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:07,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:08,165 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:08,165 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:08,165 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:08,176 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:42:08,237 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-26 21:42:08,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:08,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:08,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:08,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-26 21:42:08,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-26 21:42:08,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-26 21:42:08,375 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:08,375 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-09-26 21:42:08,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:08,505 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-26 21:42:08,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:42:08,506 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-09-26 21:42:08,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:08,506 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:42:08,506 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:42:08,506 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:08,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:42:08,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-26 21:42:08,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-26 21:42:08,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-26 21:42:08,509 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-26 21:42:08,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:08,509 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-26 21:42:08,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-26 21:42:08,510 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-26 21:42:08,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-26 21:42:08,510 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:08,510 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-26 21:42:08,510 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:08,510 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:08,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1896396296, now seen corresponding path program 31 times [2018-09-26 21:42:08,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:08,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:08,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:08,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:08,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:08,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:08,890 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:08,891 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:08,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:08,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:08,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:09,017 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:09,037 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:09,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-26 21:42:09,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:42:09,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:42:09,038 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:09,038 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-09-26 21:42:09,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:09,264 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-26 21:42:09,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:42:09,265 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-09-26 21:42:09,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:09,265 INFO L225 Difference]: With dead ends: 38 [2018-09-26 21:42:09,266 INFO L226 Difference]: Without dead ends: 36 [2018-09-26 21:42:09,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:09,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-26 21:42:09,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-26 21:42:09,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-26 21:42:09,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-26 21:42:09,270 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-26 21:42:09,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:09,271 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-26 21:42:09,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:42:09,271 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-26 21:42:09,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-26 21:42:09,272 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:09,272 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-09-26 21:42:09,272 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:09,272 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:09,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1341258943, now seen corresponding path program 32 times [2018-09-26 21:42:09,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:09,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:09,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:09,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:09,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:10,024 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:10,024 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:10,024 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:10,032 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:42:10,080 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:42:10,080 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:10,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:10,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:10,175 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-26 21:42:10,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-26 21:42:10,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-26 21:42:10,176 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:10,176 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-09-26 21:42:10,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:10,396 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-26 21:42:10,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:42:10,396 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-09-26 21:42:10,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:10,397 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:42:10,397 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:42:10,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:10,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:42:10,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-26 21:42:10,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-26 21:42:10,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-26 21:42:10,400 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-26 21:42:10,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:10,400 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-26 21:42:10,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-26 21:42:10,400 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-26 21:42:10,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-26 21:42:10,401 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:10,401 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-26 21:42:10,401 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:10,401 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:10,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1370643752, now seen corresponding path program 33 times [2018-09-26 21:42:10,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:10,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:10,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:10,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:10,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:10,745 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:10,745 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:10,752 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:42:10,819 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-26 21:42:10,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:10,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:10,943 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:10,943 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-26 21:42:10,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:42:10,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:42:10,944 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:10,944 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-09-26 21:42:11,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:11,139 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-26 21:42:11,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:42:11,140 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-09-26 21:42:11,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:11,140 INFO L225 Difference]: With dead ends: 40 [2018-09-26 21:42:11,141 INFO L226 Difference]: Without dead ends: 38 [2018-09-26 21:42:11,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:11,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-26 21:42:11,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-26 21:42:11,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-26 21:42:11,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-26 21:42:11,144 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-26 21:42:11,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:11,144 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-26 21:42:11,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:42:11,145 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-26 21:42:11,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-26 21:42:11,145 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:11,145 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-09-26 21:42:11,145 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:11,145 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:11,145 INFO L82 PathProgramCache]: Analyzing trace with hash -459718623, now seen corresponding path program 34 times [2018-09-26 21:42:11,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:11,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:11,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:11,146 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:11,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:11,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:12,010 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:12,010 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:12,010 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:12,017 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:42:12,065 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:42:12,065 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:12,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:12,314 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:12,335 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:12,336 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-26 21:42:12,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-26 21:42:12,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-26 21:42:12,336 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:12,336 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-09-26 21:42:12,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:12,707 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-26 21:42:12,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:42:12,707 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-09-26 21:42:12,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:12,708 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:42:12,708 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:42:12,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:12,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:42:12,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-26 21:42:12,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-26 21:42:12,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-26 21:42:12,712 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-26 21:42:12,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:12,712 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-26 21:42:12,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-26 21:42:12,712 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-26 21:42:12,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-26 21:42:12,713 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:12,713 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-26 21:42:12,713 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:12,713 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:12,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1366377400, now seen corresponding path program 35 times [2018-09-26 21:42:12,713 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:12,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:12,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:12,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:12,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:12,989 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:12,990 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:12,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:12,997 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:42:13,058 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-26 21:42:13,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:13,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:13,179 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:13,179 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-26 21:42:13,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:42:13,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:42:13,180 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:13,180 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-09-26 21:42:13,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:13,432 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-26 21:42:13,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:42:13,433 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-09-26 21:42:13,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:13,434 INFO L225 Difference]: With dead ends: 42 [2018-09-26 21:42:13,434 INFO L226 Difference]: Without dead ends: 40 [2018-09-26 21:42:13,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:13,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-26 21:42:13,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-26 21:42:13,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-26 21:42:13,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-26 21:42:13,436 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-26 21:42:13,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:13,436 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-26 21:42:13,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:42:13,436 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-26 21:42:13,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-26 21:42:13,437 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:13,437 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-09-26 21:42:13,437 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:13,437 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:13,438 INFO L82 PathProgramCache]: Analyzing trace with hash 591971585, now seen corresponding path program 36 times [2018-09-26 21:42:13,439 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:13,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:13,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:13,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:13,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:13,751 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:13,751 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:13,758 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:42:13,817 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-26 21:42:13,817 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:13,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:14,396 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:14,396 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-26 21:42:14,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-26 21:42:14,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-26 21:42:14,397 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:14,397 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-09-26 21:42:14,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:14,647 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-26 21:42:14,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:42:14,648 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-09-26 21:42:14,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:14,648 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:42:14,649 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:42:14,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:14,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:42:14,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-26 21:42:14,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-26 21:42:14,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-26 21:42:14,652 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-26 21:42:14,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:14,652 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-26 21:42:14,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-26 21:42:14,653 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-26 21:42:14,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-26 21:42:14,653 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:14,653 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-26 21:42:14,653 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:14,653 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:14,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1171247976, now seen corresponding path program 37 times [2018-09-26 21:42:14,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:14,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:14,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:14,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:14,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:14,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:14,911 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:14,912 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:14,912 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:14,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:14,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:14,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:15,105 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:15,127 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:15,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-26 21:42:15,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:42:15,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:42:15,128 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:15,128 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-09-26 21:42:15,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:15,378 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-26 21:42:15,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-26 21:42:15,379 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-09-26 21:42:15,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:15,379 INFO L225 Difference]: With dead ends: 44 [2018-09-26 21:42:15,380 INFO L226 Difference]: Without dead ends: 42 [2018-09-26 21:42:15,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:15,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-26 21:42:15,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-26 21:42:15,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-26 21:42:15,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-26 21:42:15,383 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-26 21:42:15,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:15,384 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-26 21:42:15,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:42:15,384 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-26 21:42:15,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-26 21:42:15,384 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:15,384 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-09-26 21:42:15,385 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:15,385 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:15,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1948946913, now seen corresponding path program 38 times [2018-09-26 21:42:15,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:15,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:15,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:15,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:15,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:15,728 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:15,729 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:15,729 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:15,736 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:42:15,791 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:42:15,791 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:15,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:15,922 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:15,922 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-26 21:42:15,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:42:15,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:42:15,923 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:15,923 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-09-26 21:42:16,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:16,169 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-26 21:42:16,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:42:16,170 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-09-26 21:42:16,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:16,170 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:42:16,170 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:42:16,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:16,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:42:16,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-26 21:42:16,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-26 21:42:16,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-26 21:42:16,175 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-26 21:42:16,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:16,175 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-26 21:42:16,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:42:16,176 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-26 21:42:16,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-26 21:42:16,176 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:16,176 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-26 21:42:16,176 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:16,176 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:16,177 INFO L82 PathProgramCache]: Analyzing trace with hash 287810184, now seen corresponding path program 39 times [2018-09-26 21:42:16,177 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:16,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:16,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:16,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:16,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:16,600 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:16,600 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:16,608 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:42:16,679 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-26 21:42:16,679 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:16,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:16,828 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:16,848 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:16,848 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-26 21:42:16,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:42:16,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:42:16,849 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:16,849 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-09-26 21:42:17,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:17,061 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-26 21:42:17,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:42:17,062 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-09-26 21:42:17,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:17,062 INFO L225 Difference]: With dead ends: 46 [2018-09-26 21:42:17,063 INFO L226 Difference]: Without dead ends: 44 [2018-09-26 21:42:17,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:17,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-26 21:42:17,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-26 21:42:17,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-26 21:42:17,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-26 21:42:17,065 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-26 21:42:17,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:17,065 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-26 21:42:17,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:42:17,065 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-26 21:42:17,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-26 21:42:17,066 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:17,066 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-09-26 21:42:17,066 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:17,066 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:17,066 INFO L82 PathProgramCache]: Analyzing trace with hash 332179137, now seen corresponding path program 40 times [2018-09-26 21:42:17,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:17,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:17,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:17,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:17,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:17,833 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:17,833 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:17,840 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:42:17,902 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:42:17,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:17,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:18,030 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:18,051 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:18,052 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-26 21:42:18,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-26 21:42:18,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-26 21:42:18,052 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:18,053 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-09-26 21:42:18,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:18,421 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-26 21:42:18,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:42:18,422 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-09-26 21:42:18,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:18,423 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:42:18,423 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:42:18,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:18,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:42:18,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-26 21:42:18,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-26 21:42:18,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-26 21:42:18,425 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-26 21:42:18,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:18,426 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-26 21:42:18,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-26 21:42:18,426 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-26 21:42:18,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-26 21:42:18,426 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:18,426 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-26 21:42:18,427 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:18,427 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:18,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1707616680, now seen corresponding path program 41 times [2018-09-26 21:42:18,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:18,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:18,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:18,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:18,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:18,731 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:18,731 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:18,731 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:18,739 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:42:18,820 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-26 21:42:18,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:18,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:18,946 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:18,966 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:18,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-26 21:42:18,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:42:18,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:42:18,967 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:18,967 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-09-26 21:42:19,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:19,315 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-26 21:42:19,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-26 21:42:19,315 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-09-26 21:42:19,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:19,316 INFO L225 Difference]: With dead ends: 48 [2018-09-26 21:42:19,316 INFO L226 Difference]: Without dead ends: 46 [2018-09-26 21:42:19,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:19,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-26 21:42:19,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-26 21:42:19,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-26 21:42:19,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-26 21:42:19,319 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-26 21:42:19,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:19,319 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-26 21:42:19,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:42:19,319 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-26 21:42:19,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-26 21:42:19,320 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:19,320 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-09-26 21:42:19,320 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:19,321 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:19,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1396507553, now seen corresponding path program 42 times [2018-09-26 21:42:19,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:19,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:19,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:19,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:19,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:19,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:19,717 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:19,717 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:19,731 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:42:19,816 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-26 21:42:19,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:19,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:19,971 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:19,992 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:19,992 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-26 21:42:19,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-26 21:42:19,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-26 21:42:19,994 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:19,994 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-09-26 21:42:20,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:20,313 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-26 21:42:20,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-26 21:42:20,314 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-09-26 21:42:20,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:20,314 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:42:20,314 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:42:20,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:20,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:42:20,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-26 21:42:20,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-26 21:42:20,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-26 21:42:20,318 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-26 21:42:20,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:20,318 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-26 21:42:20,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-26 21:42:20,318 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-26 21:42:20,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-26 21:42:20,319 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:20,319 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-26 21:42:20,319 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:20,319 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:20,319 INFO L82 PathProgramCache]: Analyzing trace with hash 342059208, now seen corresponding path program 43 times [2018-09-26 21:42:20,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:20,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:20,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:20,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:20,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:20,670 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:20,670 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:20,670 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:20,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:20,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:20,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:20,882 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:20,882 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-26 21:42:20,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-26 21:42:20,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-26 21:42:20,883 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:20,883 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-09-26 21:42:21,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:21,171 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-26 21:42:21,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-26 21:42:21,173 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-09-26 21:42:21,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:21,173 INFO L225 Difference]: With dead ends: 50 [2018-09-26 21:42:21,173 INFO L226 Difference]: Without dead ends: 48 [2018-09-26 21:42:21,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:21,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-26 21:42:21,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-26 21:42:21,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-26 21:42:21,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-26 21:42:21,176 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-26 21:42:21,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:21,176 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-26 21:42:21,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-26 21:42:21,176 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-26 21:42:21,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-26 21:42:21,177 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:21,177 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-09-26 21:42:21,177 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:21,177 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:21,177 INFO L82 PathProgramCache]: Analyzing trace with hash 2013898881, now seen corresponding path program 44 times [2018-09-26 21:42:21,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:21,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:21,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:21,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:21,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:21,512 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:21,512 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:21,512 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:21,519 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:42:21,585 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:42:21,585 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:21,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:21,697 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:21,717 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:21,717 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-26 21:42:21,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-26 21:42:21,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-26 21:42:21,718 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:21,718 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-09-26 21:42:22,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:22,086 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-26 21:42:22,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:42:22,087 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-09-26 21:42:22,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:22,087 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:42:22,087 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:42:22,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:22,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:42:22,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-26 21:42:22,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-26 21:42:22,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-26 21:42:22,090 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-26 21:42:22,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:22,090 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-26 21:42:22,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-26 21:42:22,090 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-26 21:42:22,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-26 21:42:22,091 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:22,091 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-26 21:42:22,091 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:22,091 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:22,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1993646104, now seen corresponding path program 45 times [2018-09-26 21:42:22,092 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:22,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:22,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:22,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:22,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:22,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:22,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:22,414 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:22,414 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:22,424 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:42:22,508 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-26 21:42:22,508 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:22,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:22,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:22,722 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:22,723 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-26 21:42:22,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:42:22,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:42:22,724 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:22,724 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-09-26 21:42:23,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:23,228 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-26 21:42:23,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-26 21:42:23,229 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-09-26 21:42:23,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:23,230 INFO L225 Difference]: With dead ends: 52 [2018-09-26 21:42:23,230 INFO L226 Difference]: Without dead ends: 50 [2018-09-26 21:42:23,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:23,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-26 21:42:23,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-26 21:42:23,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-26 21:42:23,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-26 21:42:23,232 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-26 21:42:23,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:23,232 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-26 21:42:23,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:42:23,232 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-26 21:42:23,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-26 21:42:23,232 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:23,233 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-09-26 21:42:23,233 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:23,233 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:23,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1673489055, now seen corresponding path program 46 times [2018-09-26 21:42:23,233 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:23,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:23,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:23,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:23,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:23,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:23,574 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:23,574 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:23,581 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:42:23,650 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:42:23,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:23,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:23,851 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:23,852 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-26 21:42:23,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-26 21:42:23,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-26 21:42:23,852 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:23,852 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-09-26 21:42:24,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:24,169 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-26 21:42:24,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:42:24,170 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-09-26 21:42:24,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:24,170 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:42:24,171 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:42:24,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:24,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:42:24,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-26 21:42:24,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-26 21:42:24,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-26 21:42:24,172 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-26 21:42:24,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:24,173 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-26 21:42:24,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-26 21:42:24,173 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-26 21:42:24,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-26 21:42:24,173 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:24,174 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-26 21:42:24,174 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:24,174 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:24,174 INFO L82 PathProgramCache]: Analyzing trace with hash -338555128, now seen corresponding path program 47 times [2018-09-26 21:42:24,174 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:24,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:24,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:24,175 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:24,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:24,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:24,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:24,784 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:24,784 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:24,792 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:42:24,876 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-26 21:42:24,877 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:24,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:25,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:25,021 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:25,021 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-26 21:42:25,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:42:25,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:42:25,022 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:25,022 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-09-26 21:42:25,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:25,300 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-26 21:42:25,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:42:25,300 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-09-26 21:42:25,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:25,301 INFO L225 Difference]: With dead ends: 54 [2018-09-26 21:42:25,301 INFO L226 Difference]: Without dead ends: 52 [2018-09-26 21:42:25,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:25,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-26 21:42:25,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-26 21:42:25,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-26 21:42:25,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-26 21:42:25,304 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-26 21:42:25,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:25,304 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-26 21:42:25,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:42:25,304 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-26 21:42:25,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-26 21:42:25,305 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:25,305 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-09-26 21:42:25,305 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:25,305 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:25,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1905276351, now seen corresponding path program 48 times [2018-09-26 21:42:25,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:25,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:25,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:25,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:25,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:25,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:25,617 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:25,618 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:25,625 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:42:25,718 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-26 21:42:25,719 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:25,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:25,871 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:25,871 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-26 21:42:25,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-26 21:42:25,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-26 21:42:25,872 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:25,872 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-09-26 21:42:26,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:26,142 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-26 21:42:26,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:42:26,143 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-09-26 21:42:26,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:26,143 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:42:26,143 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:42:26,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:26,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:42:26,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-26 21:42:26,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-26 21:42:26,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-26 21:42:26,146 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-26 21:42:26,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:26,146 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-26 21:42:26,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-26 21:42:26,146 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-26 21:42:26,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-26 21:42:26,146 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:26,146 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-26 21:42:26,147 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:26,147 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:26,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1065973288, now seen corresponding path program 49 times [2018-09-26 21:42:26,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:26,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:26,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:26,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:26,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:27,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:27,136 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:27,136 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:27,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:27,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:27,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:27,359 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:27,359 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-26 21:42:27,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-26 21:42:27,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-26 21:42:27,360 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:27,360 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-09-26 21:42:27,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:27,642 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-26 21:42:27,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-26 21:42:27,642 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-09-26 21:42:27,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:27,643 INFO L225 Difference]: With dead ends: 56 [2018-09-26 21:42:27,643 INFO L226 Difference]: Without dead ends: 54 [2018-09-26 21:42:27,643 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:27,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-26 21:42:27,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-26 21:42:27,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-26 21:42:27,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-26 21:42:27,645 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-26 21:42:27,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:27,645 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-26 21:42:27,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-26 21:42:27,645 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-26 21:42:27,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-26 21:42:27,646 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:27,646 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-09-26 21:42:27,646 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:27,646 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:27,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1314568415, now seen corresponding path program 50 times [2018-09-26 21:42:27,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:27,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:27,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:27,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:27,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:27,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:28,302 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:28,302 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:28,311 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:42:28,384 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:42:28,384 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:28,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:28,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:28,531 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:28,531 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-26 21:42:28,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-26 21:42:28,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-26 21:42:28,532 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:28,532 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-09-26 21:42:28,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:28,828 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-26 21:42:28,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:42:28,828 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-09-26 21:42:28,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:28,829 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:42:28,829 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:42:28,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:28,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:42:28,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-26 21:42:28,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-26 21:42:28,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-26 21:42:28,831 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-26 21:42:28,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:28,831 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-26 21:42:28,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-26 21:42:28,831 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-26 21:42:28,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-26 21:42:28,832 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:28,832 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-26 21:42:28,832 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:28,832 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:28,832 INFO L82 PathProgramCache]: Analyzing trace with hash -2096917176, now seen corresponding path program 51 times [2018-09-26 21:42:28,833 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:28,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:28,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:28,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:28,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:28,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:29,540 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:29,540 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:29,549 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:42:29,644 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-26 21:42:29,644 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:29,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:29,903 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:29,903 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-26 21:42:29,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-26 21:42:29,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-26 21:42:29,904 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:29,904 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-09-26 21:42:30,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:30,338 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-26 21:42:30,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-26 21:42:30,339 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-09-26 21:42:30,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:30,339 INFO L225 Difference]: With dead ends: 58 [2018-09-26 21:42:30,340 INFO L226 Difference]: Without dead ends: 56 [2018-09-26 21:42:30,340 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:30,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-26 21:42:30,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-26 21:42:30,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-26 21:42:30,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-26 21:42:30,343 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-26 21:42:30,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:30,343 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-26 21:42:30,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-26 21:42:30,343 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-26 21:42:30,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-26 21:42:30,344 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:30,344 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-09-26 21:42:30,344 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:30,344 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:30,344 INFO L82 PathProgramCache]: Analyzing trace with hash -579924991, now seen corresponding path program 52 times [2018-09-26 21:42:30,344 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:30,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:30,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:30,345 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:30,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:31,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:31,450 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:31,450 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:31,458 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:42:31,540 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:42:31,540 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:31,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:31,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:31,697 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:31,697 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-26 21:42:31,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-26 21:42:31,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-26 21:42:31,698 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:31,698 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-09-26 21:42:32,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:32,053 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-26 21:42:32,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:42:32,054 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-09-26 21:42:32,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:32,055 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:42:32,055 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:42:32,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:32,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:42:32,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-26 21:42:32,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-26 21:42:32,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-26 21:42:32,057 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-26 21:42:32,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:32,058 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-26 21:42:32,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-26 21:42:32,058 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-26 21:42:32,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-26 21:42:32,058 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:32,059 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-26 21:42:32,059 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:32,059 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:32,059 INFO L82 PathProgramCache]: Analyzing trace with hash -797807512, now seen corresponding path program 53 times [2018-09-26 21:42:32,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:32,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:32,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:32,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:32,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:32,675 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:32,675 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:32,699 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:42:32,792 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-26 21:42:32,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:32,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:33,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:33,095 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:33,095 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-26 21:42:33,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-26 21:42:33,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-26 21:42:33,096 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:33,096 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-09-26 21:42:33,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:33,539 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-26 21:42:33,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-26 21:42:33,539 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-09-26 21:42:33,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:33,540 INFO L225 Difference]: With dead ends: 60 [2018-09-26 21:42:33,540 INFO L226 Difference]: Without dead ends: 58 [2018-09-26 21:42:33,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:33,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-26 21:42:33,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-26 21:42:33,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-26 21:42:33,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-26 21:42:33,542 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-26 21:42:33,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:33,542 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-26 21:42:33,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-26 21:42:33,543 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-26 21:42:33,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-26 21:42:33,543 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:33,543 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-09-26 21:42:33,543 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:33,543 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:33,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1037768929, now seen corresponding path program 54 times [2018-09-26 21:42:33,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:33,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:33,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:33,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:33,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:33,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:33,990 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:33,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:34,000 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:42:34,095 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-26 21:42:34,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:34,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:34,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:34,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:34,328 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-26 21:42:34,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-26 21:42:34,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-26 21:42:34,329 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:34,329 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-09-26 21:42:34,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:34,672 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-26 21:42:34,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-26 21:42:34,672 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-09-26 21:42:34,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:34,673 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:42:34,673 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:42:34,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:34,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:42:34,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-26 21:42:34,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-26 21:42:34,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-26 21:42:34,675 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-26 21:42:34,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:34,675 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-26 21:42:34,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-26 21:42:34,675 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-26 21:42:34,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-26 21:42:34,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:34,676 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-26 21:42:34,677 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:34,677 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:34,677 INFO L82 PathProgramCache]: Analyzing trace with hash 2106063752, now seen corresponding path program 55 times [2018-09-26 21:42:34,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:34,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:34,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:34,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:34,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:35,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:35,097 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:35,097 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:35,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:35,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:35,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:35,347 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:35,347 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-26 21:42:35,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-26 21:42:35,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-26 21:42:35,349 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:35,349 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-09-26 21:42:35,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:35,753 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-26 21:42:35,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-26 21:42:35,753 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-09-26 21:42:35,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:35,754 INFO L225 Difference]: With dead ends: 62 [2018-09-26 21:42:35,754 INFO L226 Difference]: Without dead ends: 60 [2018-09-26 21:42:35,754 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:35,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-26 21:42:35,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-26 21:42:35,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-26 21:42:35,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-26 21:42:35,756 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-26 21:42:35,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:35,757 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-26 21:42:35,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-26 21:42:35,757 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-26 21:42:35,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-26 21:42:35,757 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:35,757 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-09-26 21:42:35,758 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:35,758 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:35,758 INFO L82 PathProgramCache]: Analyzing trace with hash 863464897, now seen corresponding path program 56 times [2018-09-26 21:42:35,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:35,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:35,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:35,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:35,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:35,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:36,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:36,137 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:36,137 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:36,161 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:42:36,245 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:42:36,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:36,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:36,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:36,424 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:36,424 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-26 21:42:36,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-26 21:42:36,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-26 21:42:36,425 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:36,425 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-09-26 21:42:36,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:36,781 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-26 21:42:36,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-26 21:42:36,782 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-09-26 21:42:36,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:36,782 INFO L225 Difference]: With dead ends: 63 [2018-09-26 21:42:36,782 INFO L226 Difference]: Without dead ends: 61 [2018-09-26 21:42:36,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:36,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-26 21:42:36,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-26 21:42:36,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-26 21:42:36,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-26 21:42:36,785 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-26 21:42:36,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:36,785 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-26 21:42:36,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-26 21:42:36,786 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-26 21:42:36,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-26 21:42:36,786 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:36,786 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-26 21:42:36,786 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:36,787 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:36,787 INFO L82 PathProgramCache]: Analyzing trace with hash 997606056, now seen corresponding path program 57 times [2018-09-26 21:42:36,787 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:36,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:36,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:36,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:36,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:36,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:37,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:37,419 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:37,419 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:37,426 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:42:37,525 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-26 21:42:37,525 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:37,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:39,063 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:39,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-26 21:42:39,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-26 21:42:39,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-26 21:42:39,064 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:39,064 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-09-26 21:42:39,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:39,470 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-26 21:42:39,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-26 21:42:39,470 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-09-26 21:42:39,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:39,471 INFO L225 Difference]: With dead ends: 64 [2018-09-26 21:42:39,471 INFO L226 Difference]: Without dead ends: 62 [2018-09-26 21:42:39,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:39,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-26 21:42:39,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-26 21:42:39,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-26 21:42:39,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-26 21:42:39,474 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-26 21:42:39,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:39,474 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-26 21:42:39,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-26 21:42:39,474 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-26 21:42:39,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-26 21:42:39,475 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:39,475 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-09-26 21:42:39,475 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:39,475 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:39,475 INFO L82 PathProgramCache]: Analyzing trace with hash 861014689, now seen corresponding path program 58 times [2018-09-26 21:42:39,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:39,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:39,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:39,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:39,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:39,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:40,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:40,052 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:40,052 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:40,062 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:42:40,150 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:42:40,151 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:40,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:40,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:40,322 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:40,322 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-26 21:42:40,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-26 21:42:40,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-26 21:42:40,323 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:40,323 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-09-26 21:42:40,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:40,763 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-26 21:42:40,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-26 21:42:40,763 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-09-26 21:42:40,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:40,764 INFO L225 Difference]: With dead ends: 65 [2018-09-26 21:42:40,764 INFO L226 Difference]: Without dead ends: 63 [2018-09-26 21:42:40,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:40,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-26 21:42:40,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-26 21:42:40,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-26 21:42:40,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-26 21:42:40,766 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-26 21:42:40,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:40,766 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-26 21:42:40,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-26 21:42:40,766 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-26 21:42:40,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-26 21:42:40,767 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:40,767 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-26 21:42:40,767 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:40,767 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:40,767 INFO L82 PathProgramCache]: Analyzing trace with hash 921649608, now seen corresponding path program 59 times [2018-09-26 21:42:40,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:40,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:40,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:40,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:40,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:41,267 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:41,267 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:41,275 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:42:41,380 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-26 21:42:41,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:41,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:41,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:41,621 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:41,621 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-26 21:42:41,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-26 21:42:41,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-26 21:42:41,622 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:41,622 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-09-26 21:42:42,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:42,064 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-26 21:42:42,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-26 21:42:42,065 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-09-26 21:42:42,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:42,065 INFO L225 Difference]: With dead ends: 66 [2018-09-26 21:42:42,066 INFO L226 Difference]: Without dead ends: 64 [2018-09-26 21:42:42,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:42,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-26 21:42:42,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-26 21:42:42,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-26 21:42:42,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-26 21:42:42,068 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-26 21:42:42,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:42,068 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-26 21:42:42,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-26 21:42:42,068 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-26 21:42:42,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-26 21:42:42,068 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:42,068 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-09-26 21:42:42,069 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:42,069 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:42,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1493635199, now seen corresponding path program 60 times [2018-09-26 21:42:42,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:42,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:42,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:42,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:42,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:42,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:42,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:42,505 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:42,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:42,515 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:42:42,617 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-26 21:42:42,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:42,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:42,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:42,807 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:42,807 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-26 21:42:42,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-26 21:42:42,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-26 21:42:42,808 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:42,808 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-09-26 21:42:43,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:43,189 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-26 21:42:43,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-26 21:42:43,189 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-09-26 21:42:43,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:43,190 INFO L225 Difference]: With dead ends: 67 [2018-09-26 21:42:43,190 INFO L226 Difference]: Without dead ends: 65 [2018-09-26 21:42:43,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:43,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-26 21:42:43,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-26 21:42:43,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-26 21:42:43,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-26 21:42:43,192 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-26 21:42:43,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:43,192 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-26 21:42:43,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-26 21:42:43,192 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-26 21:42:43,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-26 21:42:43,193 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:43,193 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-26 21:42:43,193 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:43,193 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:43,193 INFO L82 PathProgramCache]: Analyzing trace with hash 941947112, now seen corresponding path program 61 times [2018-09-26 21:42:43,193 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:43,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:43,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:43,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:43,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:43,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:43,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:43,755 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:43,755 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:43,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:43,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:43,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:44,033 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:44,034 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-26 21:42:44,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-26 21:42:44,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-26 21:42:44,035 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:44,035 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-09-26 21:42:44,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:44,401 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-26 21:42:44,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-26 21:42:44,401 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-09-26 21:42:44,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:44,402 INFO L225 Difference]: With dead ends: 68 [2018-09-26 21:42:44,402 INFO L226 Difference]: Without dead ends: 66 [2018-09-26 21:42:44,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:44,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-26 21:42:44,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-26 21:42:44,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-26 21:42:44,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-26 21:42:44,404 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-26 21:42:44,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:44,404 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-26 21:42:44,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-26 21:42:44,405 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-26 21:42:44,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-26 21:42:44,405 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:44,405 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-09-26 21:42:44,405 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:44,405 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:44,406 INFO L82 PathProgramCache]: Analyzing trace with hash -864412575, now seen corresponding path program 62 times [2018-09-26 21:42:44,406 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:44,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:44,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:44,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:44,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:44,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:44,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:44,846 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:44,854 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:42:44,951 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:42:44,952 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:44,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:45,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:45,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:45,375 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-26 21:42:45,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-26 21:42:45,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-26 21:42:45,376 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:45,376 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-09-26 21:42:45,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:45,815 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-26 21:42:45,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-26 21:42:45,815 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-09-26 21:42:45,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:45,816 INFO L225 Difference]: With dead ends: 69 [2018-09-26 21:42:45,816 INFO L226 Difference]: Without dead ends: 67 [2018-09-26 21:42:45,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:45,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-26 21:42:45,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-26 21:42:45,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-26 21:42:45,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-26 21:42:45,819 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-26 21:42:45,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:45,819 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-26 21:42:45,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-26 21:42:45,819 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-26 21:42:45,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-26 21:42:45,819 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:45,819 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-26 21:42:45,820 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:45,820 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:45,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1026988024, now seen corresponding path program 63 times [2018-09-26 21:42:45,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:45,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:45,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:45,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:45,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:46,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:46,217 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:46,217 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:46,228 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:42:46,397 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-26 21:42:46,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:46,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:46,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:46,610 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:46,611 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-26 21:42:46,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-26 21:42:46,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-26 21:42:46,612 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:46,612 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-09-26 21:42:47,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:47,107 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-26 21:42:47,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-26 21:42:47,108 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-09-26 21:42:47,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:47,108 INFO L225 Difference]: With dead ends: 70 [2018-09-26 21:42:47,108 INFO L226 Difference]: Without dead ends: 68 [2018-09-26 21:42:47,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:47,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-26 21:42:47,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-26 21:42:47,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-26 21:42:47,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-26 21:42:47,110 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-26 21:42:47,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:47,111 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-26 21:42:47,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-26 21:42:47,111 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-26 21:42:47,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-26 21:42:47,111 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:47,112 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-09-26 21:42:47,112 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:47,112 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:47,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1771859647, now seen corresponding path program 64 times [2018-09-26 21:42:47,112 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:47,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:47,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:47,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:47,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:47,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:47,541 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:47,541 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:47,557 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:42:47,657 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:42:47,658 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:47,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:47,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:47,967 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:47,968 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-26 21:42:47,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-26 21:42:47,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-26 21:42:47,969 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:47,969 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-09-26 21:42:48,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:48,627 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-26 21:42:48,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-26 21:42:48,627 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-09-26 21:42:48,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:48,628 INFO L225 Difference]: With dead ends: 71 [2018-09-26 21:42:48,628 INFO L226 Difference]: Without dead ends: 69 [2018-09-26 21:42:48,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:48,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-26 21:42:48,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-26 21:42:48,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-26 21:42:48,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-26 21:42:48,630 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-26 21:42:48,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:48,630 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-26 21:42:48,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-26 21:42:48,630 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-26 21:42:48,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-26 21:42:48,630 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:48,631 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-26 21:42:48,631 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:48,631 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:48,631 INFO L82 PathProgramCache]: Analyzing trace with hash 906923816, now seen corresponding path program 65 times [2018-09-26 21:42:48,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:48,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:48,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:48,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:48,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:49,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:49,071 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:49,072 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:49,080 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:42:49,203 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-26 21:42:49,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:49,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:49,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:49,412 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:49,412 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-26 21:42:49,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-26 21:42:49,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-26 21:42:49,413 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:49,414 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-09-26 21:42:49,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:49,904 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-26 21:42:49,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-26 21:42:49,905 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-09-26 21:42:49,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:49,906 INFO L225 Difference]: With dead ends: 72 [2018-09-26 21:42:49,906 INFO L226 Difference]: Without dead ends: 70 [2018-09-26 21:42:49,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:49,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-26 21:42:49,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-26 21:42:49,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-26 21:42:49,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-26 21:42:49,908 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-26 21:42:49,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:49,908 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-26 21:42:49,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-26 21:42:49,908 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-26 21:42:49,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-26 21:42:49,909 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:49,909 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-09-26 21:42:49,909 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:49,909 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:49,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1950134751, now seen corresponding path program 66 times [2018-09-26 21:42:49,909 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:49,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:49,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:49,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:49,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:49,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:50,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:50,331 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:50,331 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:50,339 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:42:50,459 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-26 21:42:50,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:50,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:51,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:51,756 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:51,756 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-26 21:42:51,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-26 21:42:51,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-26 21:42:51,758 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:51,758 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-09-26 21:42:52,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:52,112 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-26 21:42:52,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-26 21:42:52,113 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-09-26 21:42:52,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:52,113 INFO L225 Difference]: With dead ends: 73 [2018-09-26 21:42:52,113 INFO L226 Difference]: Without dead ends: 71 [2018-09-26 21:42:52,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:52,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-26 21:42:52,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-26 21:42:52,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-26 21:42:52,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-26 21:42:52,115 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-26 21:42:52,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:52,116 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-26 21:42:52,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-26 21:42:52,116 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-26 21:42:52,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-26 21:42:52,116 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:52,117 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-26 21:42:52,117 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:52,117 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:52,117 INFO L82 PathProgramCache]: Analyzing trace with hash -324637112, now seen corresponding path program 67 times [2018-09-26 21:42:52,117 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:52,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:52,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:52,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:52,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:52,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:52,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:52,606 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:52,606 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:52,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:52,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:53,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:53,350 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:53,350 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-26 21:42:53,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-26 21:42:53,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-26 21:42:53,351 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:53,351 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-09-26 21:42:54,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:54,017 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-26 21:42:54,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-26 21:42:54,017 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-09-26 21:42:54,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:54,017 INFO L225 Difference]: With dead ends: 74 [2018-09-26 21:42:54,017 INFO L226 Difference]: Without dead ends: 72 [2018-09-26 21:42:54,018 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:54,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-26 21:42:54,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-26 21:42:54,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-26 21:42:54,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-26 21:42:54,020 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-26 21:42:54,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:54,020 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-26 21:42:54,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-26 21:42:54,020 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-26 21:42:54,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-26 21:42:54,021 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:54,021 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-09-26 21:42:54,021 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:54,021 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:54,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1473817855, now seen corresponding path program 68 times [2018-09-26 21:42:54,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:54,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:54,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:54,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:42:54,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:54,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:54,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:54,469 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:54,469 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:54,476 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:42:54,574 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:42:54,574 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:54,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:54,781 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:54,781 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-26 21:42:54,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-26 21:42:54,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-26 21:42:54,782 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:54,783 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-09-26 21:42:55,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:55,199 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-26 21:42:55,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-26 21:42:55,199 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-09-26 21:42:55,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:55,200 INFO L225 Difference]: With dead ends: 75 [2018-09-26 21:42:55,200 INFO L226 Difference]: Without dead ends: 73 [2018-09-26 21:42:55,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:55,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-26 21:42:55,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-26 21:42:55,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-26 21:42:55,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-26 21:42:55,202 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-26 21:42:55,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:55,202 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-26 21:42:55,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-26 21:42:55,202 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-26 21:42:55,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-26 21:42:55,203 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:55,203 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-26 21:42:55,203 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:55,203 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:55,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1556284776, now seen corresponding path program 69 times [2018-09-26 21:42:55,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:55,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:55,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:55,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:55,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:55,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:55,688 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:55,688 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:55,695 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:42:55,851 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-26 21:42:55,851 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:55,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:56,053 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:56,053 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-26 21:42:56,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-26 21:42:56,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-26 21:42:56,055 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:56,055 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-09-26 21:42:56,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:56,602 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-26 21:42:56,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-26 21:42:56,602 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-09-26 21:42:56,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:56,603 INFO L225 Difference]: With dead ends: 76 [2018-09-26 21:42:56,603 INFO L226 Difference]: Without dead ends: 74 [2018-09-26 21:42:56,603 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:56,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-26 21:42:56,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-26 21:42:56,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-26 21:42:56,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-26 21:42:56,606 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-26 21:42:56,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:56,606 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-26 21:42:56,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-26 21:42:56,606 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-26 21:42:56,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-26 21:42:56,607 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:56,607 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-09-26 21:42:56,607 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:56,607 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:56,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1000185825, now seen corresponding path program 70 times [2018-09-26 21:42:56,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:56,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:56,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:56,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:56,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:56,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:57,863 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:57,863 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:57,870 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:42:57,977 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:42:57,977 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:57,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:58,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:58,210 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:58,210 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-26 21:42:58,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-26 21:42:58,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-26 21:42:58,212 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:58,212 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-09-26 21:42:58,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:42:58,865 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-26 21:42:58,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-26 21:42:58,865 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-09-26 21:42:58,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:42:58,866 INFO L225 Difference]: With dead ends: 77 [2018-09-26 21:42:58,866 INFO L226 Difference]: Without dead ends: 75 [2018-09-26 21:42:58,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:42:58,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-26 21:42:58,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-26 21:42:58,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-26 21:42:58,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-26 21:42:58,870 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-26 21:42:58,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:42:58,870 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-26 21:42:58,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-26 21:42:58,870 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-26 21:42:58,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-26 21:42:58,871 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:42:58,871 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-26 21:42:58,871 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:42:58,871 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:42:58,871 INFO L82 PathProgramCache]: Analyzing trace with hash 940987528, now seen corresponding path program 71 times [2018-09-26 21:42:58,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:42:58,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:42:58,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:58,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:42:58,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:42:58,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:42:59,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:59,380 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:42:59,380 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:42:59,387 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:42:59,524 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-26 21:42:59,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:42:59,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:42:59,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:42:59,940 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:42:59,940 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-26 21:42:59,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-26 21:42:59,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-26 21:42:59,942 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:42:59,942 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-09-26 21:43:00,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:00,521 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-26 21:43:00,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-26 21:43:00,521 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-09-26 21:43:00,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:00,522 INFO L225 Difference]: With dead ends: 78 [2018-09-26 21:43:00,522 INFO L226 Difference]: Without dead ends: 76 [2018-09-26 21:43:00,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:00,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-26 21:43:00,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-26 21:43:00,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-26 21:43:00,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-26 21:43:00,525 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-26 21:43:00,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:00,525 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-26 21:43:00,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-26 21:43:00,525 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-26 21:43:00,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-26 21:43:00,526 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:00,526 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-09-26 21:43:00,526 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:00,526 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:00,526 INFO L82 PathProgramCache]: Analyzing trace with hash -894159679, now seen corresponding path program 72 times [2018-09-26 21:43:00,527 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:00,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:00,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:00,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:43:00,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:00,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:01,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:01,103 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:01,103 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:01,111 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:43:01,239 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-26 21:43:01,239 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:43:01,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:01,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:01,485 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:01,485 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-26 21:43:01,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-26 21:43:01,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-26 21:43:01,487 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:01,487 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-09-26 21:43:02,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:02,081 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-26 21:43:02,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-26 21:43:02,081 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-09-26 21:43:02,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:02,082 INFO L225 Difference]: With dead ends: 79 [2018-09-26 21:43:02,082 INFO L226 Difference]: Without dead ends: 77 [2018-09-26 21:43:02,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:02,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-26 21:43:02,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-26 21:43:02,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-26 21:43:02,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-26 21:43:02,085 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-26 21:43:02,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:02,085 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-26 21:43:02,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-26 21:43:02,085 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-26 21:43:02,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-26 21:43:02,085 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:02,085 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-09-26 21:43:02,086 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:02,086 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:02,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1949148248, now seen corresponding path program 73 times [2018-09-26 21:43:02,086 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:02,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:02,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:02,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:43:02,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:02,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:02,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:02,604 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:02,604 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:02,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:43:02,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:02,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:02,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:02,943 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:02,943 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-26 21:43:02,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-26 21:43:02,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-26 21:43:02,944 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:02,944 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-09-26 21:43:03,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:03,522 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-26 21:43:03,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-26 21:43:03,522 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-09-26 21:43:03,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:03,522 INFO L225 Difference]: With dead ends: 80 [2018-09-26 21:43:03,522 INFO L226 Difference]: Without dead ends: 78 [2018-09-26 21:43:03,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:03,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-26 21:43:03,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-26 21:43:03,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-26 21:43:03,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-26 21:43:03,524 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-26 21:43:03,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:03,525 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-26 21:43:03,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-26 21:43:03,525 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-26 21:43:03,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-26 21:43:03,525 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:03,525 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-09-26 21:43:03,525 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:03,525 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:03,526 INFO L82 PathProgramCache]: Analyzing trace with hash -294055519, now seen corresponding path program 74 times [2018-09-26 21:43:03,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:03,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:03,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:03,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:43:03,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:04,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:04,279 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:04,279 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:04,285 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:43:04,392 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:43:04,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:43:04,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:04,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:04,625 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:04,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-26 21:43:04,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-26 21:43:04,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-26 21:43:04,627 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:04,627 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-09-26 21:43:05,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:05,217 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-26 21:43:05,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-26 21:43:05,217 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-09-26 21:43:05,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:05,218 INFO L225 Difference]: With dead ends: 81 [2018-09-26 21:43:05,218 INFO L226 Difference]: Without dead ends: 79 [2018-09-26 21:43:05,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:05,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-26 21:43:05,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-26 21:43:05,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-26 21:43:05,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-26 21:43:05,220 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-26 21:43:05,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:05,220 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-26 21:43:05,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-26 21:43:05,221 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-26 21:43:05,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-26 21:43:05,221 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:05,222 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-09-26 21:43:05,222 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:05,222 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:05,222 INFO L82 PathProgramCache]: Analyzing trace with hash -525788472, now seen corresponding path program 75 times [2018-09-26 21:43:05,222 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:05,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:05,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:05,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:43:05,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:05,745 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:05,745 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:05,752 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:43:05,900 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-26 21:43:05,900 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:43:05,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:06,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:06,187 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:06,187 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-26 21:43:06,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-26 21:43:06,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-26 21:43:06,188 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:06,188 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-09-26 21:43:07,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:07,313 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-26 21:43:07,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-26 21:43:07,313 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-09-26 21:43:07,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:07,314 INFO L225 Difference]: With dead ends: 82 [2018-09-26 21:43:07,314 INFO L226 Difference]: Without dead ends: 80 [2018-09-26 21:43:07,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:07,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-26 21:43:07,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-26 21:43:07,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-26 21:43:07,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-26 21:43:07,316 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-26 21:43:07,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:07,316 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-26 21:43:07,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-26 21:43:07,317 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-26 21:43:07,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-26 21:43:07,317 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:07,317 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-09-26 21:43:07,317 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:07,317 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:07,318 INFO L82 PathProgramCache]: Analyzing trace with hash 880424577, now seen corresponding path program 76 times [2018-09-26 21:43:07,318 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:07,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:07,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:07,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:43:07,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:07,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:07,883 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:07,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:07,891 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:43:08,000 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:43:08,001 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:43:08,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:08,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:08,228 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:08,228 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-26 21:43:08,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-26 21:43:08,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-26 21:43:08,230 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:08,230 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-09-26 21:43:08,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:08,965 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-26 21:43:08,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-26 21:43:08,965 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-09-26 21:43:08,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:08,966 INFO L225 Difference]: With dead ends: 83 [2018-09-26 21:43:08,966 INFO L226 Difference]: Without dead ends: 81 [2018-09-26 21:43:08,966 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:08,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-26 21:43:08,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-26 21:43:08,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-26 21:43:08,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-26 21:43:08,969 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-26 21:43:08,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:08,969 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-26 21:43:08,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-26 21:43:08,970 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-26 21:43:08,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-26 21:43:08,970 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:08,970 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-09-26 21:43:08,970 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:08,971 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:08,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1523356136, now seen corresponding path program 77 times [2018-09-26 21:43:08,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:08,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:08,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:08,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:43:08,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:08,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:09,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:09,840 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:09,840 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:09,848 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:43:10,000 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-26 21:43:10,000 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:43:10,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:10,236 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:10,237 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-26 21:43:10,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-26 21:43:10,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-26 21:43:10,238 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:10,238 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-09-26 21:43:10,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:10,887 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-26 21:43:10,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-26 21:43:10,888 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-09-26 21:43:10,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:10,888 INFO L225 Difference]: With dead ends: 84 [2018-09-26 21:43:10,888 INFO L226 Difference]: Without dead ends: 82 [2018-09-26 21:43:10,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:10,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-26 21:43:10,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-26 21:43:10,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-26 21:43:10,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-26 21:43:10,891 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-26 21:43:10,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:10,891 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-26 21:43:10,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-26 21:43:10,891 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-26 21:43:10,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-26 21:43:10,892 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:10,892 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-09-26 21:43:10,892 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:10,892 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:10,892 INFO L82 PathProgramCache]: Analyzing trace with hash -20602015, now seen corresponding path program 78 times [2018-09-26 21:43:10,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:10,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:10,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:10,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:43:10,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:10,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:11,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:11,475 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:11,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:11,482 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:43:11,629 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-26 21:43:11,630 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:43:11,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:11,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:11,880 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:11,881 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-26 21:43:11,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-26 21:43:11,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-26 21:43:11,882 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:11,883 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-09-26 21:43:12,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:12,334 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-26 21:43:12,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-26 21:43:12,334 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-09-26 21:43:12,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:12,335 INFO L225 Difference]: With dead ends: 85 [2018-09-26 21:43:12,335 INFO L226 Difference]: Without dead ends: 83 [2018-09-26 21:43:12,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:12,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-26 21:43:12,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-26 21:43:12,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-26 21:43:12,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-26 21:43:12,338 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-26 21:43:12,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:12,338 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-26 21:43:12,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-26 21:43:12,338 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-26 21:43:12,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-26 21:43:12,339 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:12,339 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-09-26 21:43:12,339 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:12,339 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:12,339 INFO L82 PathProgramCache]: Analyzing trace with hash -638664440, now seen corresponding path program 79 times [2018-09-26 21:43:12,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:12,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:12,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:12,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:43:12,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:12,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:13,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:13,111 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:13,111 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:13,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:43:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:13,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:13,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:13,481 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:13,481 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-26 21:43:13,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-26 21:43:13,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-26 21:43:13,482 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:13,482 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-09-26 21:43:14,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:14,313 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-09-26 21:43:14,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-26 21:43:14,313 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-09-26 21:43:14,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:14,314 INFO L225 Difference]: With dead ends: 86 [2018-09-26 21:43:14,314 INFO L226 Difference]: Without dead ends: 84 [2018-09-26 21:43:14,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:14,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-26 21:43:14,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-26 21:43:14,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-26 21:43:14,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-26 21:43:14,317 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-26 21:43:14,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:14,317 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-26 21:43:14,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-26 21:43:14,318 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-26 21:43:14,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-26 21:43:14,318 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:14,318 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-09-26 21:43:14,318 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:14,319 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:14,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1676236865, now seen corresponding path program 80 times [2018-09-26 21:43:14,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:14,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:14,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:14,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:43:14,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:14,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:14,964 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:14,964 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:14,972 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:43:15,088 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:43:15,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:43:15,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:15,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:15,336 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:15,336 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-26 21:43:15,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-26 21:43:15,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-26 21:43:15,338 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:15,338 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-09-26 21:43:16,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:16,048 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-26 21:43:16,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-26 21:43:16,048 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-09-26 21:43:16,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:16,048 INFO L225 Difference]: With dead ends: 87 [2018-09-26 21:43:16,049 INFO L226 Difference]: Without dead ends: 85 [2018-09-26 21:43:16,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:16,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-26 21:43:16,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-26 21:43:16,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-26 21:43:16,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-26 21:43:16,052 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-09-26 21:43:16,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:16,053 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-26 21:43:16,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-26 21:43:16,053 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-26 21:43:16,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-26 21:43:16,053 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:16,054 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-09-26 21:43:16,054 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:16,054 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:16,054 INFO L82 PathProgramCache]: Analyzing trace with hash 423733288, now seen corresponding path program 81 times [2018-09-26 21:43:16,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:16,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:16,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:16,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:43:16,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:16,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:16,669 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:16,669 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:16,676 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:43:16,835 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-26 21:43:16,835 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:43:16,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:17,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:17,210 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:17,211 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-26 21:43:17,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-26 21:43:17,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-26 21:43:17,212 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:17,213 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-09-26 21:43:17,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:17,795 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-09-26 21:43:17,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-26 21:43:17,796 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-09-26 21:43:17,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:17,796 INFO L225 Difference]: With dead ends: 88 [2018-09-26 21:43:17,796 INFO L226 Difference]: Without dead ends: 86 [2018-09-26 21:43:17,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:17,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-26 21:43:17,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-26 21:43:17,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-26 21:43:17,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-26 21:43:17,798 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-09-26 21:43:17,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:17,799 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-26 21:43:17,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-26 21:43:17,799 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-26 21:43:17,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-26 21:43:17,799 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:17,800 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-09-26 21:43:17,800 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:17,800 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:17,800 INFO L82 PathProgramCache]: Analyzing trace with hash 250828065, now seen corresponding path program 82 times [2018-09-26 21:43:17,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:17,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:17,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:17,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:43:17,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:17,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:18,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:18,413 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:18,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:18,422 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:43:18,539 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:43:18,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:43:18,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:18,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:18,789 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:18,789 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-26 21:43:18,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-26 21:43:18,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-26 21:43:18,791 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:18,791 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-09-26 21:43:19,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:19,661 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-26 21:43:19,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-26 21:43:19,661 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-09-26 21:43:19,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:19,662 INFO L225 Difference]: With dead ends: 89 [2018-09-26 21:43:19,662 INFO L226 Difference]: Without dead ends: 87 [2018-09-26 21:43:19,662 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:19,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-26 21:43:19,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-26 21:43:19,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-26 21:43:19,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-26 21:43:19,665 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-09-26 21:43:19,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:19,666 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-26 21:43:19,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-26 21:43:19,666 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-26 21:43:19,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-26 21:43:19,666 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:19,667 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-09-26 21:43:19,667 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:19,667 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:19,667 INFO L82 PathProgramCache]: Analyzing trace with hash -814266552, now seen corresponding path program 83 times [2018-09-26 21:43:19,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:19,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:19,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:19,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:43:19,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:20,268 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:20,269 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:20,276 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:43:20,444 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-26 21:43:20,444 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:43:20,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:20,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:20,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:20,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-26 21:43:20,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-26 21:43:20,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-26 21:43:20,709 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:20,709 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-09-26 21:43:21,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:21,443 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-09-26 21:43:21,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-26 21:43:21,443 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-09-26 21:43:21,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:21,444 INFO L225 Difference]: With dead ends: 90 [2018-09-26 21:43:21,444 INFO L226 Difference]: Without dead ends: 88 [2018-09-26 21:43:21,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:21,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-26 21:43:21,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-26 21:43:21,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-26 21:43:21,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-26 21:43:21,446 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-09-26 21:43:21,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:21,446 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-26 21:43:21,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-26 21:43:21,446 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-26 21:43:21,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-26 21:43:21,447 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:21,447 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-09-26 21:43:21,447 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:21,447 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:21,448 INFO L82 PathProgramCache]: Analyzing trace with hash 527538689, now seen corresponding path program 84 times [2018-09-26 21:43:21,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:21,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:21,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:21,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:43:21,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:21,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:22,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:22,404 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:22,404 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:22,413 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:43:22,580 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-26 21:43:22,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:43:22,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:22,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:22,851 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:22,851 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-26 21:43:22,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-26 21:43:22,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-26 21:43:22,853 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:22,853 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-09-26 21:43:23,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:23,447 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-26 21:43:23,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-26 21:43:23,447 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-09-26 21:43:23,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:23,447 INFO L225 Difference]: With dead ends: 91 [2018-09-26 21:43:23,447 INFO L226 Difference]: Without dead ends: 89 [2018-09-26 21:43:23,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:23,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-26 21:43:23,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-26 21:43:23,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-26 21:43:23,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-26 21:43:23,450 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-09-26 21:43:23,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:23,450 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-26 21:43:23,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-26 21:43:23,450 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-26 21:43:23,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-26 21:43:23,451 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:23,451 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-09-26 21:43:23,451 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:23,452 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:23,452 INFO L82 PathProgramCache]: Analyzing trace with hash -826171800, now seen corresponding path program 85 times [2018-09-26 21:43:23,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:23,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:23,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:23,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:43:23,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:24,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:24,490 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:24,490 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:24,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:43:24,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:24,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:24,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:24,886 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:24,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-26 21:43:24,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-26 21:43:24,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-26 21:43:24,888 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:24,888 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-09-26 21:43:25,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:25,420 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-09-26 21:43:25,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-26 21:43:25,420 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-09-26 21:43:25,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:25,421 INFO L225 Difference]: With dead ends: 92 [2018-09-26 21:43:25,421 INFO L226 Difference]: Without dead ends: 90 [2018-09-26 21:43:25,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:25,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-26 21:43:25,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-26 21:43:25,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-26 21:43:25,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-26 21:43:25,423 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-09-26 21:43:25,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:25,423 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-26 21:43:25,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-26 21:43:25,423 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-26 21:43:25,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-26 21:43:25,424 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:25,424 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-09-26 21:43:25,424 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:25,424 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:25,425 INFO L82 PathProgramCache]: Analyzing trace with hash 158476001, now seen corresponding path program 86 times [2018-09-26 21:43:25,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:25,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:25,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:25,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:43:25,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:25,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:26,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:26,115 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:26,115 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:26,123 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:43:26,248 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:43:26,248 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:43:26,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:26,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:26,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:26,513 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-26 21:43:26,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-26 21:43:26,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-26 21:43:26,515 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:26,515 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-09-26 21:43:27,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:27,057 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-26 21:43:27,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-26 21:43:27,057 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-09-26 21:43:27,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:27,058 INFO L225 Difference]: With dead ends: 93 [2018-09-26 21:43:27,058 INFO L226 Difference]: Without dead ends: 91 [2018-09-26 21:43:27,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:27,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-26 21:43:27,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-26 21:43:27,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-26 21:43:27,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-26 21:43:27,060 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-09-26 21:43:27,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:27,060 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-26 21:43:27,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-26 21:43:27,061 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-26 21:43:27,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-26 21:43:27,061 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:27,061 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-09-26 21:43:27,061 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:27,061 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:27,061 INFO L82 PathProgramCache]: Analyzing trace with hash 617786760, now seen corresponding path program 87 times [2018-09-26 21:43:27,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:27,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:27,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:27,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:43:27,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:27,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:27,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:27,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:27,723 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:27,730 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:43:27,910 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-26 21:43:27,911 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:43:27,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:28,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:28,196 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:28,196 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-26 21:43:28,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-26 21:43:28,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-26 21:43:28,198 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:28,198 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-09-26 21:43:28,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:28,754 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-09-26 21:43:28,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-26 21:43:28,754 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-09-26 21:43:28,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:28,755 INFO L225 Difference]: With dead ends: 94 [2018-09-26 21:43:28,755 INFO L226 Difference]: Without dead ends: 92 [2018-09-26 21:43:28,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:28,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-26 21:43:28,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-26 21:43:28,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-26 21:43:28,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-26 21:43:28,758 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-09-26 21:43:28,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:28,758 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-26 21:43:28,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-26 21:43:28,758 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-26 21:43:28,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-26 21:43:28,758 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:28,759 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-09-26 21:43:28,759 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:28,759 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:28,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1971518401, now seen corresponding path program 88 times [2018-09-26 21:43:28,759 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:28,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:28,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:28,760 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:43:28,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:28,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:29,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:29,501 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:29,501 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:29,508 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:43:29,637 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:43:29,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:43:29,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:29,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:29,929 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-26 21:43:29,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-26 21:43:29,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-26 21:43:29,930 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:29,930 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-09-26 21:43:30,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:30,513 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-26 21:43:30,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-26 21:43:30,514 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-09-26 21:43:30,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:30,514 INFO L225 Difference]: With dead ends: 95 [2018-09-26 21:43:30,514 INFO L226 Difference]: Without dead ends: 93 [2018-09-26 21:43:30,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:30,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-26 21:43:30,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-26 21:43:30,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-26 21:43:30,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-26 21:43:30,516 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-09-26 21:43:30,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:30,516 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-26 21:43:30,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-26 21:43:30,517 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-26 21:43:30,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-26 21:43:30,517 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:30,517 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-09-26 21:43:30,517 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:30,517 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:30,517 INFO L82 PathProgramCache]: Analyzing trace with hash 987526312, now seen corresponding path program 89 times [2018-09-26 21:43:30,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:30,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:30,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:30,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:43:30,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:31,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:31,234 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:31,241 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:43:31,420 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-26 21:43:31,420 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:43:31,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:31,725 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:31,726 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-26 21:43:31,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-26 21:43:31,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-26 21:43:31,727 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:31,727 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-09-26 21:43:32,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:32,315 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-09-26 21:43:32,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-26 21:43:32,316 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-09-26 21:43:32,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:32,316 INFO L225 Difference]: With dead ends: 96 [2018-09-26 21:43:32,316 INFO L226 Difference]: Without dead ends: 94 [2018-09-26 21:43:32,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:32,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-26 21:43:32,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-26 21:43:32,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-26 21:43:32,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-26 21:43:32,319 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-09-26 21:43:32,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:32,319 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-26 21:43:32,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-26 21:43:32,319 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-26 21:43:32,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-26 21:43:32,320 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:32,320 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-09-26 21:43:32,320 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:32,320 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:32,320 INFO L82 PathProgramCache]: Analyzing trace with hash 548542625, now seen corresponding path program 90 times [2018-09-26 21:43:32,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:32,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:32,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:32,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:43:32,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:32,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:33,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:33,046 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:33,046 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:33,054 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:43:33,241 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-26 21:43:33,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:43:33,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:33,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:33,539 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:33,539 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-26 21:43:33,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-26 21:43:33,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-26 21:43:33,541 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:33,541 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-09-26 21:43:34,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:34,265 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-26 21:43:34,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-26 21:43:34,266 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-09-26 21:43:34,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:34,266 INFO L225 Difference]: With dead ends: 97 [2018-09-26 21:43:34,267 INFO L226 Difference]: Without dead ends: 95 [2018-09-26 21:43:34,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:34,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-26 21:43:34,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-26 21:43:34,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-26 21:43:34,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-26 21:43:34,269 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-09-26 21:43:34,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:34,270 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-26 21:43:34,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-26 21:43:34,270 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-26 21:43:34,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-26 21:43:34,270 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:34,270 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-09-26 21:43:34,271 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:34,271 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:34,271 INFO L82 PathProgramCache]: Analyzing trace with hash -175049784, now seen corresponding path program 91 times [2018-09-26 21:43:34,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:34,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:34,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:34,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:43:34,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:34,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:35,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:35,197 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:35,198 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:35,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:43:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:35,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:35,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:35,638 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:35,639 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-26 21:43:35,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-26 21:43:35,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-26 21:43:35,640 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:35,640 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-09-26 21:43:36,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:36,511 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-09-26 21:43:36,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-26 21:43:36,511 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-09-26 21:43:36,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:36,512 INFO L225 Difference]: With dead ends: 98 [2018-09-26 21:43:36,512 INFO L226 Difference]: Without dead ends: 96 [2018-09-26 21:43:36,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:36,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-26 21:43:36,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-26 21:43:36,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-26 21:43:36,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-26 21:43:36,514 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-09-26 21:43:36,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:36,514 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-26 21:43:36,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-26 21:43:36,515 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-26 21:43:36,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-26 21:43:36,515 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:36,515 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-09-26 21:43:36,515 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:36,515 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:36,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1131577983, now seen corresponding path program 92 times [2018-09-26 21:43:36,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:36,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:36,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:36,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:43:36,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:37,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:37,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:37,257 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:37,264 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:43:37,396 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:43:37,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:43:37,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:37,776 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:37,776 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-26 21:43:37,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-26 21:43:37,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-26 21:43:37,778 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:37,778 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-09-26 21:43:38,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:38,377 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-26 21:43:38,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-26 21:43:38,378 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-09-26 21:43:38,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:38,378 INFO L225 Difference]: With dead ends: 99 [2018-09-26 21:43:38,378 INFO L226 Difference]: Without dead ends: 97 [2018-09-26 21:43:38,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:38,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-26 21:43:38,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-26 21:43:38,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-26 21:43:38,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-26 21:43:38,381 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-09-26 21:43:38,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:38,381 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-26 21:43:38,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-26 21:43:38,381 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-26 21:43:38,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-26 21:43:38,381 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:38,381 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-09-26 21:43:38,382 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:38,382 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:38,382 INFO L82 PathProgramCache]: Analyzing trace with hash -719181080, now seen corresponding path program 93 times [2018-09-26 21:43:38,382 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:38,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:38,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:38,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:43:38,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:38,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:39,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:39,136 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:39,136 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:39,143 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:43:39,339 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-26 21:43:39,340 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:43:39,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:39,692 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:39,692 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-26 21:43:39,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-26 21:43:39,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-26 21:43:39,694 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:39,694 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-09-26 21:43:40,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:40,546 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-09-26 21:43:40,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-26 21:43:40,547 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-09-26 21:43:40,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:40,547 INFO L225 Difference]: With dead ends: 100 [2018-09-26 21:43:40,547 INFO L226 Difference]: Without dead ends: 98 [2018-09-26 21:43:40,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:40,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-26 21:43:40,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-26 21:43:40,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-26 21:43:40,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-26 21:43:40,550 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-09-26 21:43:40,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:40,550 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-26 21:43:40,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-26 21:43:40,550 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-26 21:43:40,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-26 21:43:40,550 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:40,550 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-09-26 21:43:40,550 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:40,551 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:40,551 INFO L82 PathProgramCache]: Analyzing trace with hash -819778975, now seen corresponding path program 94 times [2018-09-26 21:43:40,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:40,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:40,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:40,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:43:40,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:41,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:41,616 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:41,616 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:41,625 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:43:41,765 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:43:41,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:43:41,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:42,116 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:42,117 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-26 21:43:42,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-26 21:43:42,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-26 21:43:42,119 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:42,119 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-09-26 21:43:42,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:42,778 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-26 21:43:42,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-26 21:43:42,778 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-09-26 21:43:42,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:42,779 INFO L225 Difference]: With dead ends: 101 [2018-09-26 21:43:42,779 INFO L226 Difference]: Without dead ends: 99 [2018-09-26 21:43:42,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:42,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-26 21:43:42,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-26 21:43:42,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-26 21:43:42,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-26 21:43:42,781 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-09-26 21:43:42,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:42,781 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-26 21:43:42,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-26 21:43:42,781 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-26 21:43:42,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-26 21:43:42,782 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:42,782 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-09-26 21:43:42,782 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:42,782 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:42,782 INFO L82 PathProgramCache]: Analyzing trace with hash 356653576, now seen corresponding path program 95 times [2018-09-26 21:43:42,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:42,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:42,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:42,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:43:42,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:43,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:43,626 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:43,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:43,634 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:43:43,841 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-26 21:43:43,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:43:43,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:44,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:44,182 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:44,183 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-26 21:43:44,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-26 21:43:44,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-26 21:43:44,184 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:44,185 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-09-26 21:43:45,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:45,143 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-09-26 21:43:45,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-26 21:43:45,144 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-09-26 21:43:45,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:45,144 INFO L225 Difference]: With dead ends: 102 [2018-09-26 21:43:45,144 INFO L226 Difference]: Without dead ends: 100 [2018-09-26 21:43:45,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:45,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-26 21:43:45,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-26 21:43:45,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-26 21:43:45,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-26 21:43:45,148 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-09-26 21:43:45,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:45,148 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-26 21:43:45,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-26 21:43:45,148 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-26 21:43:45,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-26 21:43:45,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:45,149 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-09-26 21:43:45,149 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:45,150 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:45,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1828643007, now seen corresponding path program 96 times [2018-09-26 21:43:45,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:45,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:45,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:45,151 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:43:45,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:45,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:45,967 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:45,968 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:45,976 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:43:46,183 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-26 21:43:46,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:43:46,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:46,505 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:46,505 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-26 21:43:46,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-26 21:43:46,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-26 21:43:46,507 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:46,507 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-09-26 21:43:47,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:47,201 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-26 21:43:47,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-26 21:43:47,201 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-09-26 21:43:47,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:47,202 INFO L225 Difference]: With dead ends: 103 [2018-09-26 21:43:47,202 INFO L226 Difference]: Without dead ends: 101 [2018-09-26 21:43:47,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:47,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-26 21:43:47,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-26 21:43:47,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-26 21:43:47,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-26 21:43:47,206 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-09-26 21:43:47,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:47,206 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-26 21:43:47,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-26 21:43:47,206 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-26 21:43:47,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-26 21:43:47,207 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:47,207 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-09-26 21:43:47,207 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:47,207 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:47,207 INFO L82 PathProgramCache]: Analyzing trace with hash -853360344, now seen corresponding path program 97 times [2018-09-26 21:43:47,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:47,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:47,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:47,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:43:47,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:47,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:48,102 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:48,102 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:48,109 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:43:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:48,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:48,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:48,585 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:48,585 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-26 21:43:48,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-26 21:43:48,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-26 21:43:48,588 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:48,588 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-09-26 21:43:49,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:49,318 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-26 21:43:49,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-26 21:43:49,319 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-09-26 21:43:49,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:49,319 INFO L225 Difference]: With dead ends: 104 [2018-09-26 21:43:49,319 INFO L226 Difference]: Without dead ends: 102 [2018-09-26 21:43:49,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:49,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-26 21:43:49,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-26 21:43:49,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-26 21:43:49,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-26 21:43:49,322 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-09-26 21:43:49,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:49,322 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-26 21:43:49,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-26 21:43:49,322 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-26 21:43:49,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-26 21:43:49,323 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:49,323 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-09-26 21:43:49,323 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:49,323 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:49,323 INFO L82 PathProgramCache]: Analyzing trace with hash -684368863, now seen corresponding path program 98 times [2018-09-26 21:43:49,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:49,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:49,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:49,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:43:49,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:50,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:50,362 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:50,362 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:50,368 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:43:50,511 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:43:50,511 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:43:50,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:50,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:50,826 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:50,826 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-26 21:43:50,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-26 21:43:50,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-26 21:43:50,828 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:50,828 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-09-26 21:43:51,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:51,798 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-26 21:43:51,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-26 21:43:51,799 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-09-26 21:43:51,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:51,799 INFO L225 Difference]: With dead ends: 105 [2018-09-26 21:43:51,799 INFO L226 Difference]: Without dead ends: 103 [2018-09-26 21:43:51,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:51,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-26 21:43:51,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-26 21:43:51,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-26 21:43:51,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-26 21:43:51,802 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-09-26 21:43:51,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:51,802 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-26 21:43:51,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-26 21:43:51,802 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-26 21:43:51,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-26 21:43:51,803 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:51,803 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-09-26 21:43:51,803 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:51,803 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:51,803 INFO L82 PathProgramCache]: Analyzing trace with hash 259399752, now seen corresponding path program 99 times [2018-09-26 21:43:51,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:51,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:51,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:51,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:43:51,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:52,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:52,632 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:52,632 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:52,639 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:43:52,864 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-26 21:43:52,864 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:43:52,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:53,198 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:53,198 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-26 21:43:53,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-26 21:43:53,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-26 21:43:53,201 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:53,201 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-09-26 21:43:54,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:54,210 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-09-26 21:43:54,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-26 21:43:54,211 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-09-26 21:43:54,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:54,211 INFO L225 Difference]: With dead ends: 106 [2018-09-26 21:43:54,212 INFO L226 Difference]: Without dead ends: 104 [2018-09-26 21:43:54,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:54,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-26 21:43:54,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-26 21:43:54,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-26 21:43:54,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-26 21:43:54,214 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-09-26 21:43:54,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:54,214 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-26 21:43:54,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-26 21:43:54,215 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-26 21:43:54,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-26 21:43:54,215 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:54,215 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-09-26 21:43:54,216 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:54,216 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:54,216 INFO L82 PathProgramCache]: Analyzing trace with hash -548544255, now seen corresponding path program 100 times [2018-09-26 21:43:54,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:54,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:54,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:54,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:43:54,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:54,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:55,147 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:55,147 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:55,154 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:43:55,303 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:43:55,303 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:43:55,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:55,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:55,637 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:55,637 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-26 21:43:55,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-26 21:43:55,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-26 21:43:55,639 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:55,639 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-09-26 21:43:56,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:56,684 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-26 21:43:56,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-26 21:43:56,685 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-09-26 21:43:56,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:56,685 INFO L225 Difference]: With dead ends: 107 [2018-09-26 21:43:56,686 INFO L226 Difference]: Without dead ends: 105 [2018-09-26 21:43:56,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:56,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-26 21:43:56,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-26 21:43:56,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-26 21:43:56,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-26 21:43:56,696 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-09-26 21:43:56,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:56,696 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-26 21:43:56,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-26 21:43:56,696 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-26 21:43:56,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-26 21:43:56,697 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:56,697 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-09-26 21:43:56,697 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:56,697 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:56,697 INFO L82 PathProgramCache]: Analyzing trace with hash 174995304, now seen corresponding path program 101 times [2018-09-26 21:43:56,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:56,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:56,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:56,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:43:56,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:56,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:43:57,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:57,643 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:43:57,643 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:43:57,651 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:43:57,870 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-26 21:43:57,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:43:57,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:43:58,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:43:58,207 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:43:58,207 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-26 21:43:58,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-26 21:43:58,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-26 21:43:58,210 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:43:58,210 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-09-26 21:43:59,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:43:59,270 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-09-26 21:43:59,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-26 21:43:59,270 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-09-26 21:43:59,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:43:59,271 INFO L225 Difference]: With dead ends: 108 [2018-09-26 21:43:59,271 INFO L226 Difference]: Without dead ends: 106 [2018-09-26 21:43:59,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:43:59,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-26 21:43:59,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-26 21:43:59,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-26 21:43:59,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-26 21:43:59,280 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-09-26 21:43:59,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:43:59,280 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-26 21:43:59,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-26 21:43:59,280 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-26 21:43:59,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-26 21:43:59,281 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:43:59,281 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-09-26 21:43:59,281 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:43:59,281 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:43:59,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1129885153, now seen corresponding path program 102 times [2018-09-26 21:43:59,282 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:43:59,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:43:59,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:59,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:43:59,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:43:59,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:00,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:00,334 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:00,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:00,341 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:44:00,556 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-09-26 21:44:00,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:00,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:00,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:00,909 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:00,909 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-26 21:44:00,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-26 21:44:00,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-26 21:44:00,911 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:00,912 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-09-26 21:44:01,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:01,949 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-26 21:44:01,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-26 21:44:01,949 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-09-26 21:44:01,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:01,950 INFO L225 Difference]: With dead ends: 109 [2018-09-26 21:44:01,950 INFO L226 Difference]: Without dead ends: 107 [2018-09-26 21:44:01,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:01,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-26 21:44:01,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-26 21:44:01,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-26 21:44:01,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-26 21:44:01,953 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-09-26 21:44:01,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:01,953 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-26 21:44:01,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-26 21:44:01,953 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-26 21:44:01,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-26 21:44:01,954 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:01,954 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-09-26 21:44:01,954 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:01,954 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:01,954 INFO L82 PathProgramCache]: Analyzing trace with hash 666699400, now seen corresponding path program 103 times [2018-09-26 21:44:01,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:01,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:01,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:01,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:01,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:02,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:02,968 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:02,968 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:02,976 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:44:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:03,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:03,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:03,610 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:03,610 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-26 21:44:03,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-26 21:44:03,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-26 21:44:03,612 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:03,612 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-09-26 21:44:04,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:04,374 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-09-26 21:44:04,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-26 21:44:04,375 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-09-26 21:44:04,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:04,375 INFO L225 Difference]: With dead ends: 110 [2018-09-26 21:44:04,375 INFO L226 Difference]: Without dead ends: 108 [2018-09-26 21:44:04,375 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:04,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-26 21:44:04,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-26 21:44:04,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-26 21:44:04,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-26 21:44:04,378 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-09-26 21:44:04,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:04,378 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-26 21:44:04,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-26 21:44:04,378 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-26 21:44:04,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-26 21:44:04,378 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:04,378 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-09-26 21:44:04,379 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:04,379 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:04,379 INFO L82 PathProgramCache]: Analyzing trace with hash -807157055, now seen corresponding path program 104 times [2018-09-26 21:44:04,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:04,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:04,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:04,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:44:04,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:05,362 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:05,362 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:05,370 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:44:05,528 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:44:05,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:05,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:05,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:05,961 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:05,962 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-26 21:44:05,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-26 21:44:05,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-26 21:44:05,964 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:05,964 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-09-26 21:44:06,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:06,872 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-26 21:44:06,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-26 21:44:06,872 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-09-26 21:44:06,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:06,872 INFO L225 Difference]: With dead ends: 111 [2018-09-26 21:44:06,872 INFO L226 Difference]: Without dead ends: 109 [2018-09-26 21:44:06,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:06,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-26 21:44:06,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-26 21:44:06,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-26 21:44:06,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-26 21:44:06,875 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-09-26 21:44:06,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:06,876 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-26 21:44:06,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-26 21:44:06,876 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-26 21:44:06,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-26 21:44:06,876 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:06,876 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-09-26 21:44:06,877 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:06,877 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:06,877 INFO L82 PathProgramCache]: Analyzing trace with hash 747933096, now seen corresponding path program 105 times [2018-09-26 21:44:06,877 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:06,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:06,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:06,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:06,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:07,852 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:07,852 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:07,862 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:44:08,102 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-26 21:44:08,102 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:08,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:08,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:08,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:08,472 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-26 21:44:08,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-26 21:44:08,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-26 21:44:08,475 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:08,475 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-09-26 21:44:09,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:09,665 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-09-26 21:44:09,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-26 21:44:09,666 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-09-26 21:44:09,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:09,666 INFO L225 Difference]: With dead ends: 112 [2018-09-26 21:44:09,666 INFO L226 Difference]: Without dead ends: 110 [2018-09-26 21:44:09,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:09,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-26 21:44:09,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-26 21:44:09,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-26 21:44:09,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-26 21:44:09,670 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-09-26 21:44:09,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:09,670 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-26 21:44:09,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-26 21:44:09,670 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-26 21:44:09,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-26 21:44:09,671 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:09,671 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-09-26 21:44:09,671 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:09,671 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:09,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1711087521, now seen corresponding path program 106 times [2018-09-26 21:44:09,671 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:09,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:09,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:09,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:09,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:10,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:10,833 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:10,833 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:10,841 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:44:10,995 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:44:10,995 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:11,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:11,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:11,357 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:11,357 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-26 21:44:11,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-26 21:44:11,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-26 21:44:11,359 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:11,359 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-09-26 21:44:12,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:12,432 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-26 21:44:12,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-26 21:44:12,432 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-09-26 21:44:12,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:12,433 INFO L225 Difference]: With dead ends: 113 [2018-09-26 21:44:12,433 INFO L226 Difference]: Without dead ends: 111 [2018-09-26 21:44:12,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:12,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-26 21:44:12,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-26 21:44:12,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-26 21:44:12,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-26 21:44:12,436 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-09-26 21:44:12,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:12,436 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-26 21:44:12,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-26 21:44:12,437 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-26 21:44:12,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-26 21:44:12,437 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:12,437 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-09-26 21:44:12,438 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:12,438 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:12,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1504103624, now seen corresponding path program 107 times [2018-09-26 21:44:12,438 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:12,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:12,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:12,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:12,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:12,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:13,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:13,445 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:13,445 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:13,452 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:44:13,701 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-26 21:44:13,701 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:13,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:14,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:14,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:14,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-26 21:44:14,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-26 21:44:14,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-26 21:44:14,069 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:14,069 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-09-26 21:44:15,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:15,293 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-09-26 21:44:15,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-26 21:44:15,293 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-09-26 21:44:15,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:15,293 INFO L225 Difference]: With dead ends: 114 [2018-09-26 21:44:15,294 INFO L226 Difference]: Without dead ends: 112 [2018-09-26 21:44:15,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:15,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-26 21:44:15,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-26 21:44:15,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-26 21:44:15,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-26 21:44:15,296 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-09-26 21:44:15,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:15,296 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-26 21:44:15,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-26 21:44:15,296 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-26 21:44:15,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-26 21:44:15,297 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:15,297 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-09-26 21:44:15,297 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:15,297 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:15,298 INFO L82 PathProgramCache]: Analyzing trace with hash -617429887, now seen corresponding path program 108 times [2018-09-26 21:44:15,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:15,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:15,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:15,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:15,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:16,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:16,512 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:16,512 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:16,519 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:44:16,750 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-26 21:44:16,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:16,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:17,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:17,122 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:17,122 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-26 21:44:17,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-26 21:44:17,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-26 21:44:17,125 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:17,125 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-09-26 21:44:18,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:18,053 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-26 21:44:18,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-26 21:44:18,054 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-09-26 21:44:18,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:18,054 INFO L225 Difference]: With dead ends: 115 [2018-09-26 21:44:18,054 INFO L226 Difference]: Without dead ends: 113 [2018-09-26 21:44:18,054 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:18,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-26 21:44:18,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-26 21:44:18,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-26 21:44:18,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-26 21:44:18,056 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-09-26 21:44:18,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:18,057 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-26 21:44:18,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-26 21:44:18,057 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-26 21:44:18,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-26 21:44:18,057 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:18,057 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-09-26 21:44:18,057 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:18,058 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:18,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1960459288, now seen corresponding path program 109 times [2018-09-26 21:44:18,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:18,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:18,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:18,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:18,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:19,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:19,090 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:19,090 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:19,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:44:19,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:19,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:19,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:19,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:19,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-26 21:44:19,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-26 21:44:19,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-26 21:44:19,663 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:19,663 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-09-26 21:44:21,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:21,063 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-09-26 21:44:21,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-26 21:44:21,063 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-09-26 21:44:21,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:21,063 INFO L225 Difference]: With dead ends: 116 [2018-09-26 21:44:21,063 INFO L226 Difference]: Without dead ends: 114 [2018-09-26 21:44:21,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:21,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-26 21:44:21,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-26 21:44:21,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-26 21:44:21,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-26 21:44:21,066 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-09-26 21:44:21,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:21,066 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-26 21:44:21,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-26 21:44:21,067 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-26 21:44:21,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-26 21:44:21,067 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:21,067 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-09-26 21:44:21,067 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:21,068 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:21,068 INFO L82 PathProgramCache]: Analyzing trace with hash -644697759, now seen corresponding path program 110 times [2018-09-26 21:44:21,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:21,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:21,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:21,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:44:21,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:21,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:22,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:22,098 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:22,098 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:22,105 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:44:22,266 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:44:22,267 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:22,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:22,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:22,688 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:22,688 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-09-26 21:44:22,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-26 21:44:22,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-26 21:44:22,691 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:22,691 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 113 states. [2018-09-26 21:44:23,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:23,983 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-26 21:44:23,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-26 21:44:23,983 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 113 [2018-09-26 21:44:23,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:23,984 INFO L225 Difference]: With dead ends: 117 [2018-09-26 21:44:23,984 INFO L226 Difference]: Without dead ends: 115 [2018-09-26 21:44:23,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:23,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-26 21:44:23,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-26 21:44:23,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-26 21:44:23,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-26 21:44:23,987 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-09-26 21:44:23,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:23,987 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-26 21:44:23,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-26 21:44:23,988 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-26 21:44:23,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-26 21:44:23,989 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:23,989 INFO L375 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-09-26 21:44:23,989 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:23,989 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:23,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1489203976, now seen corresponding path program 111 times [2018-09-26 21:44:23,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:23,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:23,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:23,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:23,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:24,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:25,083 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:25,083 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:25,091 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:44:25,385 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-09-26 21:44:25,385 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:25,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:25,841 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:25,841 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 113 [2018-09-26 21:44:25,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-26 21:44:25,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-26 21:44:25,844 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:25,844 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 114 states. [2018-09-26 21:44:27,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:27,152 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-09-26 21:44:27,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-26 21:44:27,153 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 114 [2018-09-26 21:44:27,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:27,153 INFO L225 Difference]: With dead ends: 118 [2018-09-26 21:44:27,153 INFO L226 Difference]: Without dead ends: 116 [2018-09-26 21:44:27,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:27,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-26 21:44:27,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-26 21:44:27,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-26 21:44:27,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-26 21:44:27,156 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114 [2018-09-26 21:44:27,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:27,156 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-26 21:44:27,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-26 21:44:27,156 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-26 21:44:27,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-26 21:44:27,157 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:27,157 INFO L375 BasicCegarLoop]: trace histogram [112, 1, 1, 1] [2018-09-26 21:44:27,158 INFO L423 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:27,158 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:27,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1079318975, now seen corresponding path program 112 times [2018-09-26 21:44:27,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:27,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:27,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:27,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:27,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:28,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:28,260 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:28,260 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:28,267 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:44:28,440 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:44:28,440 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:28,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:29,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:29,033 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:29,033 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 114 [2018-09-26 21:44:29,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-09-26 21:44:29,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-09-26 21:44:29,037 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:29,037 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 115 states. [2018-09-26 21:44:30,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:30,244 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-26 21:44:30,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-09-26 21:44:30,244 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 115 [2018-09-26 21:44:30,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:30,245 INFO L225 Difference]: With dead ends: 119 [2018-09-26 21:44:30,245 INFO L226 Difference]: Without dead ends: 117 [2018-09-26 21:44:30,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:30,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-26 21:44:30,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-26 21:44:30,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-26 21:44:30,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-26 21:44:30,247 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 115 [2018-09-26 21:44:30,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:30,247 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-26 21:44:30,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-09-26 21:44:30,247 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-26 21:44:30,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-26 21:44:30,248 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:30,248 INFO L375 BasicCegarLoop]: trace histogram [113, 1, 1, 1] [2018-09-26 21:44:30,248 INFO L423 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:30,248 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:30,248 INFO L82 PathProgramCache]: Analyzing trace with hash 900848168, now seen corresponding path program 113 times [2018-09-26 21:44:30,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:30,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:30,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:30,249 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:30,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:31,474 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:31,474 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:31,482 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:44:31,765 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2018-09-26 21:44:31,765 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:31,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:32,183 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:32,183 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 115 [2018-09-26 21:44:32,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-26 21:44:32,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-26 21:44:32,186 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:32,186 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 116 states. [2018-09-26 21:44:33,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:33,364 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2018-09-26 21:44:33,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-09-26 21:44:33,365 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 116 [2018-09-26 21:44:33,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:33,365 INFO L225 Difference]: With dead ends: 120 [2018-09-26 21:44:33,365 INFO L226 Difference]: Without dead ends: 118 [2018-09-26 21:44:33,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:33,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-26 21:44:33,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-26 21:44:33,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-26 21:44:33,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-09-26 21:44:33,368 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 116 [2018-09-26 21:44:33,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:33,368 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-09-26 21:44:33,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-26 21:44:33,368 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-09-26 21:44:33,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-26 21:44:33,369 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:33,369 INFO L375 BasicCegarLoop]: trace histogram [114, 1, 1, 1] [2018-09-26 21:44:33,369 INFO L423 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:33,369 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:33,369 INFO L82 PathProgramCache]: Analyzing trace with hash -2138479839, now seen corresponding path program 114 times [2018-09-26 21:44:33,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:33,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:33,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:33,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:33,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:33,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:34,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:34,543 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:34,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:34,552 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:44:34,813 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2018-09-26 21:44:34,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:34,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:35,227 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:35,228 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 116 [2018-09-26 21:44:35,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-09-26 21:44:35,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-09-26 21:44:35,230 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:35,230 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 117 states. [2018-09-26 21:44:36,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:36,440 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-26 21:44:36,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-09-26 21:44:36,440 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 117 [2018-09-26 21:44:36,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:36,441 INFO L225 Difference]: With dead ends: 121 [2018-09-26 21:44:36,441 INFO L226 Difference]: Without dead ends: 119 [2018-09-26 21:44:36,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:36,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-26 21:44:36,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-26 21:44:36,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-26 21:44:36,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-26 21:44:36,444 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 117 [2018-09-26 21:44:36,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:36,445 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-26 21:44:36,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-09-26 21:44:36,445 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-26 21:44:36,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-26 21:44:36,446 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:36,446 INFO L375 BasicCegarLoop]: trace histogram [115, 1, 1, 1] [2018-09-26 21:44:36,446 INFO L423 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:36,446 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:36,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1868367544, now seen corresponding path program 115 times [2018-09-26 21:44:36,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:36,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:36,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:36,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:36,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:36,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:37,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:37,604 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:37,604 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:37,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:44:37,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:37,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:38,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:38,213 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:38,214 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 117 [2018-09-26 21:44:38,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-26 21:44:38,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-26 21:44:38,216 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:38,217 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 118 states. [2018-09-26 21:44:39,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:39,485 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-09-26 21:44:39,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-09-26 21:44:39,486 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 118 [2018-09-26 21:44:39,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:39,486 INFO L225 Difference]: With dead ends: 122 [2018-09-26 21:44:39,486 INFO L226 Difference]: Without dead ends: 120 [2018-09-26 21:44:39,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:39,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-26 21:44:39,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-26 21:44:39,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-26 21:44:39,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-09-26 21:44:39,488 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 118 [2018-09-26 21:44:39,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:39,489 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-09-26 21:44:39,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-26 21:44:39,489 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-09-26 21:44:39,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-26 21:44:39,489 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:39,489 INFO L375 BasicCegarLoop]: trace histogram [116, 1, 1, 1] [2018-09-26 21:44:39,489 INFO L423 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:39,489 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:39,490 INFO L82 PathProgramCache]: Analyzing trace with hash -2084820991, now seen corresponding path program 116 times [2018-09-26 21:44:39,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:39,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:39,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:39,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:44:39,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:40,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:40,693 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:40,693 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:40,702 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:44:40,879 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:44:40,879 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:40,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:41,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:41,355 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:41,356 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118] total 118 [2018-09-26 21:44:41,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-26 21:44:41,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-26 21:44:41,358 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:41,358 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 119 states. [2018-09-26 21:44:42,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:42,388 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-26 21:44:42,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-26 21:44:42,388 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 119 [2018-09-26 21:44:42,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:42,389 INFO L225 Difference]: With dead ends: 123 [2018-09-26 21:44:42,389 INFO L226 Difference]: Without dead ends: 121 [2018-09-26 21:44:42,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:42,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-26 21:44:42,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-26 21:44:42,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-26 21:44:42,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-09-26 21:44:42,391 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 119 [2018-09-26 21:44:42,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:42,392 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-09-26 21:44:42,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-26 21:44:42,392 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-09-26 21:44:42,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-26 21:44:42,392 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:42,392 INFO L375 BasicCegarLoop]: trace histogram [117, 1, 1, 1] [2018-09-26 21:44:42,392 INFO L423 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:42,392 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:42,392 INFO L82 PathProgramCache]: Analyzing trace with hash -204943256, now seen corresponding path program 117 times [2018-09-26 21:44:42,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:42,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:42,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:42,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:42,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:43,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:43,566 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:43,567 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:43,574 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:44:43,848 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2018-09-26 21:44:43,848 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:43,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:44,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:44,284 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:44,285 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 119 [2018-09-26 21:44:44,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-26 21:44:44,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-26 21:44:44,287 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:44,288 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 120 states. [2018-09-26 21:44:45,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:45,471 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-09-26 21:44:45,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-09-26 21:44:45,471 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 120 [2018-09-26 21:44:45,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:45,472 INFO L225 Difference]: With dead ends: 124 [2018-09-26 21:44:45,472 INFO L226 Difference]: Without dead ends: 122 [2018-09-26 21:44:45,472 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:45,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-26 21:44:45,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-26 21:44:45,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-26 21:44:45,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-09-26 21:44:45,474 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 120 [2018-09-26 21:44:45,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:45,475 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-09-26 21:44:45,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-26 21:44:45,475 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-09-26 21:44:45,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-26 21:44:45,475 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:45,475 INFO L375 BasicCegarLoop]: trace histogram [118, 1, 1, 1] [2018-09-26 21:44:45,475 INFO L423 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:45,475 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:45,475 INFO L82 PathProgramCache]: Analyzing trace with hash -2058275615, now seen corresponding path program 118 times [2018-09-26 21:44:45,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:45,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:45,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:45,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:45,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:45,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:46,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:46,720 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:46,720 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:46,729 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:44:46,909 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:44:46,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:46,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:47,392 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:47,392 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 120 [2018-09-26 21:44:47,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-09-26 21:44:47,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-09-26 21:44:47,395 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:47,395 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 121 states. [2018-09-26 21:44:48,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:48,652 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-26 21:44:48,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-26 21:44:48,652 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 121 [2018-09-26 21:44:48,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:48,653 INFO L225 Difference]: With dead ends: 125 [2018-09-26 21:44:48,653 INFO L226 Difference]: Without dead ends: 123 [2018-09-26 21:44:48,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:48,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-26 21:44:48,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-26 21:44:48,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-26 21:44:48,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-26 21:44:48,656 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 121 [2018-09-26 21:44:48,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:48,656 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-26 21:44:48,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-09-26 21:44:48,656 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-26 21:44:48,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-26 21:44:48,657 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:48,657 INFO L375 BasicCegarLoop]: trace histogram [119, 1, 1, 1] [2018-09-26 21:44:48,657 INFO L423 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:48,657 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:48,657 INFO L82 PathProgramCache]: Analyzing trace with hash 617963400, now seen corresponding path program 119 times [2018-09-26 21:44:48,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:48,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:48,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:48,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:48,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:48,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:49,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:49,866 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:49,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:49,873 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:44:50,154 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-09-26 21:44:50,155 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:50,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:50,586 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:50,586 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 121 [2018-09-26 21:44:50,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-26 21:44:50,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-26 21:44:50,589 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:50,589 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 122 states. [2018-09-26 21:44:51,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:51,693 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2018-09-26 21:44:51,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-09-26 21:44:51,693 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 122 [2018-09-26 21:44:51,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:51,694 INFO L225 Difference]: With dead ends: 126 [2018-09-26 21:44:51,694 INFO L226 Difference]: Without dead ends: 124 [2018-09-26 21:44:51,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:51,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-26 21:44:51,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-26 21:44:51,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-26 21:44:51,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-09-26 21:44:51,697 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 122 [2018-09-26 21:44:51,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:51,697 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-09-26 21:44:51,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-26 21:44:51,697 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-09-26 21:44:51,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-26 21:44:51,698 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:51,698 INFO L375 BasicCegarLoop]: trace histogram [120, 1, 1, 1] [2018-09-26 21:44:51,698 INFO L423 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:51,698 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:51,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1976994241, now seen corresponding path program 120 times [2018-09-26 21:44:51,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:51,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:51,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:51,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:51,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:51,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:52,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:52,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:52,902 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:52,909 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:44:53,181 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-26 21:44:53,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:53,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:53,620 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:53,620 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122] total 122 [2018-09-26 21:44:53,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-09-26 21:44:53,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-09-26 21:44:53,623 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:53,623 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 123 states. [2018-09-26 21:44:55,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:55,093 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-26 21:44:55,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-09-26 21:44:55,093 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 123 [2018-09-26 21:44:55,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:55,094 INFO L225 Difference]: With dead ends: 127 [2018-09-26 21:44:55,094 INFO L226 Difference]: Without dead ends: 125 [2018-09-26 21:44:55,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:55,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-26 21:44:55,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-26 21:44:55,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-26 21:44:55,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-09-26 21:44:55,096 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 123 [2018-09-26 21:44:55,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:55,096 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-09-26 21:44:55,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-09-26 21:44:55,096 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-09-26 21:44:55,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-26 21:44:55,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:55,097 INFO L375 BasicCegarLoop]: trace histogram [121, 1, 1, 1] [2018-09-26 21:44:55,097 INFO L423 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:55,097 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:55,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1157277352, now seen corresponding path program 121 times [2018-09-26 21:44:55,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:55,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:55,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:55,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:55,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:55,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:56,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:56,318 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:56,318 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:56,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:44:56,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:56,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:56,938 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:56,959 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:56,959 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 123 [2018-09-26 21:44:56,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-26 21:44:56,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-26 21:44:56,962 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:56,963 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 124 states. [2018-09-26 21:44:58,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:58,344 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2018-09-26 21:44:58,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-09-26 21:44:58,345 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 124 [2018-09-26 21:44:58,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:58,345 INFO L225 Difference]: With dead ends: 128 [2018-09-26 21:44:58,345 INFO L226 Difference]: Without dead ends: 126 [2018-09-26 21:44:58,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:58,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-26 21:44:58,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-26 21:44:58,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-26 21:44:58,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-09-26 21:44:58,348 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 124 [2018-09-26 21:44:58,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:58,348 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-09-26 21:44:58,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-26 21:44:58,349 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-09-26 21:44:58,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-26 21:44:58,349 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:58,349 INFO L375 BasicCegarLoop]: trace histogram [122, 1, 1, 1] [2018-09-26 21:44:58,349 INFO L423 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:58,349 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:58,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1515857569, now seen corresponding path program 122 times [2018-09-26 21:44:58,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:58,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:58,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:58,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:44:58,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:59,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:59,598 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:59,598 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:59,606 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:44:59,795 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:44:59,795 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:59,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:00,255 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:00,255 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 124 [2018-09-26 21:45:00,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-26 21:45:00,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-26 21:45:00,258 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:00,258 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 125 states. [2018-09-26 21:45:01,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:01,922 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-26 21:45:01,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-09-26 21:45:01,922 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 125 [2018-09-26 21:45:01,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:01,922 INFO L225 Difference]: With dead ends: 129 [2018-09-26 21:45:01,922 INFO L226 Difference]: Without dead ends: 127 [2018-09-26 21:45:01,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:01,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-26 21:45:01,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-26 21:45:01,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-26 21:45:01,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-26 21:45:01,925 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 125 [2018-09-26 21:45:01,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:01,925 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-26 21:45:01,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-26 21:45:01,925 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-26 21:45:01,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-26 21:45:01,925 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:01,926 INFO L375 BasicCegarLoop]: trace histogram [123, 1, 1, 1] [2018-09-26 21:45:01,926 INFO L423 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:01,926 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:01,926 INFO L82 PathProgramCache]: Analyzing trace with hash -253057592, now seen corresponding path program 123 times [2018-09-26 21:45:01,926 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:01,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:01,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:01,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:01,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:03,166 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:03,166 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:03,174 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:45:03,466 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2018-09-26 21:45:03,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:03,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:03,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:03,938 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:03,938 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125] total 125 [2018-09-26 21:45:03,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-26 21:45:03,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-26 21:45:03,941 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:03,941 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 126 states. [2018-09-26 21:45:05,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:05,419 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-09-26 21:45:05,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-09-26 21:45:05,419 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 126 [2018-09-26 21:45:05,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:05,419 INFO L225 Difference]: With dead ends: 130 [2018-09-26 21:45:05,419 INFO L226 Difference]: Without dead ends: 128 [2018-09-26 21:45:05,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:05,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-26 21:45:05,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-26 21:45:05,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-26 21:45:05,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-09-26 21:45:05,422 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 126 [2018-09-26 21:45:05,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:05,422 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-09-26 21:45:05,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-26 21:45:05,422 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-09-26 21:45:05,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-26 21:45:05,422 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:05,422 INFO L375 BasicCegarLoop]: trace histogram [124, 1, 1, 1] [2018-09-26 21:45:05,423 INFO L423 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:05,423 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:05,423 INFO L82 PathProgramCache]: Analyzing trace with hash 745147265, now seen corresponding path program 124 times [2018-09-26 21:45:05,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:05,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:05,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:05,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:05,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:05,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:06,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:06,686 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:06,686 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:06,694 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:45:06,888 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:45:06,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:06,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:07,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:07,378 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:07,378 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126] total 126 [2018-09-26 21:45:07,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-09-26 21:45:07,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-09-26 21:45:07,381 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:07,381 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 127 states. [2018-09-26 21:45:08,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:08,772 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-26 21:45:08,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-09-26 21:45:08,773 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 127 [2018-09-26 21:45:08,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:08,773 INFO L225 Difference]: With dead ends: 131 [2018-09-26 21:45:08,773 INFO L226 Difference]: Without dead ends: 129 [2018-09-26 21:45:08,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:08,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-26 21:45:08,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-26 21:45:08,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-26 21:45:08,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-09-26 21:45:08,776 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 127 [2018-09-26 21:45:08,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:08,776 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-09-26 21:45:08,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-09-26 21:45:08,776 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-09-26 21:45:08,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-26 21:45:08,777 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:08,777 INFO L375 BasicCegarLoop]: trace histogram [125, 1, 1, 1] [2018-09-26 21:45:08,777 INFO L423 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:08,777 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:08,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1624726760, now seen corresponding path program 125 times [2018-09-26 21:45:08,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:08,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:08,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:08,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:08,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:08,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:10,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:10,049 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:10,049 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:10,057 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:45:10,384 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2018-09-26 21:45:10,384 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:10,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:10,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:10,863 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:10,863 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127] total 127 [2018-09-26 21:45:10,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-26 21:45:10,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-26 21:45:10,866 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:10,867 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 128 states. [2018-09-26 21:45:12,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:12,223 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2018-09-26 21:45:12,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-09-26 21:45:12,224 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 128 [2018-09-26 21:45:12,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:12,224 INFO L225 Difference]: With dead ends: 132 [2018-09-26 21:45:12,224 INFO L226 Difference]: Without dead ends: 130 [2018-09-26 21:45:12,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:12,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-26 21:45:12,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-26 21:45:12,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-26 21:45:12,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-09-26 21:45:12,227 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 128 [2018-09-26 21:45:12,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:12,227 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-09-26 21:45:12,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-26 21:45:12,227 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-09-26 21:45:12,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-26 21:45:12,227 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:12,228 INFO L375 BasicCegarLoop]: trace histogram [126, 1, 1, 1] [2018-09-26 21:45:12,228 INFO L423 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:12,228 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:12,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1173079967, now seen corresponding path program 126 times [2018-09-26 21:45:12,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:12,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:12,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:12,229 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:12,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:13,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:13,554 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:13,555 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:13,562 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:45:13,853 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2018-09-26 21:45:13,853 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:13,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:14,309 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:14,309 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128] total 128 [2018-09-26 21:45:14,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-09-26 21:45:14,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-09-26 21:45:14,312 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:14,312 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 129 states. [2018-09-26 21:45:15,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:15,677 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-26 21:45:15,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-09-26 21:45:15,678 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 129 [2018-09-26 21:45:15,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:15,678 INFO L225 Difference]: With dead ends: 133 [2018-09-26 21:45:15,678 INFO L226 Difference]: Without dead ends: 131 [2018-09-26 21:45:15,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:15,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-26 21:45:15,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-26 21:45:15,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-26 21:45:15,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-26 21:45:15,681 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 129 [2018-09-26 21:45:15,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:15,681 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-26 21:45:15,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-09-26 21:45:15,682 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-26 21:45:15,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-26 21:45:15,682 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:15,682 INFO L375 BasicCegarLoop]: trace histogram [127, 1, 1, 1] [2018-09-26 21:45:15,682 INFO L423 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:15,683 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:15,683 INFO L82 PathProgramCache]: Analyzing trace with hash -2005742584, now seen corresponding path program 127 times [2018-09-26 21:45:15,683 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:15,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:15,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:15,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:15,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:15,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:17,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:17,031 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:17,031 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:17,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:17,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:17,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:17,714 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:17,714 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129] total 129 [2018-09-26 21:45:17,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-26 21:45:17,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-26 21:45:17,717 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:17,717 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 130 states. [2018-09-26 21:45:19,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:19,206 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-09-26 21:45:19,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-09-26 21:45:19,207 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 130 [2018-09-26 21:45:19,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:19,207 INFO L225 Difference]: With dead ends: 134 [2018-09-26 21:45:19,207 INFO L226 Difference]: Without dead ends: 132 [2018-09-26 21:45:19,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:19,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-09-26 21:45:19,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-09-26 21:45:19,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-09-26 21:45:19,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-09-26 21:45:19,211 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 130 [2018-09-26 21:45:19,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:19,211 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-09-26 21:45:19,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-26 21:45:19,211 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-09-26 21:45:19,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-26 21:45:19,211 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:19,212 INFO L375 BasicCegarLoop]: trace histogram [128, 1, 1, 1] [2018-09-26 21:45:19,212 INFO L423 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:19,212 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:19,212 INFO L82 PathProgramCache]: Analyzing trace with hash -2048479935, now seen corresponding path program 128 times [2018-09-26 21:45:19,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:19,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:19,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:19,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:19,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:19,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:20,572 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:20,572 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:20,583 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:45:20,766 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:45:20,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:20,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:21,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:21,268 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:21,268 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130] total 130 [2018-09-26 21:45:21,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-09-26 21:45:21,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-09-26 21:45:21,272 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:21,272 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 131 states. [2018-09-26 21:45:22,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:22,777 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-26 21:45:22,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-26 21:45:22,778 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 131 [2018-09-26 21:45:22,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:22,778 INFO L225 Difference]: With dead ends: 135 [2018-09-26 21:45:22,778 INFO L226 Difference]: Without dead ends: 133 [2018-09-26 21:45:22,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:22,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-26 21:45:22,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-26 21:45:22,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-26 21:45:22,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-09-26 21:45:22,781 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 131 [2018-09-26 21:45:22,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:22,782 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-09-26 21:45:22,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-09-26 21:45:22,782 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-09-26 21:45:22,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-26 21:45:22,782 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:22,783 INFO L375 BasicCegarLoop]: trace histogram [129, 1, 1, 1] [2018-09-26 21:45:22,783 INFO L423 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:22,783 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:22,783 INFO L82 PathProgramCache]: Analyzing trace with hash 921629480, now seen corresponding path program 129 times [2018-09-26 21:45:22,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:22,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:22,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:22,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:22,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:22,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:24,182 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:24,182 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:24,188 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:45:24,508 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2018-09-26 21:45:24,509 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:24,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:24,981 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:24,981 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131] total 131 [2018-09-26 21:45:24,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-26 21:45:24,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-26 21:45:24,984 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:24,984 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 132 states. [2018-09-26 21:45:26,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:26,574 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-09-26 21:45:26,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-09-26 21:45:26,574 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 132 [2018-09-26 21:45:26,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:26,574 INFO L225 Difference]: With dead ends: 136 [2018-09-26 21:45:26,574 INFO L226 Difference]: Without dead ends: 134 [2018-09-26 21:45:26,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:26,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-26 21:45:26,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-09-26 21:45:26,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-26 21:45:26,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-09-26 21:45:26,578 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 132 [2018-09-26 21:45:26,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:26,578 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-09-26 21:45:26,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-26 21:45:26,578 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-09-26 21:45:26,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-26 21:45:26,579 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:26,579 INFO L375 BasicCegarLoop]: trace histogram [130, 1, 1, 1] [2018-09-26 21:45:26,579 INFO L423 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:26,579 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:26,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1494259167, now seen corresponding path program 130 times [2018-09-26 21:45:26,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:26,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:26,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:26,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:26,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:26,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:28,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:28,086 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:28,086 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:28,093 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:45:28,282 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:45:28,283 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:28,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:28,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:28,783 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:28,783 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 132] total 132 [2018-09-26 21:45:28,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 133 states [2018-09-26 21:45:28,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2018-09-26 21:45:28,786 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:28,786 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 133 states. [2018-09-26 21:45:30,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:30,299 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-26 21:45:30,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-09-26 21:45:30,300 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 133 [2018-09-26 21:45:30,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:30,300 INFO L225 Difference]: With dead ends: 137 [2018-09-26 21:45:30,300 INFO L226 Difference]: Without dead ends: 135 [2018-09-26 21:45:30,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:30,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-26 21:45:30,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-26 21:45:30,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-26 21:45:30,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-26 21:45:30,303 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 133 [2018-09-26 21:45:30,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:30,303 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-26 21:45:30,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 133 states. [2018-09-26 21:45:30,304 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-26 21:45:30,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-26 21:45:30,304 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:30,304 INFO L375 BasicCegarLoop]: trace histogram [131, 1, 1, 1] [2018-09-26 21:45:30,304 INFO L423 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:30,305 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:30,305 INFO L82 PathProgramCache]: Analyzing trace with hash 922604104, now seen corresponding path program 131 times [2018-09-26 21:45:30,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:30,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:30,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:30,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:30,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:31,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:31,715 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:31,716 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:31,724 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:45:32,045 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-09-26 21:45:32,045 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:32,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:32,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:32,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:32,622 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133] total 133 [2018-09-26 21:45:32,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-26 21:45:32,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-26 21:45:32,625 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:32,626 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 134 states. [2018-09-26 21:45:34,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:34,084 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2018-09-26 21:45:34,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-09-26 21:45:34,084 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 134 [2018-09-26 21:45:34,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:34,084 INFO L225 Difference]: With dead ends: 138 [2018-09-26 21:45:34,085 INFO L226 Difference]: Without dead ends: 136 [2018-09-26 21:45:34,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:34,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-26 21:45:34,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-26 21:45:34,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-26 21:45:34,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-09-26 21:45:34,087 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 134 [2018-09-26 21:45:34,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:34,087 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-09-26 21:45:34,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-26 21:45:34,087 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-09-26 21:45:34,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-26 21:45:34,088 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:34,088 INFO L375 BasicCegarLoop]: trace histogram [132, 1, 1, 1] [2018-09-26 21:45:34,088 INFO L423 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:34,088 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:34,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1464045823, now seen corresponding path program 132 times [2018-09-26 21:45:34,088 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:34,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:34,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:34,089 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:34,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:34,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:35,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:35,515 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:35,516 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:35,522 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:45:35,828 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-26 21:45:35,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:35,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:36,347 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:36,348 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134] total 134 [2018-09-26 21:45:36,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 135 states [2018-09-26 21:45:36,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2018-09-26 21:45:36,351 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:36,351 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 135 states. [2018-09-26 21:45:37,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:37,681 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-26 21:45:37,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-09-26 21:45:37,681 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 135 [2018-09-26 21:45:37,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:37,682 INFO L225 Difference]: With dead ends: 139 [2018-09-26 21:45:37,682 INFO L226 Difference]: Without dead ends: 137 [2018-09-26 21:45:37,682 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:37,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-26 21:45:37,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-26 21:45:37,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-26 21:45:37,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-09-26 21:45:37,684 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 135 [2018-09-26 21:45:37,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:37,684 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-09-26 21:45:37,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 135 states. [2018-09-26 21:45:37,685 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-09-26 21:45:37,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-26 21:45:37,685 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:37,685 INFO L375 BasicCegarLoop]: trace histogram [133, 1, 1, 1] [2018-09-26 21:45:37,685 INFO L423 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:37,685 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:37,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1859217768, now seen corresponding path program 133 times [2018-09-26 21:45:37,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:37,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:37,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:37,686 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:37,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:39,117 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:39,117 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:39,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:39,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:39,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:39,814 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:39,815 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 135] total 135 [2018-09-26 21:45:39,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-26 21:45:39,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-26 21:45:39,818 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:39,818 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 136 states. [2018-09-26 21:45:41,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:41,455 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2018-09-26 21:45:41,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-09-26 21:45:41,455 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 136 [2018-09-26 21:45:41,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:41,455 INFO L225 Difference]: With dead ends: 140 [2018-09-26 21:45:41,455 INFO L226 Difference]: Without dead ends: 138 [2018-09-26 21:45:41,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:41,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-26 21:45:41,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-09-26 21:45:41,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-09-26 21:45:41,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-09-26 21:45:41,458 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 136 [2018-09-26 21:45:41,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:41,458 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-09-26 21:45:41,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-26 21:45:41,458 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-09-26 21:45:41,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-26 21:45:41,458 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:41,458 INFO L375 BasicCegarLoop]: trace histogram [134, 1, 1, 1] [2018-09-26 21:45:41,459 INFO L423 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:41,459 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:41,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1801173985, now seen corresponding path program 134 times [2018-09-26 21:45:41,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:41,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:41,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:41,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:41,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:42,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:42,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:42,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:42,982 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:45:43,182 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:45:43,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:43,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:43,692 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:43,693 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 136] total 136 [2018-09-26 21:45:43,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-09-26 21:45:43,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-09-26 21:45:43,696 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:43,696 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 137 states. [2018-09-26 21:45:45,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:45,341 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-26 21:45:45,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-09-26 21:45:45,341 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 137 [2018-09-26 21:45:45,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:45,341 INFO L225 Difference]: With dead ends: 141 [2018-09-26 21:45:45,341 INFO L226 Difference]: Without dead ends: 139 [2018-09-26 21:45:45,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:45,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-26 21:45:45,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-26 21:45:45,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-26 21:45:45,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-26 21:45:45,344 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 137 [2018-09-26 21:45:45,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:45,344 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-26 21:45:45,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-09-26 21:45:45,344 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-26 21:45:45,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-26 21:45:45,345 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:45,345 INFO L375 BasicCegarLoop]: trace histogram [135, 1, 1, 1] [2018-09-26 21:45:45,345 INFO L423 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:45,345 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:45,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1816712, now seen corresponding path program 135 times [2018-09-26 21:45:45,345 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:45,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:45,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:45,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:45,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:45,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:46,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:46,842 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:46,842 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:46,850 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:45:47,189 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2018-09-26 21:45:47,189 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:47,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-09-26 21:45:47,573 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-26 21:45:47,774 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:47,774 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 21:45:47,779 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 21:45:47,779 INFO L202 PluginConnector]: Adding new model count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:45:47 BoogieIcfgContainer [2018-09-26 21:45:47,779 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:45:47,780 INFO L168 Benchmark]: Toolchain (without parser) took 243682.96 ms. Allocated memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: 569.9 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 107.5 MB). Peak memory consumption was 677.4 MB. Max. memory is 7.1 GB. [2018-09-26 21:45:47,781 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:45:47,782 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.65 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:45:47,782 INFO L168 Benchmark]: Boogie Preprocessor took 22.60 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:45:47,782 INFO L168 Benchmark]: RCFGBuilder took 302.82 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-26 21:45:47,783 INFO L168 Benchmark]: TraceAbstraction took 243312.48 ms. Allocated memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: 569.9 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 86.4 MB). Peak memory consumption was 656.3 MB. Max. memory is 7.1 GB. [2018-09-26 21:45:47,785 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 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 39.65 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.60 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 302.82 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 243312.48 ms. Allocated memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: 569.9 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 86.4 MB). Peak memory consumption was 656.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 43]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 43). Cancelled while BasicCegarLoop was analyzing trace of length 139 with TraceHistMax 135, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 243.2s OverallTime, 136 OverallIterations, 135 TraceHistogramMax, 88.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 405 SDtfs, 0 SDslu, 5843 SDs, 0 SdLazy, 15158 SolverSat, 215 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18628 GetRequests, 9448 SyntacticMatches, 0 SemanticMatches, 9180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=139occurred in iteration=135, 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: 0.3s AutomataMinimizationTime, 135 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 2.6s SsaConstructionTime, 16.9s SatisfiabilityAnalysisTime, 124.9s InterpolantComputationTime, 18897 NumberOfCodeBlocks, 18897 NumberOfCodeBlocksAsserted, 2569 NumberOfCheckSat, 18628 ConstructedInterpolants, 0 QuantifiedInterpolants, 5049262 SizeOfPredicates, 135 NumberOfNonLiveVariables, 101505 ConjunctsInSsa, 9314 ConjunctsInUnsatCore, 269 InterpolantComputations, 1 PerfectInterpolantSequences, 0/820080 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/count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_21-45-47-799.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_21-45-47-799.csv Completed graceful shutdown