java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:17:04,934 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:17:04,937 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:17:04,950 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:17:04,950 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:17:04,951 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:17:04,952 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:17:04,954 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:17:04,956 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:17:04,957 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:17:04,958 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-26 21:17:04,958 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-26 21:17:04,959 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-26 21:17:04,960 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-26 21:17:04,961 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-26 21:17:04,962 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-26 21:17:04,963 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-26 21:17:04,964 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-26 21:17:04,966 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-26 21:17:04,969 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-26 21:17:04,971 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-26 21:17:04,973 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-26 21:17:04,978 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-26 21:17:04,996 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-26 21:17:05,024 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:17:05,025 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:17:05,026 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:17:05,026 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:17:05,027 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:17:05,027 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:17:05,027 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:17:05,028 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:17:05,028 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:17:05,028 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:17:05,029 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:17:05,030 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:17:05,030 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:17:05,030 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:17:05,030 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:17:05,031 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:17:05,031 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:17:05,031 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:17:05,031 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:17:05,031 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:17:05,033 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:17:05,033 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:17:05,033 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:17:05,033 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:17:05,034 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:17:05,034 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:17:05,034 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:17:05,034 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:17:05,034 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:17:05,035 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:17:05,101 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:17:05,116 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:17:05,119 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:17:05,120 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:17:05,120 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:17:05,121 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl [2018-09-26 21:17:05,121 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl' [2018-09-26 21:17:05,181 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:17:05,184 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:17:05,185 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:17:05,186 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:17:05,186 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:17:05,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:17:05" (1/1) ... [2018-09-26 21:17:05,221 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:17:05" (1/1) ... [2018-09-26 21:17:05,228 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:17:05,229 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:17:05,229 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:17:05,229 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:17:05,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:17:05" (1/1) ... [2018-09-26 21:17:05,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:17:05" (1/1) ... [2018-09-26 21:17:05,241 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:17:05" (1/1) ... [2018-09-26 21:17:05,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:17:05" (1/1) ... [2018-09-26 21:17:05,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:17:05" (1/1) ... [2018-09-26 21:17:05,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:17:05" (1/1) ... [2018-09-26 21:17:05,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:17:05" (1/1) ... [2018-09-26 21:17:05,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:17:05,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:17:05,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:17:05,252 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:17:05,254 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:17:05" (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 21:17:05,336 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-26 21:17:05,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-26 21:17:05,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-26 21:17:05,508 INFO L346 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-26 21:17:05,508 INFO L202 PluginConnector]: Adding new model overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:17:05 BoogieIcfgContainer [2018-09-26 21:17:05,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:17:05,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:17:05,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:17:05,513 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:17:05,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:17:05" (1/2) ... [2018-09-26 21:17:05,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f4282e4 and model type overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:17:05, skipping insertion in model container [2018-09-26 21:17:05,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:17:05" (2/2) ... [2018-09-26 21:17:05,518 INFO L112 eAbstractionObserver]: Analyzing ICFG overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl [2018-09-26 21:17:05,527 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:17:05,535 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:17:05,583 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:17:05,584 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:17:05,584 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:17:05,584 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:17:05,585 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:17:05,585 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:17:05,585 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:17:05,585 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:17:05,585 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:17:05,600 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-26 21:17:05,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-26 21:17:05,607 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:05,608 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-26 21:17:05,609 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:05,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:05,615 INFO L82 PathProgramCache]: Analyzing trace with hash 30017, now seen corresponding path program 1 times [2018-09-26 21:17:05,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:05,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:05,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:05,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:05,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:05,795 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 21:17:05,798 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:17:05,798 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-26 21:17:05,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:17:05,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:17:05,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:17:05,820 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-26 21:17:05,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:05,873 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-09-26 21:17:05,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:17:05,875 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-26 21:17:05,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:05,886 INFO L225 Difference]: With dead ends: 9 [2018-09-26 21:17:05,887 INFO L226 Difference]: Without dead ends: 5 [2018-09-26 21:17:05,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:17:05,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-26 21:17:05,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-26 21:17:05,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-26 21:17:05,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-26 21:17:05,932 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-26 21:17:05,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:05,933 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-26 21:17:05,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:17:05,933 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-26 21:17:05,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-26 21:17:05,933 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:05,934 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-26 21:17:05,934 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:05,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:05,935 INFO L82 PathProgramCache]: Analyzing trace with hash 928552, now seen corresponding path program 1 times [2018-09-26 21:17:05,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:05,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:05,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:05,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:05,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:06,031 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 21:17:06,031 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:06,032 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:17:06,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:06,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:06,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:06,119 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 21:17:06,153 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:06,153 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-26 21:17:06,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:17:06,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:17:06,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:17:06,154 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-09-26 21:17:06,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:06,210 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-26 21:17:06,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:17:06,211 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-26 21:17:06,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:06,212 INFO L225 Difference]: With dead ends: 8 [2018-09-26 21:17:06,212 INFO L226 Difference]: Without dead ends: 6 [2018-09-26 21:17:06,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:17:06,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-26 21:17:06,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-26 21:17:06,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-26 21:17:06,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-26 21:17:06,216 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-26 21:17:06,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:06,216 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-26 21:17:06,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:17:06,216 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-26 21:17:06,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-26 21:17:06,217 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:06,217 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-26 21:17:06,217 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:06,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:06,218 INFO L82 PathProgramCache]: Analyzing trace with hash 28783137, now seen corresponding path program 2 times [2018-09-26 21:17:06,218 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:06,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:06,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:06,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:06,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:06,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:06,300 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 21:17:06,300 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:06,301 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 21:17:06,313 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:17:06,330 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:17:06,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:06,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:06,337 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 21:17:06,360 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:06,360 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-26 21:17:06,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:17:06,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:17:06,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:17:06,361 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-26 21:17:06,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:06,400 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-26 21:17:06,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:17:06,401 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-26 21:17:06,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:06,401 INFO L225 Difference]: With dead ends: 9 [2018-09-26 21:17:06,402 INFO L226 Difference]: Without dead ends: 7 [2018-09-26 21:17:06,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:17:06,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-26 21:17:06,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-26 21:17:06,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-26 21:17:06,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-26 21:17:06,406 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-26 21:17:06,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:06,406 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-26 21:17:06,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:17:06,407 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-26 21:17:06,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 21:17:06,407 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:06,407 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-26 21:17:06,408 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:06,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:06,408 INFO L82 PathProgramCache]: Analyzing trace with hash 892275272, now seen corresponding path program 3 times [2018-09-26 21:17:06,408 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:06,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:06,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:06,410 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:06,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:06,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:06,516 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 21:17:06,516 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:06,517 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:06,525 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:17:06,551 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-26 21:17:06,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:06,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:06,559 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 21:17:06,579 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:06,579 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:17:06,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:17:06,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:17:06,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:17:06,581 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-26 21:17:06,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:06,625 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-26 21:17:06,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:17:06,626 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-26 21:17:06,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:06,627 INFO L225 Difference]: With dead ends: 10 [2018-09-26 21:17:06,627 INFO L226 Difference]: Without dead ends: 8 [2018-09-26 21:17:06,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:17:06,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-26 21:17:06,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-26 21:17:06,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-26 21:17:06,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-26 21:17:06,630 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-26 21:17:06,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:06,630 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-26 21:17:06,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:17:06,631 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-26 21:17:06,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-26 21:17:06,631 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:06,631 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-26 21:17:06,631 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:06,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:06,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1890727681, now seen corresponding path program 4 times [2018-09-26 21:17:06,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:06,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:06,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:06,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:06,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:06,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:06,929 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 21:17:06,929 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:06,929 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:06,937 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:17:06,970 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:17:06,970 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:06,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:06,978 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 21:17:07,003 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:07,004 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:17:07,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:17:07,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:17:07,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:17:07,005 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-26 21:17:07,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:07,099 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-26 21:17:07,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:17:07,100 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-26 21:17:07,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:07,100 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:17:07,100 INFO L226 Difference]: Without dead ends: 9 [2018-09-26 21:17:07,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:17:07,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-26 21:17:07,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-26 21:17:07,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-26 21:17:07,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-26 21:17:07,105 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-26 21:17:07,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:07,106 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-26 21:17:07,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:17:07,106 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-26 21:17:07,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:17:07,107 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:07,107 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-26 21:17:07,107 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:07,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:07,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1516986008, now seen corresponding path program 5 times [2018-09-26 21:17:07,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:07,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:07,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:07,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:07,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:07,279 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 21:17:07,280 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:07,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:07,292 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:17:07,308 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-26 21:17:07,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:07,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:07,319 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 21:17:07,344 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:07,344 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:17:07,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:17:07,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:17:07,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:17:07,345 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-26 21:17:07,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:07,463 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-26 21:17:07,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:17:07,467 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-26 21:17:07,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:07,467 INFO L225 Difference]: With dead ends: 12 [2018-09-26 21:17:07,467 INFO L226 Difference]: Without dead ends: 10 [2018-09-26 21:17:07,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:17:07,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-26 21:17:07,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-26 21:17:07,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-26 21:17:07,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-26 21:17:07,471 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-26 21:17:07,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:07,472 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-26 21:17:07,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:17:07,472 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-26 21:17:07,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:17:07,472 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:07,473 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-26 21:17:07,473 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:07,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:07,473 INFO L82 PathProgramCache]: Analyzing trace with hash 218072033, now seen corresponding path program 6 times [2018-09-26 21:17:07,474 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:07,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:07,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:07,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:07,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:07,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:07,603 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 21:17:07,603 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:07,603 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:07,616 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:17:07,627 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-26 21:17:07,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:07,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:07,638 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 21:17:07,661 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:07,661 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:17:07,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:17:07,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:17:07,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:17:07,662 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-26 21:17:07,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:07,703 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-26 21:17:07,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:17:07,707 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-26 21:17:07,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:07,707 INFO L225 Difference]: With dead ends: 13 [2018-09-26 21:17:07,707 INFO L226 Difference]: Without dead ends: 11 [2018-09-26 21:17:07,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:17:07,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-26 21:17:07,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-26 21:17:07,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-26 21:17:07,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-26 21:17:07,711 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-26 21:17:07,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:07,712 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-26 21:17:07,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:17:07,712 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-26 21:17:07,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:17:07,712 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:07,713 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-26 21:17:07,713 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:07,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:07,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1829703544, now seen corresponding path program 7 times [2018-09-26 21:17:07,713 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:07,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:07,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:07,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:07,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:07,932 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 21:17:07,933 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:07,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:07,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:07,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:07,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:07,976 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 21:17:08,008 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:08,009 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:17:08,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:17:08,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:17:08,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:17:08,013 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-26 21:17:08,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:08,248 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-26 21:17:08,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:17:08,249 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-26 21:17:08,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:08,250 INFO L225 Difference]: With dead ends: 14 [2018-09-26 21:17:08,250 INFO L226 Difference]: Without dead ends: 12 [2018-09-26 21:17:08,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:17:08,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-26 21:17:08,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-26 21:17:08,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-26 21:17:08,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-26 21:17:08,254 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-26 21:17:08,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:08,254 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-26 21:17:08,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:17:08,254 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-26 21:17:08,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:17:08,255 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:08,255 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-26 21:17:08,255 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:08,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:08,256 INFO L82 PathProgramCache]: Analyzing trace with hash -886236991, now seen corresponding path program 8 times [2018-09-26 21:17:08,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:08,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:08,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:08,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:08,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:08,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:08,428 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 21:17:08,429 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:08,429 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:08,438 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:17:08,456 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:17:08,456 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:08,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:08,466 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 21:17:08,490 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:08,490 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:17:08,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:17:08,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:17:08,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:17:08,492 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-09-26 21:17:08,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:08,572 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-26 21:17:08,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:17:08,573 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-09-26 21:17:08,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:08,574 INFO L225 Difference]: With dead ends: 15 [2018-09-26 21:17:08,574 INFO L226 Difference]: Without dead ends: 13 [2018-09-26 21:17:08,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:17:08,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-26 21:17:08,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-26 21:17:08,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-26 21:17:08,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-26 21:17:08,577 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-26 21:17:08,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:08,577 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-26 21:17:08,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:17:08,577 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-26 21:17:08,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-26 21:17:08,578 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:08,578 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-26 21:17:08,578 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:08,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:08,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1703544920, now seen corresponding path program 9 times [2018-09-26 21:17:08,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:08,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:08,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:08,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:08,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:08,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:08,718 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 21:17:08,719 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:08,719 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:08,729 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:17:08,741 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-26 21:17:08,741 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:08,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:08,752 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 21:17:08,774 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:08,775 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-26 21:17:08,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:17:08,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:17:08,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:17:08,776 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-09-26 21:17:08,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:08,815 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-26 21:17:08,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:17:08,816 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-26 21:17:08,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:08,817 INFO L225 Difference]: With dead ends: 16 [2018-09-26 21:17:08,817 INFO L226 Difference]: Without dead ends: 14 [2018-09-26 21:17:08,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:17:08,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-26 21:17:08,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-26 21:17:08,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-26 21:17:08,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-26 21:17:08,822 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-26 21:17:08,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:08,822 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-26 21:17:08,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:17:08,822 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-26 21:17:08,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:17:08,823 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:08,823 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-26 21:17:08,823 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:08,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:08,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1270286943, now seen corresponding path program 10 times [2018-09-26 21:17:08,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:08,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:08,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:08,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:08,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:08,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:09,203 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 21:17:09,203 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:09,203 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:09,212 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:17:09,228 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:17:09,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:09,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:09,239 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 21:17:09,260 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:09,260 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-26 21:17:09,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:17:09,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:17:09,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:17:09,262 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-09-26 21:17:09,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:09,288 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-26 21:17:09,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:17:09,288 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-26 21:17:09,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:09,289 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:17:09,290 INFO L226 Difference]: Without dead ends: 15 [2018-09-26 21:17:09,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:17:09,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-26 21:17:09,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-26 21:17:09,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-26 21:17:09,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-26 21:17:09,294 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-26 21:17:09,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:09,294 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-26 21:17:09,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:17:09,294 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-26 21:17:09,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:17:09,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:09,295 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-26 21:17:09,295 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:09,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:09,295 INFO L82 PathProgramCache]: Analyzing trace with hash -724191544, now seen corresponding path program 11 times [2018-09-26 21:17:09,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:09,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:09,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:09,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:09,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:09,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:09,583 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 21:17:09,584 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:09,584 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:09,595 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:17:09,640 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:17:09,640 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:09,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:09,651 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 21:17:09,673 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:09,673 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-26 21:17:09,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:17:09,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:17:09,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:17:09,674 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-09-26 21:17:09,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:09,715 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-26 21:17:09,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:17:09,716 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-26 21:17:09,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:09,716 INFO L225 Difference]: With dead ends: 18 [2018-09-26 21:17:09,717 INFO L226 Difference]: Without dead ends: 16 [2018-09-26 21:17:09,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:17:09,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-26 21:17:09,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-26 21:17:09,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:17:09,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-26 21:17:09,721 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-26 21:17:09,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:09,721 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-26 21:17:09,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:17:09,722 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-26 21:17:09,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:17:09,722 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:09,722 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-26 21:17:09,722 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:09,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:09,723 INFO L82 PathProgramCache]: Analyzing trace with hash -975103359, now seen corresponding path program 12 times [2018-09-26 21:17:09,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:09,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:09,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:09,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:09,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:09,974 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 21:17:09,974 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:09,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:09,983 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:17:09,998 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:17:09,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:10,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:10,011 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 21:17:10,035 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:10,035 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-26 21:17:10,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:17:10,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:17:10,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:17:10,036 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-09-26 21:17:10,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:10,076 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-26 21:17:10,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:17:10,079 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-26 21:17:10,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:10,079 INFO L225 Difference]: With dead ends: 19 [2018-09-26 21:17:10,079 INFO L226 Difference]: Without dead ends: 17 [2018-09-26 21:17:10,080 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:17:10,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-26 21:17:10,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-26 21:17:10,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-26 21:17:10,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-26 21:17:10,083 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-26 21:17:10,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:10,084 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-26 21:17:10,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:17:10,084 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-26 21:17:10,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-26 21:17:10,085 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:10,085 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-26 21:17:10,085 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:10,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:10,086 INFO L82 PathProgramCache]: Analyzing trace with hash -163435032, now seen corresponding path program 13 times [2018-09-26 21:17:10,086 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:10,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:10,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:10,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:10,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:10,358 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 21:17:10,358 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:10,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:10,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:10,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:10,395 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 21:17:10,423 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:10,423 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-26 21:17:10,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:17:10,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:17:10,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:17:10,425 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-09-26 21:17:10,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:10,672 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-26 21:17:10,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:17:10,672 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-09-26 21:17:10,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:10,673 INFO L225 Difference]: With dead ends: 20 [2018-09-26 21:17:10,673 INFO L226 Difference]: Without dead ends: 18 [2018-09-26 21:17:10,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:17:10,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-26 21:17:10,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-26 21:17:10,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:17:10,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-26 21:17:10,678 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-26 21:17:10,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:10,679 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-26 21:17:10,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:17:10,679 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-26 21:17:10,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:17:10,679 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:10,679 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-26 21:17:10,680 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:10,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:10,680 INFO L82 PathProgramCache]: Analyzing trace with hash -771520671, now seen corresponding path program 14 times [2018-09-26 21:17:10,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:10,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:10,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:10,681 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:10,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:10,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:10,944 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 21:17:10,945 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:10,945 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:10,956 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:17:10,982 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:17:10,983 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:10,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:10,995 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 21:17:11,020 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:11,021 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-26 21:17:11,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:17:11,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:17:11,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:17:11,022 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-09-26 21:17:11,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:11,083 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-26 21:17:11,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:17:11,084 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-09-26 21:17:11,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:11,084 INFO L225 Difference]: With dead ends: 21 [2018-09-26 21:17:11,085 INFO L226 Difference]: Without dead ends: 19 [2018-09-26 21:17:11,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:17:11,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-26 21:17:11,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-26 21:17:11,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-26 21:17:11,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-26 21:17:11,089 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-26 21:17:11,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:11,090 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-26 21:17:11,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:17:11,090 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-26 21:17:11,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:17:11,091 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:11,091 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-26 21:17:11,091 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:11,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:11,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1852661000, now seen corresponding path program 15 times [2018-09-26 21:17:11,092 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:11,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:11,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:11,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:11,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:11,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:11,328 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 21:17:11,329 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:11,329 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:11,337 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:17:11,360 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:17:11,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:11,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:11,371 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 21:17:11,393 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:11,393 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-26 21:17:11,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:17:11,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:17:11,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:17:11,394 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-09-26 21:17:11,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:11,426 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-26 21:17:11,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:17:11,427 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-26 21:17:11,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:11,427 INFO L225 Difference]: With dead ends: 22 [2018-09-26 21:17:11,427 INFO L226 Difference]: Without dead ends: 20 [2018-09-26 21:17:11,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:17:11,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-26 21:17:11,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-26 21:17:11,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:17:11,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-26 21:17:11,432 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-26 21:17:11,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:11,432 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-26 21:17:11,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:17:11,432 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-26 21:17:11,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:17:11,433 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:11,433 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-09-26 21:17:11,433 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:11,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:11,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1597914177, now seen corresponding path program 16 times [2018-09-26 21:17:11,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:11,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:11,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:11,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:11,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:11,880 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 21:17:11,880 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:11,880 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:11,887 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:17:11,925 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:17:11,926 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:11,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:11,942 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 21:17:11,969 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:11,970 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-26 21:17:11,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-26 21:17:11,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-26 21:17:11,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:17:11,971 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-09-26 21:17:12,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:12,142 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-26 21:17:12,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:17:12,143 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-26 21:17:12,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:12,144 INFO L225 Difference]: With dead ends: 23 [2018-09-26 21:17:12,144 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 21:17:12,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:17:12,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 21:17:12,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-26 21:17:12,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-26 21:17:12,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-26 21:17:12,148 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-26 21:17:12,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:12,148 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-26 21:17:12,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-26 21:17:12,148 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-26 21:17:12,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-26 21:17:12,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:12,149 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-26 21:17:12,149 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:12,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:12,150 INFO L82 PathProgramCache]: Analyzing trace with hash -2004270040, now seen corresponding path program 17 times [2018-09-26 21:17:12,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:12,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:12,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:12,151 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:12,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:12,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:12,589 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 21:17:12,590 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:12,590 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:12,597 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:17:12,665 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-26 21:17:12,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:12,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:12,677 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 21:17:12,703 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:12,703 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-26 21:17:12,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:17:12,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:17:12,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:17:12,704 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-09-26 21:17:12,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:12,773 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-26 21:17:12,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:17:12,774 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-09-26 21:17:12,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:12,774 INFO L225 Difference]: With dead ends: 24 [2018-09-26 21:17:12,774 INFO L226 Difference]: Without dead ends: 22 [2018-09-26 21:17:12,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:17:12,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-26 21:17:12,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-26 21:17:12,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:17:12,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-26 21:17:12,779 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-26 21:17:12,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:12,779 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-26 21:17:12,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:17:12,782 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-26 21:17:12,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-26 21:17:12,783 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:12,783 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-26 21:17:12,783 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:12,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:12,784 INFO L82 PathProgramCache]: Analyzing trace with hash -2002831071, now seen corresponding path program 18 times [2018-09-26 21:17:12,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:12,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:12,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:12,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:12,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:12,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:13,141 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 21:17:13,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:13,142 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:13,153 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:17:13,298 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-26 21:17:13,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:13,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:13,312 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 21:17:13,346 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:13,346 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-26 21:17:13,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-26 21:17:13,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-26 21:17:13,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:17:13,347 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-09-26 21:17:13,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:13,456 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-26 21:17:13,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:17:13,456 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-26 21:17:13,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:13,457 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:17:13,458 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:17:13,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:17:13,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:17:13,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-26 21:17:13,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-26 21:17:13,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-26 21:17:13,462 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-26 21:17:13,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:13,462 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-26 21:17:13,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-26 21:17:13,463 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-26 21:17:13,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 21:17:13,463 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:13,464 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-26 21:17:13,464 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:13,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:13,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1958223032, now seen corresponding path program 19 times [2018-09-26 21:17:13,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:13,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:13,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:13,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:13,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:13,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:13,890 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 21:17:13,891 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:13,891 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:13,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:13,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:13,940 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 21:17:13,970 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:13,970 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-26 21:17:13,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:17:13,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:17:13,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:17:13,972 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-09-26 21:17:14,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:14,071 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-26 21:17:14,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:17:14,071 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-26 21:17:14,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:14,072 INFO L225 Difference]: With dead ends: 26 [2018-09-26 21:17:14,072 INFO L226 Difference]: Without dead ends: 24 [2018-09-26 21:17:14,073 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:17:14,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-26 21:17:14,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-26 21:17:14,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:17:14,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-26 21:17:14,077 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-26 21:17:14,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:14,077 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-26 21:17:14,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:17:14,077 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-26 21:17:14,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-26 21:17:14,078 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:14,078 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-26 21:17:14,078 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:14,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:14,079 INFO L82 PathProgramCache]: Analyzing trace with hash -575373823, now seen corresponding path program 20 times [2018-09-26 21:17:14,079 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:14,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:14,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:14,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:14,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:14,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:14,360 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 21:17:14,360 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:14,361 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:14,377 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:17:14,401 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:17:14,401 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:14,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:14,421 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 21:17:14,451 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:14,451 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-26 21:17:14,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:17:14,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:17:14,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:17:14,452 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-09-26 21:17:14,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:14,614 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-26 21:17:14,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:17:14,615 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-09-26 21:17:14,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:14,616 INFO L225 Difference]: With dead ends: 27 [2018-09-26 21:17:14,616 INFO L226 Difference]: Without dead ends: 25 [2018-09-26 21:17:14,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:17:14,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-26 21:17:14,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-26 21:17:14,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-26 21:17:14,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-26 21:17:14,620 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-26 21:17:14,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:14,620 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-26 21:17:14,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:17:14,621 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-26 21:17:14,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-26 21:17:14,621 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:14,621 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-26 21:17:14,622 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:14,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:14,622 INFO L82 PathProgramCache]: Analyzing trace with hash -656721304, now seen corresponding path program 21 times [2018-09-26 21:17:14,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:14,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:14,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:14,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:14,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:15,084 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 21:17:15,085 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:15,085 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:15,092 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:17:15,117 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-26 21:17:15,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:15,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:15,128 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 21:17:15,150 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:15,150 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-26 21:17:15,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:17:15,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:17:15,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:17:15,151 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-09-26 21:17:15,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:15,221 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-26 21:17:15,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:17:15,223 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-09-26 21:17:15,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:15,224 INFO L225 Difference]: With dead ends: 28 [2018-09-26 21:17:15,224 INFO L226 Difference]: Without dead ends: 26 [2018-09-26 21:17:15,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:17:15,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-26 21:17:15,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-26 21:17:15,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:17:15,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-26 21:17:15,228 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-26 21:17:15,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:15,228 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-26 21:17:15,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:17:15,228 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-26 21:17:15,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-26 21:17:15,229 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:15,229 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-26 21:17:15,229 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:15,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:15,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1116474081, now seen corresponding path program 22 times [2018-09-26 21:17:15,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:15,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:15,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:15,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:15,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:15,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:15,638 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 21:17:15,639 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:15,639 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:15,647 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:17:15,664 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:17:15,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:15,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:15,677 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 21:17:15,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:15,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-26 21:17:15,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-26 21:17:15,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-26 21:17:15,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:17:15,704 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-09-26 21:17:15,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:15,760 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-26 21:17:15,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:17:15,761 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-09-26 21:17:15,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:15,761 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:17:15,762 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:17:15,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:17:15,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:17:15,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-26 21:17:15,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-26 21:17:15,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-26 21:17:15,767 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-26 21:17:15,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:15,767 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-26 21:17:15,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-26 21:17:15,767 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-26 21:17:15,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-26 21:17:15,768 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:15,768 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-26 21:17:15,768 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:15,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:15,769 INFO L82 PathProgramCache]: Analyzing trace with hash 250956168, now seen corresponding path program 23 times [2018-09-26 21:17:15,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:15,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:15,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:15,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:15,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:15,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:16,245 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 21:17:16,246 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:16,246 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:16,261 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:17:16,295 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-26 21:17:16,295 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:16,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:16,308 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 21:17:16,331 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:16,332 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-26 21:17:16,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:17:16,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:17:16,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:17:16,333 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-09-26 21:17:16,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:16,419 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-26 21:17:16,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:17:16,420 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-26 21:17:16,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:16,421 INFO L225 Difference]: With dead ends: 30 [2018-09-26 21:17:16,421 INFO L226 Difference]: Without dead ends: 28 [2018-09-26 21:17:16,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:17:16,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-26 21:17:16,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-26 21:17:16,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:17:16,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-26 21:17:16,427 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-26 21:17:16,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:16,427 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-26 21:17:16,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:17:16,427 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-26 21:17:16,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-26 21:17:16,428 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:16,428 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-09-26 21:17:16,429 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:16,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:16,429 INFO L82 PathProgramCache]: Analyzing trace with hash -810295359, now seen corresponding path program 24 times [2018-09-26 21:17:16,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:16,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:16,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:16,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:16,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:17,048 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 21:17:17,048 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:17,048 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:17,057 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:17:17,075 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-26 21:17:17,075 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:17,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:17,087 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 21:17:17,117 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:17,117 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-26 21:17:17,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-26 21:17:17,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-26 21:17:17,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:17:17,118 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-09-26 21:17:17,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:17,218 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-26 21:17:17,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:17:17,219 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-09-26 21:17:17,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:17,220 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:17:17,220 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:17:17,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:17:17,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:17:17,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-26 21:17:17,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-26 21:17:17,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-26 21:17:17,225 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-26 21:17:17,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:17,226 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-26 21:17:17,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-26 21:17:17,226 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-26 21:17:17,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-26 21:17:17,227 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:17,227 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-26 21:17:17,227 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:17,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:17,228 INFO L82 PathProgramCache]: Analyzing trace with hash 650645672, now seen corresponding path program 25 times [2018-09-26 21:17:17,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:17,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:17,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:17,229 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:17,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:17,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:18,060 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 21:17:18,060 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:18,060 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:18,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:18,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:18,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:18,098 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 21:17:18,118 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:18,118 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-26 21:17:18,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:17:18,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:17:18,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:17:18,119 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-09-26 21:17:18,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:18,212 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-26 21:17:18,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:17:18,213 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-09-26 21:17:18,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:18,213 INFO L225 Difference]: With dead ends: 32 [2018-09-26 21:17:18,213 INFO L226 Difference]: Without dead ends: 30 [2018-09-26 21:17:18,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:17:18,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-26 21:17:18,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-26 21:17:18,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:17:18,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-26 21:17:18,218 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-26 21:17:18,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:18,218 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-26 21:17:18,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:17:18,219 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-26 21:17:18,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-26 21:17:18,219 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:18,219 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-26 21:17:18,219 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:18,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:18,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1304822623, now seen corresponding path program 26 times [2018-09-26 21:17:18,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:18,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:18,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:18,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:18,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:18,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:19,099 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 21:17:19,099 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:19,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:19,106 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:17:19,124 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:17:19,125 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:19,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:19,142 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 21:17:19,172 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:19,172 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-26 21:17:19,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:17:19,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:17:19,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:17:19,173 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-09-26 21:17:19,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:19,451 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-26 21:17:19,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:17:19,451 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-09-26 21:17:19,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:19,452 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:17:19,452 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:17:19,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:17:19,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:17:19,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-26 21:17:19,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-26 21:17:19,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-26 21:17:19,457 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-26 21:17:19,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:19,457 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-26 21:17:19,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:17:19,458 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-26 21:17:19,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-26 21:17:19,458 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:19,458 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-26 21:17:19,458 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:19,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:19,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1794797624, now seen corresponding path program 27 times [2018-09-26 21:17:19,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:19,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:19,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:19,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:19,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:19,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:20,824 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 21:17:20,824 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:20,824 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:20,832 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:17:20,851 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-26 21:17:20,851 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:20,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:20,874 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 21:17:20,903 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:20,903 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-26 21:17:20,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:17:20,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:17:20,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:17:20,904 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-09-26 21:17:20,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:20,950 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-26 21:17:20,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:17:20,951 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-26 21:17:20,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:20,951 INFO L225 Difference]: With dead ends: 34 [2018-09-26 21:17:20,952 INFO L226 Difference]: Without dead ends: 32 [2018-09-26 21:17:20,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:17:20,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-26 21:17:20,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-26 21:17:20,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:17:20,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-26 21:17:20,955 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-26 21:17:20,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:20,955 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-26 21:17:20,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:17:20,956 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-26 21:17:20,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-26 21:17:20,956 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:20,956 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-26 21:17:20,956 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:20,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:20,957 INFO L82 PathProgramCache]: Analyzing trace with hash 195846529, now seen corresponding path program 28 times [2018-09-26 21:17:20,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:20,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:20,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:20,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:20,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:21,352 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 21:17:21,352 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:21,352 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:21,364 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:17:21,381 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:17:21,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:21,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:21,392 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 21:17:21,416 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:21,416 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-26 21:17:21,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-26 21:17:21,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-26 21:17:21,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:17:21,417 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-09-26 21:17:21,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:21,473 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-26 21:17:21,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:17:21,474 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-09-26 21:17:21,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:21,474 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:17:21,475 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:17:21,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:17:21,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:17:21,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-26 21:17:21,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-26 21:17:21,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-26 21:17:21,479 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-26 21:17:21,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:21,479 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-26 21:17:21,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-26 21:17:21,482 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-26 21:17:21,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-26 21:17:21,482 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:21,482 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-26 21:17:21,483 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:21,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:21,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1776273128, now seen corresponding path program 29 times [2018-09-26 21:17:21,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:21,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:21,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:21,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:21,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:21,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:21,900 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 21:17:21,901 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:21,901 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:21,910 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:17:21,935 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-26 21:17:21,935 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:21,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:21,950 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 21:17:21,980 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:21,980 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-26 21:17:21,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:17:21,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:17:21,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:17:21,981 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-09-26 21:17:22,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:22,179 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-26 21:17:22,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:17:22,179 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-09-26 21:17:22,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:22,180 INFO L225 Difference]: With dead ends: 36 [2018-09-26 21:17:22,180 INFO L226 Difference]: Without dead ends: 34 [2018-09-26 21:17:22,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:17:22,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-26 21:17:22,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-26 21:17:22,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:17:22,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-26 21:17:22,183 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-26 21:17:22,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:22,183 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-26 21:17:22,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:17:22,184 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-26 21:17:22,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-26 21:17:22,184 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:22,184 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-09-26 21:17:22,184 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:22,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:22,185 INFO L82 PathProgramCache]: Analyzing trace with hash -770109855, now seen corresponding path program 30 times [2018-09-26 21:17:22,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:22,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:22,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:22,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:22,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:22,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:23,372 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 21:17:23,373 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:23,373 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:23,384 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:17:23,422 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-26 21:17:23,422 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:23,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:23,435 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 21:17:23,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:23,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-26 21:17:23,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-26 21:17:23,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-26 21:17:23,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:17:23,466 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-09-26 21:17:23,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:23,602 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-26 21:17:23,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:17:23,602 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-09-26 21:17:23,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:23,603 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:17:23,603 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:17:23,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:17:23,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:17:23,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-26 21:17:23,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-26 21:17:23,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-26 21:17:23,608 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-26 21:17:23,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:23,608 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-26 21:17:23,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-26 21:17:23,608 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-26 21:17:23,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-26 21:17:23,608 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:23,608 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-26 21:17:23,609 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:23,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:23,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1896396296, now seen corresponding path program 31 times [2018-09-26 21:17:23,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:23,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:23,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:23,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:23,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:24,134 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 21:17:24,135 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:24,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:24,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:24,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:24,173 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 21:17:24,196 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:24,197 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-26 21:17:24,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:17:24,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:17:24,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:17:24,198 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-09-26 21:17:24,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:24,256 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-26 21:17:24,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:17:24,256 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-09-26 21:17:24,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:24,257 INFO L225 Difference]: With dead ends: 38 [2018-09-26 21:17:24,257 INFO L226 Difference]: Without dead ends: 36 [2018-09-26 21:17:24,258 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:17:24,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-26 21:17:24,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-26 21:17:24,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-26 21:17:24,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-26 21:17:24,262 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-26 21:17:24,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:24,262 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-26 21:17:24,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:17:24,262 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-26 21:17:24,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-26 21:17:24,263 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:24,263 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-09-26 21:17:24,263 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:24,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:24,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1341258943, now seen corresponding path program 32 times [2018-09-26 21:17:24,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:24,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:24,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:24,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:24,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:24,753 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 21:17:24,753 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:24,753 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:24,762 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:17:24,779 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:17:24,779 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:24,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:24,792 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 21:17:24,819 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:24,819 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-26 21:17:24,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-26 21:17:24,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-26 21:17:24,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:17:24,820 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-09-26 21:17:24,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:24,882 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-26 21:17:24,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:17:24,882 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-09-26 21:17:24,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:24,883 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:17:24,883 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:17:24,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:17:24,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:17:24,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-26 21:17:24,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-26 21:17:24,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-26 21:17:24,888 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-26 21:17:24,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:24,888 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-26 21:17:24,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-26 21:17:24,888 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-26 21:17:24,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-26 21:17:24,888 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:24,888 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-26 21:17:24,889 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:24,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:24,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1370643752, now seen corresponding path program 33 times [2018-09-26 21:17:24,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:24,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:24,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:24,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:24,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:25,432 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 21:17:25,432 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:25,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:25,440 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:17:25,471 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-26 21:17:25,471 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:25,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:25,479 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 21:17:25,499 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:25,499 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-26 21:17:25,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:17:25,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:17:25,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:17:25,500 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-09-26 21:17:25,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:25,620 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-26 21:17:25,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:17:25,621 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-09-26 21:17:25,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:25,621 INFO L225 Difference]: With dead ends: 40 [2018-09-26 21:17:25,621 INFO L226 Difference]: Without dead ends: 38 [2018-09-26 21:17:25,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:17:25,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-26 21:17:25,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-26 21:17:25,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-26 21:17:25,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-26 21:17:25,625 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-26 21:17:25,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:25,625 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-26 21:17:25,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:17:25,625 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-26 21:17:25,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-26 21:17:25,625 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:25,625 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-09-26 21:17:25,626 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:25,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:25,626 INFO L82 PathProgramCache]: Analyzing trace with hash -459718623, now seen corresponding path program 34 times [2018-09-26 21:17:25,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:25,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:25,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:25,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:25,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:26,137 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 21:17:26,137 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:26,137 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:26,145 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:17:26,167 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:17:26,167 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:26,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:26,176 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 21:17:26,196 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:26,197 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-26 21:17:26,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-26 21:17:26,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-26 21:17:26,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:17:26,198 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-09-26 21:17:26,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:26,258 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-26 21:17:26,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:17:26,259 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-09-26 21:17:26,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:26,260 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:17:26,260 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:17:26,261 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:17:26,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:17:26,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-26 21:17:26,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-26 21:17:26,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-26 21:17:26,264 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-26 21:17:26,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:26,264 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-26 21:17:26,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-26 21:17:26,264 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-26 21:17:26,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-26 21:17:26,265 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:26,265 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-26 21:17:26,265 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:26,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:26,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1366377400, now seen corresponding path program 35 times [2018-09-26 21:17:26,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:26,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:26,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:26,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:26,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:26,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:27,538 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 21:17:27,539 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:27,539 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:27,547 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:17:27,576 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-26 21:17:27,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:27,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:27,590 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 21:17:27,611 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:27,611 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-26 21:17:27,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:17:27,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:17:27,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:17:27,613 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-09-26 21:17:27,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:27,708 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-26 21:17:27,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:17:27,709 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-09-26 21:17:27,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:27,709 INFO L225 Difference]: With dead ends: 42 [2018-09-26 21:17:27,709 INFO L226 Difference]: Without dead ends: 40 [2018-09-26 21:17:27,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:17:27,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-26 21:17:27,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-26 21:17:27,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-26 21:17:27,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-26 21:17:27,712 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-26 21:17:27,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:27,712 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-26 21:17:27,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:17:27,712 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-26 21:17:27,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-26 21:17:27,713 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:27,713 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-09-26 21:17:27,713 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:27,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:27,714 INFO L82 PathProgramCache]: Analyzing trace with hash 591971585, now seen corresponding path program 36 times [2018-09-26 21:17:27,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:27,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:27,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:27,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:27,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:28,646 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 21:17:28,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:28,647 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:28,654 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:17:28,682 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-26 21:17:28,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:28,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:28,694 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 21:17:28,727 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:28,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-26 21:17:28,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-26 21:17:28,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-26 21:17:28,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:17:28,729 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-09-26 21:17:29,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:29,371 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-26 21:17:29,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:17:29,372 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-09-26 21:17:29,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:29,372 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:17:29,372 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:17:29,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:17:29,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:17:29,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-26 21:17:29,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-26 21:17:29,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-26 21:17:29,375 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-26 21:17:29,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:29,376 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-26 21:17:29,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-26 21:17:29,376 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-26 21:17:29,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-26 21:17:29,376 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:29,377 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-26 21:17:29,377 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:29,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:29,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1171247976, now seen corresponding path program 37 times [2018-09-26 21:17:29,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:29,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:29,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:29,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:29,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:30,683 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 21:17:30,684 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:30,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:30,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:30,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:30,723 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 21:17:30,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:30,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-26 21:17:30,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:17:30,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:17:30,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:17:30,744 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-09-26 21:17:30,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:30,808 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-26 21:17:30,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-26 21:17:30,808 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-09-26 21:17:30,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:30,809 INFO L225 Difference]: With dead ends: 44 [2018-09-26 21:17:30,809 INFO L226 Difference]: Without dead ends: 42 [2018-09-26 21:17:30,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:17:30,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-26 21:17:30,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-26 21:17:30,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-26 21:17:30,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-26 21:17:30,813 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-26 21:17:30,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:30,813 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-26 21:17:30,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:17:30,813 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-26 21:17:30,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-26 21:17:30,813 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:30,814 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-09-26 21:17:30,814 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:30,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:30,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1948946913, now seen corresponding path program 38 times [2018-09-26 21:17:30,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:30,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:30,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:30,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:30,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:31,737 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 21:17:31,738 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:31,738 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:31,745 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:17:31,766 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:17:31,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:31,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:31,778 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 21:17:31,800 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:31,801 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-26 21:17:31,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:17:31,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:17:31,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:17:31,802 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-09-26 21:17:31,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:31,868 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-26 21:17:31,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:17:31,868 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-09-26 21:17:31,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:31,869 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:17:31,869 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:17:31,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:17:31,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:17:31,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-26 21:17:31,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-26 21:17:31,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-26 21:17:31,872 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-26 21:17:31,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:31,873 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-26 21:17:31,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:17:31,873 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-26 21:17:31,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-26 21:17:31,873 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:31,873 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-26 21:17:31,873 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:31,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:31,874 INFO L82 PathProgramCache]: Analyzing trace with hash 287810184, now seen corresponding path program 39 times [2018-09-26 21:17:31,874 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:31,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:31,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:31,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:31,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:31,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:32,727 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 21:17:32,728 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:32,728 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:32,736 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:17:32,767 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-26 21:17:32,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:32,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:32,781 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 21:17:32,806 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:32,806 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-26 21:17:32,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:17:32,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:17:32,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:17:32,807 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-09-26 21:17:32,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:32,905 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-26 21:17:32,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:17:32,905 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-09-26 21:17:32,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:32,906 INFO L225 Difference]: With dead ends: 46 [2018-09-26 21:17:32,906 INFO L226 Difference]: Without dead ends: 44 [2018-09-26 21:17:32,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:17:32,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-26 21:17:32,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-26 21:17:32,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-26 21:17:32,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-26 21:17:32,909 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-26 21:17:32,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:32,909 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-26 21:17:32,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:17:32,909 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-26 21:17:32,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-26 21:17:32,909 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:32,909 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-09-26 21:17:32,910 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:32,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:32,910 INFO L82 PathProgramCache]: Analyzing trace with hash 332179137, now seen corresponding path program 40 times [2018-09-26 21:17:32,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:32,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:32,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:32,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:32,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:33,996 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 21:17:33,997 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:33,997 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:34,006 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:17:34,037 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:17:34,038 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:34,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:34,050 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 21:17:34,070 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:34,070 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-26 21:17:34,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-26 21:17:34,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-26 21:17:34,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:17:34,071 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-09-26 21:17:34,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:34,162 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-26 21:17:34,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:17:34,162 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-09-26 21:17:34,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:34,163 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:17:34,163 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:17:34,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:17:34,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:17:34,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-26 21:17:34,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-26 21:17:34,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-26 21:17:34,166 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-26 21:17:34,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:34,167 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-26 21:17:34,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-26 21:17:34,167 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-26 21:17:34,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-26 21:17:34,167 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:34,167 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-26 21:17:34,167 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:34,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:34,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1707616680, now seen corresponding path program 41 times [2018-09-26 21:17:34,168 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:34,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:34,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:34,168 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:34,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:34,975 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 21:17:34,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:34,976 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:17:34,984 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:17:35,018 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-26 21:17:35,018 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:35,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:35,031 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 21:17:35,055 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:35,055 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-26 21:17:35,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:17:35,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:17:35,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:17:35,057 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-09-26 21:17:35,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:35,118 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-26 21:17:35,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-26 21:17:35,118 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-09-26 21:17:35,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:35,119 INFO L225 Difference]: With dead ends: 48 [2018-09-26 21:17:35,119 INFO L226 Difference]: Without dead ends: 46 [2018-09-26 21:17:35,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:17:35,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-26 21:17:35,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-26 21:17:35,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-26 21:17:35,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-26 21:17:35,122 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-26 21:17:35,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:35,123 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-26 21:17:35,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:17:35,123 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-26 21:17:35,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-26 21:17:35,123 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:35,123 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-09-26 21:17:35,124 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:35,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:35,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1396507553, now seen corresponding path program 42 times [2018-09-26 21:17:35,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:35,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:35,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:35,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:35,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:35,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:35,915 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 21:17:35,915 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:35,915 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:17:35,922 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:17:35,958 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-26 21:17:35,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:35,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:35,970 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 21:17:35,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:35,994 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-26 21:17:35,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-26 21:17:35,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-26 21:17:35,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:17:35,996 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-09-26 21:17:36,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:36,077 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-26 21:17:36,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-26 21:17:36,078 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-09-26 21:17:36,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:36,078 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:17:36,078 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:17:36,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:17:36,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:17:36,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-26 21:17:36,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-26 21:17:36,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-26 21:17:36,081 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-26 21:17:36,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:36,082 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-26 21:17:36,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-26 21:17:36,082 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-26 21:17:36,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-26 21:17:36,082 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:36,083 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-26 21:17:36,083 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:36,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:36,083 INFO L82 PathProgramCache]: Analyzing trace with hash 342059208, now seen corresponding path program 43 times [2018-09-26 21:17:36,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:36,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:36,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:36,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:36,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:36,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:36,913 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 21:17:36,913 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:36,913 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:17:36,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:36,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:36,959 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 21:17:36,979 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:36,979 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-26 21:17:36,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-26 21:17:36,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-26 21:17:36,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:17:36,981 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-09-26 21:17:37,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:37,075 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-26 21:17:37,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-26 21:17:37,076 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-09-26 21:17:37,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:37,077 INFO L225 Difference]: With dead ends: 50 [2018-09-26 21:17:37,077 INFO L226 Difference]: Without dead ends: 48 [2018-09-26 21:17:37,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:17:37,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-26 21:17:37,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-26 21:17:37,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-26 21:17:37,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-26 21:17:37,080 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-26 21:17:37,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:37,081 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-26 21:17:37,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-26 21:17:37,081 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-26 21:17:37,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-26 21:17:37,081 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:37,081 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-09-26 21:17:37,082 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:37,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:37,082 INFO L82 PathProgramCache]: Analyzing trace with hash 2013898881, now seen corresponding path program 44 times [2018-09-26 21:17:37,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:37,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:37,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:37,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:37,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:37,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:38,485 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 21:17:38,486 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:38,486 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 21:17:38,508 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:17:38,532 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:17:38,533 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:38,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:38,543 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 21:17:38,563 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:38,563 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-26 21:17:38,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-26 21:17:38,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-26 21:17:38,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:17:38,564 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-09-26 21:17:38,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:38,620 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-26 21:17:38,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:17:38,620 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-09-26 21:17:38,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:38,621 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:17:38,621 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:17:38,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:17:38,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:17:38,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-26 21:17:38,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-26 21:17:38,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-26 21:17:38,624 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-26 21:17:38,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:38,625 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-26 21:17:38,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-26 21:17:38,625 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-26 21:17:38,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-26 21:17:38,625 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:38,626 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-26 21:17:38,626 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:38,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:38,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1993646104, now seen corresponding path program 45 times [2018-09-26 21:17:38,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:38,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:38,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:38,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:38,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:38,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:39,515 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 21:17:39,515 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:39,515 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 21:17:39,523 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:17:39,556 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-26 21:17:39,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:39,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:39,571 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 21:17:39,595 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:39,596 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-26 21:17:39,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:17:39,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:17:39,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:17:39,597 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-09-26 21:17:39,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:39,925 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-26 21:17:39,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-26 21:17:39,926 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-09-26 21:17:39,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:39,926 INFO L225 Difference]: With dead ends: 52 [2018-09-26 21:17:39,926 INFO L226 Difference]: Without dead ends: 50 [2018-09-26 21:17:39,927 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:17:39,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-26 21:17:39,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-26 21:17:39,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-26 21:17:39,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-26 21:17:39,929 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-26 21:17:39,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:39,930 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-26 21:17:39,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:17:39,930 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-26 21:17:39,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-26 21:17:39,930 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:39,930 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-09-26 21:17:39,931 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:39,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:39,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1673489055, now seen corresponding path program 46 times [2018-09-26 21:17:39,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:39,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:39,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:39,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:39,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:39,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:41,324 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 21:17:41,324 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:41,324 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 21:17:41,331 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:17:41,358 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:17:41,359 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:41,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:41,372 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 21:17:41,399 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:41,399 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-26 21:17:41,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-26 21:17:41,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-26 21:17:41,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:17:41,400 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-09-26 21:17:41,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:41,473 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-26 21:17:41,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:17:41,473 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-09-26 21:17:41,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:41,474 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:17:41,474 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:17:41,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:17:41,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:17:41,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-26 21:17:41,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-26 21:17:41,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-26 21:17:41,477 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-26 21:17:41,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:41,478 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-26 21:17:41,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-26 21:17:41,478 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-26 21:17:41,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-26 21:17:41,478 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:41,478 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-26 21:17:41,478 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:41,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:41,479 INFO L82 PathProgramCache]: Analyzing trace with hash -338555128, now seen corresponding path program 47 times [2018-09-26 21:17:41,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:41,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:41,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:41,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:41,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:42,536 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 21:17:42,536 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:42,536 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 21:17:42,544 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:17:42,581 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-26 21:17:42,581 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:42,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:42,594 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 21:17:42,614 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:42,614 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-26 21:17:42,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:17:42,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:17:42,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:17:42,615 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-09-26 21:17:42,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:42,715 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-26 21:17:42,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:17:42,715 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-09-26 21:17:42,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:42,716 INFO L225 Difference]: With dead ends: 54 [2018-09-26 21:17:42,716 INFO L226 Difference]: Without dead ends: 52 [2018-09-26 21:17:42,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:17:42,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-26 21:17:42,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-26 21:17:42,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-26 21:17:42,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-26 21:17:42,720 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-26 21:17:42,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:42,720 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-26 21:17:42,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:17:42,720 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-26 21:17:42,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-26 21:17:42,721 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:42,721 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-09-26 21:17:42,721 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:42,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:42,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1905276351, now seen corresponding path program 48 times [2018-09-26 21:17:42,722 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:42,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:42,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:42,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:42,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:42,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:44,126 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 21:17:44,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:44,126 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 21:17:44,133 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:17:44,182 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-26 21:17:44,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:44,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:44,197 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 21:17:44,219 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:44,219 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-26 21:17:44,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-26 21:17:44,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-26 21:17:44,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-26 21:17:44,220 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-09-26 21:17:44,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:44,333 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-26 21:17:44,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:17:44,334 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-09-26 21:17:44,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:44,335 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:17:44,335 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:17:44,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-26 21:17:44,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:17:44,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-26 21:17:44,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-26 21:17:44,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-26 21:17:44,339 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-26 21:17:44,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:44,339 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-26 21:17:44,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-26 21:17:44,339 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-26 21:17:44,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-26 21:17:44,340 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:44,340 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-26 21:17:44,340 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:44,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:44,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1065973288, now seen corresponding path program 49 times [2018-09-26 21:17:44,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:44,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:44,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:44,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:44,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:45,349 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 21:17:45,349 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:45,350 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 21:17:45,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:45,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:45,399 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 21:17:45,425 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:45,425 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-26 21:17:45,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-26 21:17:45,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-26 21:17:45,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:17:45,426 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-09-26 21:17:45,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:45,524 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-26 21:17:45,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-26 21:17:45,525 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-09-26 21:17:45,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:45,526 INFO L225 Difference]: With dead ends: 56 [2018-09-26 21:17:45,526 INFO L226 Difference]: Without dead ends: 54 [2018-09-26 21:17:45,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:17:45,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-26 21:17:45,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-26 21:17:45,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-26 21:17:45,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-26 21:17:45,530 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-26 21:17:45,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:45,531 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-26 21:17:45,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-26 21:17:45,531 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-26 21:17:45,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-26 21:17:45,531 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:45,531 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-09-26 21:17:45,531 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:45,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:45,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1314568415, now seen corresponding path program 50 times [2018-09-26 21:17:45,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:45,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:45,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:45,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:45,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:45,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:46,562 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 21:17:46,562 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:46,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:17:46,570 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:17:46,600 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:17:46,601 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:46,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:46,615 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 21:17:46,643 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:46,644 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-26 21:17:46,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-26 21:17:46,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-26 21:17:46,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:17:46,645 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-09-26 21:17:46,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:46,758 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-26 21:17:46,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:17:46,759 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-09-26 21:17:46,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:46,760 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:17:46,760 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:17:46,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:17:46,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:17:46,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-26 21:17:46,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-26 21:17:46,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-26 21:17:46,763 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-26 21:17:46,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:46,763 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-26 21:17:46,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-26 21:17:46,763 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-26 21:17:46,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-26 21:17:46,764 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:46,764 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-26 21:17:46,764 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:46,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:46,764 INFO L82 PathProgramCache]: Analyzing trace with hash -2096917176, now seen corresponding path program 51 times [2018-09-26 21:17:46,765 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:46,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:46,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:46,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:46,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:48,294 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 21:17:48,294 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:48,294 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:17:48,301 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:17:48,351 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-26 21:17:48,351 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:48,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:48,371 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 21:17:48,403 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:48,403 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-26 21:17:48,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-26 21:17:48,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-26 21:17:48,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:17:48,405 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-09-26 21:17:48,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:48,622 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-26 21:17:48,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-26 21:17:48,622 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-09-26 21:17:48,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:48,623 INFO L225 Difference]: With dead ends: 58 [2018-09-26 21:17:48,623 INFO L226 Difference]: Without dead ends: 56 [2018-09-26 21:17:48,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:17:48,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-26 21:17:48,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-26 21:17:48,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-26 21:17:48,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-26 21:17:48,625 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-26 21:17:48,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:48,626 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-26 21:17:48,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-26 21:17:48,626 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-26 21:17:48,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-26 21:17:48,626 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:48,627 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-09-26 21:17:48,627 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:48,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:48,627 INFO L82 PathProgramCache]: Analyzing trace with hash -579924991, now seen corresponding path program 52 times [2018-09-26 21:17:48,627 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:48,627 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:48,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:48,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:48,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:48,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:49,758 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 21:17:49,759 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:49,759 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 21:17:49,766 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:17:49,798 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:17:49,798 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:49,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:49,813 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 21:17:49,836 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:49,836 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-26 21:17:49,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-26 21:17:49,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-26 21:17:49,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:17:49,837 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-09-26 21:17:49,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:49,959 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-26 21:17:49,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:17:49,960 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-09-26 21:17:49,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:49,961 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:17:49,961 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:17:49,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:17:49,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:17:49,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-26 21:17:49,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-26 21:17:49,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-26 21:17:49,965 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-26 21:17:49,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:49,965 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-26 21:17:49,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-26 21:17:49,965 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-26 21:17:49,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-26 21:17:49,966 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:49,966 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-26 21:17:49,966 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:49,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:49,966 INFO L82 PathProgramCache]: Analyzing trace with hash -797807512, now seen corresponding path program 53 times [2018-09-26 21:17:49,967 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:49,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:49,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:49,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:49,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:49,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:51,119 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 21:17:51,120 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:51,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:17:51,127 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:17:51,168 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-26 21:17:51,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:51,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:51,180 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 21:17:51,200 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:51,201 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-26 21:17:51,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-26 21:17:51,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-26 21:17:51,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:17:51,202 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-09-26 21:17:51,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:51,277 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-26 21:17:51,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-26 21:17:51,277 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-09-26 21:17:51,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:51,278 INFO L225 Difference]: With dead ends: 60 [2018-09-26 21:17:51,279 INFO L226 Difference]: Without dead ends: 58 [2018-09-26 21:17:51,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:17:51,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-26 21:17:51,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-26 21:17:51,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-26 21:17:51,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-26 21:17:51,281 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-26 21:17:51,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:51,281 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-26 21:17:51,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-26 21:17:51,281 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-26 21:17:51,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-26 21:17:51,282 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:51,282 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-09-26 21:17:51,282 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:51,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:51,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1037768929, now seen corresponding path program 54 times [2018-09-26 21:17:51,282 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:51,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:51,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:51,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:51,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:51,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:52,423 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 21:17:52,423 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:52,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:17:52,431 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:17:52,471 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-26 21:17:52,471 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:52,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:52,486 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 21:17:52,515 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:52,515 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-26 21:17:52,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-26 21:17:52,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-26 21:17:52,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-26 21:17:52,517 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-09-26 21:17:52,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:52,672 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-26 21:17:52,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-26 21:17:52,673 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-09-26 21:17:52,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:52,674 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:17:52,674 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:17:52,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-26 21:17:52,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:17:52,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-26 21:17:52,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-26 21:17:52,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-26 21:17:52,676 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-26 21:17:52,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:52,676 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-26 21:17:52,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-26 21:17:52,676 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-26 21:17:52,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-26 21:17:52,677 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:52,677 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-26 21:17:52,677 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:52,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:52,677 INFO L82 PathProgramCache]: Analyzing trace with hash 2106063752, now seen corresponding path program 55 times [2018-09-26 21:17:52,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:52,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:52,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:52,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:52,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:52,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:54,330 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 21:17:54,331 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:54,331 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:17:54,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:54,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:54,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:54,385 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 21:17:54,404 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:54,405 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-26 21:17:54,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-26 21:17:54,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-26 21:17:54,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:17:54,406 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-09-26 21:17:54,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:54,519 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-26 21:17:54,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-26 21:17:54,519 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-09-26 21:17:54,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:54,520 INFO L225 Difference]: With dead ends: 62 [2018-09-26 21:17:54,520 INFO L226 Difference]: Without dead ends: 60 [2018-09-26 21:17:54,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:17:54,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-26 21:17:54,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-26 21:17:54,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-26 21:17:54,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-26 21:17:54,525 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-26 21:17:54,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:54,525 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-26 21:17:54,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-26 21:17:54,526 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-26 21:17:54,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-26 21:17:54,526 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:54,526 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-09-26 21:17:54,526 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:54,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:54,527 INFO L82 PathProgramCache]: Analyzing trace with hash 863464897, now seen corresponding path program 56 times [2018-09-26 21:17:54,527 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:54,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:54,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:54,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:17:54,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:54,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:55,863 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 21:17:55,863 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:55,863 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:17:55,874 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:17:55,905 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:17:55,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:55,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:55,920 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 21:17:55,949 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:55,949 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-26 21:17:55,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-26 21:17:55,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-26 21:17:55,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:17:55,950 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-09-26 21:17:56,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:56,237 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-26 21:17:56,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-26 21:17:56,237 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-09-26 21:17:56,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:56,238 INFO L225 Difference]: With dead ends: 63 [2018-09-26 21:17:56,238 INFO L226 Difference]: Without dead ends: 61 [2018-09-26 21:17:56,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:17:56,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-26 21:17:56,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-26 21:17:56,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-26 21:17:56,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-26 21:17:56,242 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-26 21:17:56,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:56,242 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-26 21:17:56,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-26 21:17:56,242 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-26 21:17:56,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-26 21:17:56,243 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:56,243 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-26 21:17:56,243 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:56,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:56,243 INFO L82 PathProgramCache]: Analyzing trace with hash 997606056, now seen corresponding path program 57 times [2018-09-26 21:17:56,243 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:56,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:56,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:56,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:56,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:57,688 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 21:17:57,688 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:57,689 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 21:17:57,697 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:17:57,741 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-26 21:17:57,741 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:57,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:57,757 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 21:17:57,786 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:57,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-26 21:17:57,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-26 21:17:57,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-26 21:17:57,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:17:57,787 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-09-26 21:17:57,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:57,902 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-26 21:17:57,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-26 21:17:57,902 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-09-26 21:17:57,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:57,903 INFO L225 Difference]: With dead ends: 64 [2018-09-26 21:17:57,903 INFO L226 Difference]: Without dead ends: 62 [2018-09-26 21:17:57,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:17:57,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-26 21:17:57,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-26 21:17:57,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-26 21:17:57,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-26 21:17:57,907 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-26 21:17:57,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:57,907 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-26 21:17:57,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-26 21:17:57,908 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-26 21:17:57,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-26 21:17:57,908 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:57,908 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-09-26 21:17:57,909 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:57,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:57,909 INFO L82 PathProgramCache]: Analyzing trace with hash 861014689, now seen corresponding path program 58 times [2018-09-26 21:17:57,909 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:57,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:57,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:57,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:57,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:57,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:17:59,787 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 21:17:59,787 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:17:59,787 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 21:17:59,795 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:17:59,833 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:17:59,833 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:17:59,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:17:59,847 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 21:17:59,867 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:17:59,867 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-26 21:17:59,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-26 21:17:59,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-26 21:17:59,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-26 21:17:59,869 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-09-26 21:17:59,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:17:59,980 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-26 21:17:59,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-26 21:17:59,980 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-09-26 21:17:59,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:17:59,981 INFO L225 Difference]: With dead ends: 65 [2018-09-26 21:17:59,981 INFO L226 Difference]: Without dead ends: 63 [2018-09-26 21:17:59,982 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-26 21:17:59,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-26 21:17:59,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-26 21:17:59,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-26 21:17:59,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-26 21:17:59,985 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-26 21:17:59,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:17:59,985 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-26 21:17:59,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-26 21:17:59,985 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-26 21:17:59,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-26 21:17:59,985 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:17:59,985 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-26 21:17:59,986 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:17:59,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:17:59,986 INFO L82 PathProgramCache]: Analyzing trace with hash 921649608, now seen corresponding path program 59 times [2018-09-26 21:17:59,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:17:59,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:17:59,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:59,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:17:59,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:17:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:01,665 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 21:18:01,665 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:01,665 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:18:01,672 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:18:01,720 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-26 21:18:01,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:01,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:01,735 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 21:18:01,755 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:01,755 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-26 21:18:01,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-26 21:18:01,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-26 21:18:01,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:18:01,757 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-09-26 21:18:01,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:01,877 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-26 21:18:01,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-26 21:18:01,878 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-09-26 21:18:01,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:01,879 INFO L225 Difference]: With dead ends: 66 [2018-09-26 21:18:01,879 INFO L226 Difference]: Without dead ends: 64 [2018-09-26 21:18:01,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:18:01,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-26 21:18:01,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-26 21:18:01,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-26 21:18:01,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-26 21:18:01,882 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-26 21:18:01,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:01,882 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-26 21:18:01,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-26 21:18:01,883 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-26 21:18:01,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-26 21:18:01,883 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:01,883 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-09-26 21:18:01,883 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:01,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:01,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1493635199, now seen corresponding path program 60 times [2018-09-26 21:18:01,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:01,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:01,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:01,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:01,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:01,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:03,435 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 21:18:03,435 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:03,435 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:18:03,444 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:18:03,488 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-26 21:18:03,489 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:03,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:03,506 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 21:18:03,536 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:03,536 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-26 21:18:03,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-26 21:18:03,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-26 21:18:03,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-26 21:18:03,538 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-09-26 21:18:03,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:03,701 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-26 21:18:03,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-26 21:18:03,701 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-09-26 21:18:03,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:03,702 INFO L225 Difference]: With dead ends: 67 [2018-09-26 21:18:03,702 INFO L226 Difference]: Without dead ends: 65 [2018-09-26 21:18:03,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-26 21:18:03,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-26 21:18:03,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-26 21:18:03,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-26 21:18:03,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-26 21:18:03,704 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-26 21:18:03,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:03,704 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-26 21:18:03,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-26 21:18:03,704 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-26 21:18:03,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-26 21:18:03,704 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:03,704 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-26 21:18:03,705 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:03,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:03,705 INFO L82 PathProgramCache]: Analyzing trace with hash 941947112, now seen corresponding path program 61 times [2018-09-26 21:18:03,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:03,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:03,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:03,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:03,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:03,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:05,171 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 21:18:05,171 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:05,171 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 21:18:05,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:18:05,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:05,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:05,233 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 21:18:05,266 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:05,266 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-26 21:18:05,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-26 21:18:05,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-26 21:18:05,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-26 21:18:05,268 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-09-26 21:18:05,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:05,409 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-26 21:18:05,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-26 21:18:05,409 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-09-26 21:18:05,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:05,410 INFO L225 Difference]: With dead ends: 68 [2018-09-26 21:18:05,410 INFO L226 Difference]: Without dead ends: 66 [2018-09-26 21:18:05,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-26 21:18:05,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-26 21:18:05,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-26 21:18:05,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-26 21:18:05,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-26 21:18:05,414 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-26 21:18:05,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:05,414 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-26 21:18:05,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-26 21:18:05,414 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-26 21:18:05,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-26 21:18:05,414 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:05,414 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-09-26 21:18:05,415 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:05,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:05,415 INFO L82 PathProgramCache]: Analyzing trace with hash -864412575, now seen corresponding path program 62 times [2018-09-26 21:18:05,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:05,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:05,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:05,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:18:05,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:05,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:07,007 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 21:18:07,008 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:07,008 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 21:18:07,017 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:18:07,050 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:18:07,050 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:07,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:07,064 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 21:18:07,092 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:07,093 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-26 21:18:07,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-26 21:18:07,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-26 21:18:07,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-26 21:18:07,094 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-09-26 21:18:07,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:07,252 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-26 21:18:07,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-26 21:18:07,253 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-09-26 21:18:07,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:07,254 INFO L225 Difference]: With dead ends: 69 [2018-09-26 21:18:07,254 INFO L226 Difference]: Without dead ends: 67 [2018-09-26 21:18:07,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-26 21:18:07,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-26 21:18:07,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-26 21:18:07,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-26 21:18:07,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-26 21:18:07,257 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-26 21:18:07,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:07,257 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-26 21:18:07,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-26 21:18:07,258 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-26 21:18:07,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-26 21:18:07,258 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:07,258 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-26 21:18:07,258 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:07,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:07,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1026988024, now seen corresponding path program 63 times [2018-09-26 21:18:07,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:07,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:07,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:07,260 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:07,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:09,130 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 21:18:09,130 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:09,130 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 21:18:09,145 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:18:09,195 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-26 21:18:09,196 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:09,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:09,210 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 21:18:09,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:09,230 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-26 21:18:09,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-26 21:18:09,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-26 21:18:09,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-26 21:18:09,231 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-09-26 21:18:09,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:09,339 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-26 21:18:09,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-26 21:18:09,347 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-09-26 21:18:09,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:09,347 INFO L225 Difference]: With dead ends: 70 [2018-09-26 21:18:09,347 INFO L226 Difference]: Without dead ends: 68 [2018-09-26 21:18:09,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-26 21:18:09,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-26 21:18:09,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-26 21:18:09,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-26 21:18:09,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-26 21:18:09,351 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-26 21:18:09,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:09,351 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-26 21:18:09,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-26 21:18:09,351 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-26 21:18:09,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-26 21:18:09,352 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:09,352 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-09-26 21:18:09,352 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:09,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:09,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1771859647, now seen corresponding path program 64 times [2018-09-26 21:18:09,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:09,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:09,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:09,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:09,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:09,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:10,968 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 21:18:10,969 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:10,969 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 21:18:10,978 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:18:11,015 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:18:11,016 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:11,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:11,032 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 21:18:11,062 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:11,062 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-26 21:18:11,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-26 21:18:11,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-26 21:18:11,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-26 21:18:11,063 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-09-26 21:18:11,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:11,250 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-26 21:18:11,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-26 21:18:11,251 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-09-26 21:18:11,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:11,251 INFO L225 Difference]: With dead ends: 71 [2018-09-26 21:18:11,252 INFO L226 Difference]: Without dead ends: 69 [2018-09-26 21:18:11,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-26 21:18:11,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-26 21:18:11,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-26 21:18:11,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-26 21:18:11,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-26 21:18:11,256 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-26 21:18:11,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:11,256 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-26 21:18:11,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-26 21:18:11,256 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-26 21:18:11,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-26 21:18:11,257 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:11,257 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-26 21:18:11,257 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:11,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:11,257 INFO L82 PathProgramCache]: Analyzing trace with hash 906923816, now seen corresponding path program 65 times [2018-09-26 21:18:11,257 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:11,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:11,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:11,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:11,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:11,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:12,948 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 21:18:12,948 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:12,948 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 21:18:12,955 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:18:13,010 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-26 21:18:13,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:13,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:13,028 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 21:18:13,056 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:13,056 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-26 21:18:13,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-26 21:18:13,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-26 21:18:13,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:18:13,057 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-09-26 21:18:13,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:13,358 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-26 21:18:13,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-26 21:18:13,358 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-09-26 21:18:13,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:13,359 INFO L225 Difference]: With dead ends: 72 [2018-09-26 21:18:13,359 INFO L226 Difference]: Without dead ends: 70 [2018-09-26 21:18:13,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:18:13,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-26 21:18:13,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-26 21:18:13,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-26 21:18:13,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-26 21:18:13,363 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-26 21:18:13,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:13,363 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-26 21:18:13,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-26 21:18:13,363 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-26 21:18:13,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-26 21:18:13,364 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:13,364 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-09-26 21:18:13,364 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:13,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:13,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1950134751, now seen corresponding path program 66 times [2018-09-26 21:18:13,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:13,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:13,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:13,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:13,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:13,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:15,413 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 21:18:15,413 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:15,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:18:15,420 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:18:15,472 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-26 21:18:15,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:15,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:15,488 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 21:18:15,509 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:15,509 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-26 21:18:15,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-26 21:18:15,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-26 21:18:15,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-26 21:18:15,511 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-09-26 21:18:15,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:15,604 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-26 21:18:15,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-26 21:18:15,605 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-09-26 21:18:15,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:15,606 INFO L225 Difference]: With dead ends: 73 [2018-09-26 21:18:15,606 INFO L226 Difference]: Without dead ends: 71 [2018-09-26 21:18:15,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-26 21:18:15,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-26 21:18:15,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-26 21:18:15,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-26 21:18:15,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-26 21:18:15,609 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-26 21:18:15,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:15,610 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-26 21:18:15,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-26 21:18:15,610 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-26 21:18:15,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-26 21:18:15,610 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:15,611 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-26 21:18:15,611 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:15,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:15,611 INFO L82 PathProgramCache]: Analyzing trace with hash -324637112, now seen corresponding path program 67 times [2018-09-26 21:18:15,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:15,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:15,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:15,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:15,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:17,330 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 21:18:17,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:17,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:18:17,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:18:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:17,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:17,396 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 21:18:17,424 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:17,424 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-26 21:18:17,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-26 21:18:17,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-26 21:18:17,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-26 21:18:17,425 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-09-26 21:18:17,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:17,549 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-26 21:18:17,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-26 21:18:17,550 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-09-26 21:18:17,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:17,551 INFO L225 Difference]: With dead ends: 74 [2018-09-26 21:18:17,551 INFO L226 Difference]: Without dead ends: 72 [2018-09-26 21:18:17,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-26 21:18:17,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-26 21:18:17,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-26 21:18:17,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-26 21:18:17,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-26 21:18:17,555 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-26 21:18:17,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:17,555 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-26 21:18:17,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-26 21:18:17,555 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-26 21:18:17,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-26 21:18:17,555 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:17,556 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-09-26 21:18:17,556 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:17,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:17,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1473817855, now seen corresponding path program 68 times [2018-09-26 21:18:17,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:17,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:17,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:17,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:18:17,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:17,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:19,731 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 21:18:19,731 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:19,731 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:18:19,739 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:18:19,778 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:18:19,778 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:19,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:19,792 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 21:18:19,813 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:19,813 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-26 21:18:19,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-26 21:18:19,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-26 21:18:19,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-26 21:18:19,815 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-09-26 21:18:19,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:19,994 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-26 21:18:19,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-26 21:18:19,995 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-09-26 21:18:19,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:19,996 INFO L225 Difference]: With dead ends: 75 [2018-09-26 21:18:19,996 INFO L226 Difference]: Without dead ends: 73 [2018-09-26 21:18:19,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-26 21:18:19,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-26 21:18:19,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-26 21:18:19,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-26 21:18:19,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-26 21:18:20,000 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-26 21:18:20,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:20,000 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-26 21:18:20,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-26 21:18:20,000 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-26 21:18:20,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-26 21:18:20,001 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:20,001 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-26 21:18:20,001 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:20,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:20,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1556284776, now seen corresponding path program 69 times [2018-09-26 21:18:20,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:20,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:20,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:20,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:20,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:21,862 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 21:18:21,862 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:21,862 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 21:18:21,869 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:18:21,953 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-26 21:18:21,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:21,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:21,973 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 21:18:22,003 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:22,003 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-26 21:18:22,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-26 21:18:22,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-26 21:18:22,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-26 21:18:22,004 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-09-26 21:18:22,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:22,354 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-26 21:18:22,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-26 21:18:22,354 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-09-26 21:18:22,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:22,355 INFO L225 Difference]: With dead ends: 76 [2018-09-26 21:18:22,355 INFO L226 Difference]: Without dead ends: 74 [2018-09-26 21:18:22,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-26 21:18:22,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-26 21:18:22,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-26 21:18:22,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-26 21:18:22,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-26 21:18:22,361 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-26 21:18:22,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:22,362 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-26 21:18:22,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-26 21:18:22,362 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-26 21:18:22,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-26 21:18:22,362 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:22,362 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-09-26 21:18:22,363 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:22,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:22,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1000185825, now seen corresponding path program 70 times [2018-09-26 21:18:22,363 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:22,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:22,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:22,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:22,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:22,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:24,930 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 21:18:24,931 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:24,931 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 21:18:24,942 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:18:25,016 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:18:25,017 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:25,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:25,038 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 21:18:25,073 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:25,073 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-26 21:18:25,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-26 21:18:25,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-26 21:18:25,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-26 21:18:25,075 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-09-26 21:18:25,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:25,368 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-26 21:18:25,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-26 21:18:25,369 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-09-26 21:18:25,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:25,370 INFO L225 Difference]: With dead ends: 77 [2018-09-26 21:18:25,370 INFO L226 Difference]: Without dead ends: 75 [2018-09-26 21:18:25,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-26 21:18:25,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-26 21:18:25,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-26 21:18:25,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-26 21:18:25,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-26 21:18:25,377 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-26 21:18:25,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:25,377 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-26 21:18:25,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-26 21:18:25,377 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-26 21:18:25,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-26 21:18:25,377 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:25,378 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-26 21:18:25,378 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:25,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:25,378 INFO L82 PathProgramCache]: Analyzing trace with hash 940987528, now seen corresponding path program 71 times [2018-09-26 21:18:25,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:25,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:25,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:25,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:25,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:25,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:28,849 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 21:18:28,849 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:28,849 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 21:18:28,856 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:18:28,915 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-26 21:18:28,915 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:28,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:28,935 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 21:18:28,965 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:28,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-26 21:18:28,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-26 21:18:28,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-26 21:18:28,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-26 21:18:28,967 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-09-26 21:18:29,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:29,105 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-26 21:18:29,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-26 21:18:29,105 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-09-26 21:18:29,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:29,106 INFO L225 Difference]: With dead ends: 78 [2018-09-26 21:18:29,106 INFO L226 Difference]: Without dead ends: 76 [2018-09-26 21:18:29,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-26 21:18:29,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-26 21:18:29,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-26 21:18:29,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-26 21:18:29,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-26 21:18:29,114 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-26 21:18:29,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:29,115 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-26 21:18:29,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-26 21:18:29,115 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-26 21:18:29,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-26 21:18:29,115 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:29,115 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-09-26 21:18:29,116 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:29,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:29,116 INFO L82 PathProgramCache]: Analyzing trace with hash -894159679, now seen corresponding path program 72 times [2018-09-26 21:18:29,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:29,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:29,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:29,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:29,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:29,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:31,281 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 21:18:31,281 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:31,282 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:18:31,288 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:18:31,347 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-26 21:18:31,348 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:31,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:31,368 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 21:18:31,396 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:31,397 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-26 21:18:31,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-26 21:18:31,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-26 21:18:31,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-26 21:18:31,398 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-09-26 21:18:31,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:31,511 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-26 21:18:31,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-26 21:18:31,512 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-09-26 21:18:31,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:31,513 INFO L225 Difference]: With dead ends: 79 [2018-09-26 21:18:31,513 INFO L226 Difference]: Without dead ends: 77 [2018-09-26 21:18:31,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-26 21:18:31,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-26 21:18:31,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-26 21:18:31,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-26 21:18:31,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-26 21:18:31,516 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-26 21:18:31,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:31,516 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-26 21:18:31,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-26 21:18:31,516 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-26 21:18:31,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-26 21:18:31,517 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:31,517 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-09-26 21:18:31,517 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:31,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:31,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1949148248, now seen corresponding path program 73 times [2018-09-26 21:18:31,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:31,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:31,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:31,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:31,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:31,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:34,786 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 21:18:34,786 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:34,786 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:18:34,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:18:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:34,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:34,848 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 21:18:34,868 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:34,869 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-26 21:18:34,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-26 21:18:34,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-26 21:18:34,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-26 21:18:34,870 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-09-26 21:18:35,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:35,017 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-26 21:18:35,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-26 21:18:35,017 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-09-26 21:18:35,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:35,018 INFO L225 Difference]: With dead ends: 80 [2018-09-26 21:18:35,018 INFO L226 Difference]: Without dead ends: 78 [2018-09-26 21:18:35,018 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-26 21:18:35,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-26 21:18:35,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-26 21:18:35,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-26 21:18:35,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-26 21:18:35,021 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-26 21:18:35,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:35,021 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-26 21:18:35,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-26 21:18:35,021 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-26 21:18:35,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-26 21:18:35,022 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:35,022 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-09-26 21:18:35,022 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:35,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:35,022 INFO L82 PathProgramCache]: Analyzing trace with hash -294055519, now seen corresponding path program 74 times [2018-09-26 21:18:35,022 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:35,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:35,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:35,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:18:35,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:37,085 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 21:18:37,085 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:37,085 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 21:18:37,093 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:18:37,132 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:18:37,133 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:37,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:37,153 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 21:18:37,177 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:37,178 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-26 21:18:37,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-26 21:18:37,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-26 21:18:37,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-26 21:18:37,179 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-09-26 21:18:37,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:37,347 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-26 21:18:37,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-26 21:18:37,347 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-09-26 21:18:37,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:37,348 INFO L225 Difference]: With dead ends: 81 [2018-09-26 21:18:37,348 INFO L226 Difference]: Without dead ends: 79 [2018-09-26 21:18:37,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-26 21:18:37,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-26 21:18:37,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-26 21:18:37,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-26 21:18:37,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-26 21:18:37,352 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-26 21:18:37,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:37,353 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-26 21:18:37,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-26 21:18:37,353 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-26 21:18:37,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-26 21:18:37,353 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:37,353 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-09-26 21:18:37,353 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:37,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:37,354 INFO L82 PathProgramCache]: Analyzing trace with hash -525788472, now seen corresponding path program 75 times [2018-09-26 21:18:37,354 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:37,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:37,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:37,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:37,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:37,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:40,397 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 21:18:40,397 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:40,398 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 21:18:40,405 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:18:40,467 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-26 21:18:40,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:40,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:40,487 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 21:18:40,508 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:40,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-26 21:18:40,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-26 21:18:40,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-26 21:18:40,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-26 21:18:40,509 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-09-26 21:18:40,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:40,652 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-26 21:18:40,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-26 21:18:40,653 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-09-26 21:18:40,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:40,654 INFO L225 Difference]: With dead ends: 82 [2018-09-26 21:18:40,654 INFO L226 Difference]: Without dead ends: 80 [2018-09-26 21:18:40,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-26 21:18:40,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-26 21:18:40,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-26 21:18:40,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-26 21:18:40,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-26 21:18:40,657 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-26 21:18:40,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:40,657 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-26 21:18:40,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-26 21:18:40,657 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-26 21:18:40,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-26 21:18:40,657 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:40,657 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-09-26 21:18:40,659 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:40,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:40,659 INFO L82 PathProgramCache]: Analyzing trace with hash 880424577, now seen corresponding path program 76 times [2018-09-26 21:18:40,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:40,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:40,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:40,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:40,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:42,829 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 21:18:42,829 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:42,829 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:18:42,836 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:18:42,891 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:18:42,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:42,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:42,914 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 21:18:42,945 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:42,945 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-26 21:18:42,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-26 21:18:42,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-26 21:18:42,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-26 21:18:42,946 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-09-26 21:18:43,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:43,643 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-26 21:18:43,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-26 21:18:43,643 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-09-26 21:18:43,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:43,644 INFO L225 Difference]: With dead ends: 83 [2018-09-26 21:18:43,644 INFO L226 Difference]: Without dead ends: 81 [2018-09-26 21:18:43,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-26 21:18:43,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-26 21:18:43,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-26 21:18:43,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-26 21:18:43,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-26 21:18:43,647 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-26 21:18:43,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:43,648 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-26 21:18:43,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-26 21:18:43,648 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-26 21:18:43,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-26 21:18:43,648 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:43,649 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-09-26 21:18:43,649 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:43,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:43,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1523356136, now seen corresponding path program 77 times [2018-09-26 21:18:43,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:43,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:43,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:43,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:43,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:46,850 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 21:18:46,850 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:46,851 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 21:18:46,858 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:18:46,925 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-26 21:18:46,925 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:46,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:46,947 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 21:18:46,968 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:46,969 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-26 21:18:46,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-26 21:18:46,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-26 21:18:46,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-26 21:18:46,970 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-09-26 21:18:47,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:47,150 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-26 21:18:47,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-26 21:18:47,150 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-09-26 21:18:47,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:47,151 INFO L225 Difference]: With dead ends: 84 [2018-09-26 21:18:47,151 INFO L226 Difference]: Without dead ends: 82 [2018-09-26 21:18:47,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-26 21:18:47,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-26 21:18:47,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-26 21:18:47,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-26 21:18:47,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-26 21:18:47,153 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-26 21:18:47,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:47,153 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-26 21:18:47,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-26 21:18:47,154 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-26 21:18:47,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-26 21:18:47,154 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:47,154 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-09-26 21:18:47,154 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:47,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:47,155 INFO L82 PathProgramCache]: Analyzing trace with hash -20602015, now seen corresponding path program 78 times [2018-09-26 21:18:47,155 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:47,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:47,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:47,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:47,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:49,444 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 21:18:49,445 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:49,445 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:18:49,452 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:18:49,706 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-26 21:18:49,707 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:49,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:49,733 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 21:18:49,767 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:49,767 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-26 21:18:49,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-26 21:18:49,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-26 21:18:49,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-26 21:18:49,769 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-09-26 21:18:50,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:50,030 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-26 21:18:50,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-26 21:18:50,030 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-09-26 21:18:50,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:50,031 INFO L225 Difference]: With dead ends: 85 [2018-09-26 21:18:50,031 INFO L226 Difference]: Without dead ends: 83 [2018-09-26 21:18:50,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-26 21:18:50,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-26 21:18:50,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-26 21:18:50,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-26 21:18:50,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-26 21:18:50,034 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-26 21:18:50,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:50,035 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-26 21:18:50,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-26 21:18:50,035 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-26 21:18:50,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-26 21:18:50,035 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:50,035 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-09-26 21:18:50,035 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:50,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:50,036 INFO L82 PathProgramCache]: Analyzing trace with hash -638664440, now seen corresponding path program 79 times [2018-09-26 21:18:50,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:50,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:50,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:50,036 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:50,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:52,689 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 21:18:52,689 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:52,689 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 21:18:52,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:18:52,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:52,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:52,758 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 21:18:52,778 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:52,779 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-26 21:18:52,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-26 21:18:52,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-26 21:18:52,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-26 21:18:52,780 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-09-26 21:18:52,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:52,935 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-09-26 21:18:52,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-26 21:18:52,936 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-09-26 21:18:52,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:52,937 INFO L225 Difference]: With dead ends: 86 [2018-09-26 21:18:52,937 INFO L226 Difference]: Without dead ends: 84 [2018-09-26 21:18:52,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-26 21:18:52,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-26 21:18:52,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-26 21:18:52,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-26 21:18:52,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-26 21:18:52,940 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-26 21:18:52,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:52,941 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-26 21:18:52,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-26 21:18:52,941 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-26 21:18:52,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-26 21:18:52,941 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:52,941 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-09-26 21:18:52,942 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:52,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:52,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1676236865, now seen corresponding path program 80 times [2018-09-26 21:18:52,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:52,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:52,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:52,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:18:52,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:52,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:18:55,673 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 21:18:55,674 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:18:55,674 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 21:18:55,682 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:18:55,726 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:18:55,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:18:55,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:18:55,751 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 21:18:55,785 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:18:55,785 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-26 21:18:55,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-26 21:18:55,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-26 21:18:55,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-26 21:18:55,787 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-09-26 21:18:57,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:18:57,425 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-26 21:18:57,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-26 21:18:57,426 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-09-26 21:18:57,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:18:57,427 INFO L225 Difference]: With dead ends: 87 [2018-09-26 21:18:57,427 INFO L226 Difference]: Without dead ends: 85 [2018-09-26 21:18:57,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-26 21:18:57,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-26 21:18:57,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-26 21:18:57,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-26 21:18:57,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-26 21:18:57,429 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-09-26 21:18:57,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:18:57,429 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-26 21:18:57,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-26 21:18:57,430 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-26 21:18:57,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-26 21:18:57,430 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:18:57,430 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-09-26 21:18:57,430 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:18:57,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:18:57,431 INFO L82 PathProgramCache]: Analyzing trace with hash 423733288, now seen corresponding path program 81 times [2018-09-26 21:18:57,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:18:57,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:18:57,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:57,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:18:57,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:18:57,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:00,427 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 21:19:00,427 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:00,428 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 21:19:00,435 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:19:00,502 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-26 21:19:00,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:00,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:00,525 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 21:19:00,555 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:00,555 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-26 21:19:00,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-26 21:19:00,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-26 21:19:00,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-26 21:19:00,557 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-09-26 21:19:00,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:00,785 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-09-26 21:19:00,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-26 21:19:00,786 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-09-26 21:19:00,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:00,787 INFO L225 Difference]: With dead ends: 88 [2018-09-26 21:19:00,787 INFO L226 Difference]: Without dead ends: 86 [2018-09-26 21:19:00,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-26 21:19:00,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-26 21:19:00,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-26 21:19:00,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-26 21:19:00,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-26 21:19:00,790 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-09-26 21:19:00,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:00,791 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-26 21:19:00,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-26 21:19:00,791 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-26 21:19:00,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-26 21:19:00,791 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:00,791 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-09-26 21:19:00,791 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:00,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:00,792 INFO L82 PathProgramCache]: Analyzing trace with hash 250828065, now seen corresponding path program 82 times [2018-09-26 21:19:00,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:00,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:00,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:00,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:00,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:00,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:03,631 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 21:19:03,631 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:03,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:19:03,639 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:19:03,684 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:19:03,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:03,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:03,710 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 21:19:03,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:03,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-26 21:19:03,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-26 21:19:03,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-26 21:19:03,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-26 21:19:03,743 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-09-26 21:19:05,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:05,163 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-26 21:19:05,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-26 21:19:05,164 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-09-26 21:19:05,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:05,165 INFO L225 Difference]: With dead ends: 89 [2018-09-26 21:19:05,165 INFO L226 Difference]: Without dead ends: 87 [2018-09-26 21:19:05,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-26 21:19:05,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-26 21:19:05,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-26 21:19:05,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-26 21:19:05,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-26 21:19:05,168 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-09-26 21:19:05,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:05,168 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-26 21:19:05,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-26 21:19:05,168 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-26 21:19:05,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-26 21:19:05,169 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:05,169 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-09-26 21:19:05,169 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:05,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:05,169 INFO L82 PathProgramCache]: Analyzing trace with hash -814266552, now seen corresponding path program 83 times [2018-09-26 21:19:05,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:05,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:05,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:05,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:05,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:07,835 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 21:19:07,835 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:07,835 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 21:19:07,842 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:19:07,918 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-26 21:19:07,918 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:07,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:07,936 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 21:19:07,957 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:07,957 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-26 21:19:07,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-26 21:19:07,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-26 21:19:07,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-26 21:19:07,959 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-09-26 21:19:08,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:08,245 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-09-26 21:19:08,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-26 21:19:08,246 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-09-26 21:19:08,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:08,247 INFO L225 Difference]: With dead ends: 90 [2018-09-26 21:19:08,247 INFO L226 Difference]: Without dead ends: 88 [2018-09-26 21:19:08,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-26 21:19:08,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-26 21:19:08,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-26 21:19:08,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-26 21:19:08,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-26 21:19:08,251 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-09-26 21:19:08,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:08,252 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-26 21:19:08,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-26 21:19:08,252 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-26 21:19:08,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-26 21:19:08,252 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:08,252 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-09-26 21:19:08,253 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:08,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:08,253 INFO L82 PathProgramCache]: Analyzing trace with hash 527538689, now seen corresponding path program 84 times [2018-09-26 21:19:08,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:08,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:08,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:08,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:08,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:08,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:11,248 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 21:19:11,249 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:11,249 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 21:19:11,257 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:19:11,333 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-26 21:19:11,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:11,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:11,352 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 21:19:11,373 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:11,373 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-26 21:19:11,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-26 21:19:11,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-26 21:19:11,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-26 21:19:11,375 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-09-26 21:19:11,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:11,584 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-26 21:19:11,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-26 21:19:11,585 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-09-26 21:19:11,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:11,586 INFO L225 Difference]: With dead ends: 91 [2018-09-26 21:19:11,586 INFO L226 Difference]: Without dead ends: 89 [2018-09-26 21:19:11,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-26 21:19:11,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-26 21:19:11,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-26 21:19:11,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-26 21:19:11,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-26 21:19:11,590 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-09-26 21:19:11,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:11,591 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-26 21:19:11,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-26 21:19:11,591 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-26 21:19:11,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-26 21:19:11,591 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:11,592 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-09-26 21:19:11,592 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:11,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:11,592 INFO L82 PathProgramCache]: Analyzing trace with hash -826171800, now seen corresponding path program 85 times [2018-09-26 21:19:11,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:11,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:11,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:11,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:11,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:11,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:14,379 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 21:19:14,379 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:14,379 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:19:14,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:19:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:14,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:14,451 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 21:19:14,473 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:14,473 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-26 21:19:14,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-26 21:19:14,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-26 21:19:14,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-26 21:19:14,475 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-09-26 21:19:14,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:14,638 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-09-26 21:19:14,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-26 21:19:14,638 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-09-26 21:19:14,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:14,639 INFO L225 Difference]: With dead ends: 92 [2018-09-26 21:19:14,639 INFO L226 Difference]: Without dead ends: 90 [2018-09-26 21:19:14,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-26 21:19:14,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-26 21:19:14,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-26 21:19:14,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-26 21:19:14,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-26 21:19:14,643 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-09-26 21:19:14,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:14,643 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-26 21:19:14,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-26 21:19:14,643 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-26 21:19:14,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-26 21:19:14,644 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:14,644 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-09-26 21:19:14,644 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:14,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:14,645 INFO L82 PathProgramCache]: Analyzing trace with hash 158476001, now seen corresponding path program 86 times [2018-09-26 21:19:14,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:14,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:14,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:14,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:19:14,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:17,726 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 21:19:17,727 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:17,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:19:17,735 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:19:17,784 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:19:17,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:17,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:17,803 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 21:19:17,823 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:17,824 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-26 21:19:17,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-26 21:19:17,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-26 21:19:17,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-26 21:19:17,825 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-09-26 21:19:18,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:18,033 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-26 21:19:18,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-26 21:19:18,034 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-09-26 21:19:18,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:18,034 INFO L225 Difference]: With dead ends: 93 [2018-09-26 21:19:18,035 INFO L226 Difference]: Without dead ends: 91 [2018-09-26 21:19:18,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-26 21:19:18,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-26 21:19:18,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-26 21:19:18,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-26 21:19:18,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-26 21:19:18,037 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-09-26 21:19:18,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:18,037 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-26 21:19:18,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-26 21:19:18,037 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-26 21:19:18,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-26 21:19:18,037 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:18,038 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-09-26 21:19:18,038 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:18,038 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:18,038 INFO L82 PathProgramCache]: Analyzing trace with hash 617786760, now seen corresponding path program 87 times [2018-09-26 21:19:18,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:18,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:18,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:18,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:18,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:18,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:21,168 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 21:19:21,168 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:21,168 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 21:19:21,177 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:19:21,254 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-26 21:19:21,254 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:21,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:21,289 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 21:19:21,309 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:21,309 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-26 21:19:21,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-26 21:19:21,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-26 21:19:21,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-26 21:19:21,310 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-09-26 21:19:21,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:21,521 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-09-26 21:19:21,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-26 21:19:21,521 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-09-26 21:19:21,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:21,522 INFO L225 Difference]: With dead ends: 94 [2018-09-26 21:19:21,522 INFO L226 Difference]: Without dead ends: 92 [2018-09-26 21:19:21,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-26 21:19:21,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-26 21:19:21,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-26 21:19:21,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-26 21:19:21,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-26 21:19:21,526 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-09-26 21:19:21,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:21,526 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-26 21:19:21,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-26 21:19:21,526 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-26 21:19:21,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-26 21:19:21,527 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:21,527 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-09-26 21:19:21,527 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:21,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:21,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1971518401, now seen corresponding path program 88 times [2018-09-26 21:19:21,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:21,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:21,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:21,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:21,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:24,400 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 21:19:24,400 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:24,400 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 21:19:24,407 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:19:24,458 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:19:24,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:24,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:24,482 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 21:19:24,509 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:24,509 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-26 21:19:24,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-26 21:19:24,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-26 21:19:24,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-26 21:19:24,511 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-09-26 21:19:24,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:24,653 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-26 21:19:24,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-26 21:19:24,654 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-09-26 21:19:24,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:24,655 INFO L225 Difference]: With dead ends: 95 [2018-09-26 21:19:24,655 INFO L226 Difference]: Without dead ends: 93 [2018-09-26 21:19:24,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-26 21:19:24,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-26 21:19:24,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-26 21:19:24,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-26 21:19:24,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-26 21:19:24,658 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-09-26 21:19:24,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:24,658 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-26 21:19:24,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-26 21:19:24,659 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-26 21:19:24,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-26 21:19:24,659 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:24,659 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-09-26 21:19:24,659 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:24,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:24,660 INFO L82 PathProgramCache]: Analyzing trace with hash 987526312, now seen corresponding path program 89 times [2018-09-26 21:19:24,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:24,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:24,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:24,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:24,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:27,941 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 21:19:27,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:27,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:19:27,949 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:19:28,028 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-26 21:19:28,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:28,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:28,047 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 21:19:28,067 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:28,067 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-26 21:19:28,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-26 21:19:28,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-26 21:19:28,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-26 21:19:28,069 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-09-26 21:19:28,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:28,319 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-09-26 21:19:28,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-26 21:19:28,319 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-09-26 21:19:28,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:28,320 INFO L225 Difference]: With dead ends: 96 [2018-09-26 21:19:28,320 INFO L226 Difference]: Without dead ends: 94 [2018-09-26 21:19:28,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-26 21:19:28,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-26 21:19:28,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-26 21:19:28,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-26 21:19:28,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-26 21:19:28,322 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-09-26 21:19:28,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:28,322 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-26 21:19:28,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-26 21:19:28,323 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-26 21:19:28,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-26 21:19:28,323 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:28,323 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-09-26 21:19:28,323 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:28,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:28,323 INFO L82 PathProgramCache]: Analyzing trace with hash 548542625, now seen corresponding path program 90 times [2018-09-26 21:19:28,324 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:28,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:28,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:28,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:28,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:31,556 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 21:19:31,556 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:31,556 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 21:19:31,563 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:19:31,638 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-26 21:19:31,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:31,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:31,657 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 21:19:31,677 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:31,677 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-26 21:19:31,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-26 21:19:31,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-26 21:19:31,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-26 21:19:31,679 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-09-26 21:19:31,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:31,909 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-26 21:19:31,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-26 21:19:31,909 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-09-26 21:19:31,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:31,910 INFO L225 Difference]: With dead ends: 97 [2018-09-26 21:19:31,911 INFO L226 Difference]: Without dead ends: 95 [2018-09-26 21:19:31,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-26 21:19:31,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-26 21:19:31,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-26 21:19:31,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-26 21:19:31,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-26 21:19:31,915 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-09-26 21:19:31,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:31,915 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-26 21:19:31,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-26 21:19:31,915 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-26 21:19:31,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-26 21:19:31,916 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:31,916 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-09-26 21:19:31,916 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:31,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:31,916 INFO L82 PathProgramCache]: Analyzing trace with hash -175049784, now seen corresponding path program 91 times [2018-09-26 21:19:31,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:31,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:31,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:31,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:31,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:31,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:34,939 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 21:19:34,940 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:34,940 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:19:34,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:19:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:35,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:35,025 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 21:19:35,053 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:35,053 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-26 21:19:35,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-26 21:19:35,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-26 21:19:35,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-26 21:19:35,055 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-09-26 21:19:35,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:35,277 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-09-26 21:19:35,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-26 21:19:35,278 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-09-26 21:19:35,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:35,278 INFO L225 Difference]: With dead ends: 98 [2018-09-26 21:19:35,278 INFO L226 Difference]: Without dead ends: 96 [2018-09-26 21:19:35,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-26 21:19:35,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-26 21:19:35,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-26 21:19:35,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-26 21:19:35,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-26 21:19:35,281 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-09-26 21:19:35,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:35,281 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-26 21:19:35,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-26 21:19:35,281 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-26 21:19:35,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-26 21:19:35,282 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:35,282 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-09-26 21:19:35,282 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:35,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:35,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1131577983, now seen corresponding path program 92 times [2018-09-26 21:19:35,282 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:35,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:35,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:35,283 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:19:35,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:39,248 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 21:19:39,249 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:39,249 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 21:19:39,256 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:19:39,304 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:19:39,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:39,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:39,326 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 21:19:39,350 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:39,350 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-26 21:19:39,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-26 21:19:39,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-26 21:19:39,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-26 21:19:39,352 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-09-26 21:19:39,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:39,550 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-26 21:19:39,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-26 21:19:39,551 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-09-26 21:19:39,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:39,552 INFO L225 Difference]: With dead ends: 99 [2018-09-26 21:19:39,552 INFO L226 Difference]: Without dead ends: 97 [2018-09-26 21:19:39,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-26 21:19:39,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-26 21:19:39,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-26 21:19:39,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-26 21:19:39,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-26 21:19:39,555 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-09-26 21:19:39,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:39,556 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-26 21:19:39,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-26 21:19:39,556 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-26 21:19:39,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-26 21:19:39,556 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:39,556 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-09-26 21:19:39,556 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:39,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:39,557 INFO L82 PathProgramCache]: Analyzing trace with hash -719181080, now seen corresponding path program 93 times [2018-09-26 21:19:39,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:39,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:39,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:39,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:39,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:39,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:43,132 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 21:19:43,132 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:43,132 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 21:19:43,140 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:19:43,222 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-26 21:19:43,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:43,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:43,250 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 21:19:43,275 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:43,275 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-26 21:19:43,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-26 21:19:43,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-26 21:19:43,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-26 21:19:43,277 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-09-26 21:19:43,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:43,485 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-09-26 21:19:43,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-26 21:19:43,486 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-09-26 21:19:43,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:43,487 INFO L225 Difference]: With dead ends: 100 [2018-09-26 21:19:43,487 INFO L226 Difference]: Without dead ends: 98 [2018-09-26 21:19:43,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-26 21:19:43,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-26 21:19:43,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-26 21:19:43,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-26 21:19:43,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-26 21:19:43,490 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-09-26 21:19:43,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:43,490 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-26 21:19:43,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-26 21:19:43,490 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-26 21:19:43,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-26 21:19:43,491 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:43,491 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-09-26 21:19:43,491 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:43,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:43,491 INFO L82 PathProgramCache]: Analyzing trace with hash -819778975, now seen corresponding path program 94 times [2018-09-26 21:19:43,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:43,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:43,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:43,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:43,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:43,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:46,952 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 21:19:46,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:46,953 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:19:46,960 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:19:47,013 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:19:47,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:47,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:47,040 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 21:19:47,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:47,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-26 21:19:47,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-26 21:19:47,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-26 21:19:47,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-26 21:19:47,073 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-09-26 21:19:47,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:47,337 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-26 21:19:47,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-26 21:19:47,337 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-09-26 21:19:47,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:47,338 INFO L225 Difference]: With dead ends: 101 [2018-09-26 21:19:47,338 INFO L226 Difference]: Without dead ends: 99 [2018-09-26 21:19:47,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-26 21:19:47,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-26 21:19:47,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-26 21:19:47,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-26 21:19:47,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-26 21:19:47,341 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-09-26 21:19:47,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:47,342 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-26 21:19:47,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-26 21:19:47,342 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-26 21:19:47,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-26 21:19:47,342 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:47,343 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-09-26 21:19:47,343 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:47,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:47,343 INFO L82 PathProgramCache]: Analyzing trace with hash 356653576, now seen corresponding path program 95 times [2018-09-26 21:19:47,343 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:47,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:47,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:47,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:47,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:50,683 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 21:19:50,684 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:50,684 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 21:19:50,691 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:19:50,780 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-26 21:19:50,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:50,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:50,800 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 21:19:50,820 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:50,820 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-26 21:19:50,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-26 21:19:50,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-26 21:19:50,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-26 21:19:50,822 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-09-26 21:19:51,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:51,367 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-09-26 21:19:51,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-26 21:19:51,368 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-09-26 21:19:51,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:51,368 INFO L225 Difference]: With dead ends: 102 [2018-09-26 21:19:51,369 INFO L226 Difference]: Without dead ends: 100 [2018-09-26 21:19:51,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-26 21:19:51,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-26 21:19:51,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-26 21:19:51,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-26 21:19:51,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-26 21:19:51,371 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-09-26 21:19:51,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:51,371 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-26 21:19:51,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-26 21:19:51,372 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-26 21:19:51,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-26 21:19:51,372 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:51,372 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-09-26 21:19:51,372 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:51,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:51,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1828643007, now seen corresponding path program 96 times [2018-09-26 21:19:51,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:51,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:51,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:51,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:51,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:54,788 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 21:19:54,788 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:54,788 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 21:19:54,796 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:19:54,886 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-26 21:19:54,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:54,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:54,905 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 21:19:54,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:54,925 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-26 21:19:54,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-26 21:19:54,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-26 21:19:54,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-26 21:19:54,926 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-09-26 21:19:55,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:55,197 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-26 21:19:55,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-26 21:19:55,198 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-09-26 21:19:55,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:55,199 INFO L225 Difference]: With dead ends: 103 [2018-09-26 21:19:55,199 INFO L226 Difference]: Without dead ends: 101 [2018-09-26 21:19:55,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-26 21:19:55,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-26 21:19:55,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-26 21:19:55,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-26 21:19:55,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-26 21:19:55,203 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-09-26 21:19:55,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:55,203 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-26 21:19:55,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-26 21:19:55,203 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-26 21:19:55,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-26 21:19:55,204 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:55,204 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-09-26 21:19:55,204 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:55,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:55,204 INFO L82 PathProgramCache]: Analyzing trace with hash -853360344, now seen corresponding path program 97 times [2018-09-26 21:19:55,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:55,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:55,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:55,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:55,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:58,876 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 21:19:58,876 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:58,876 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 21:19:58,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:19:58,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:58,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:58,963 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 21:19:58,984 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:58,984 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-26 21:19:58,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-26 21:19:58,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-26 21:19:58,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-26 21:19:58,985 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-09-26 21:19:59,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:59,250 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-26 21:19:59,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-26 21:19:59,250 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-09-26 21:19:59,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:59,251 INFO L225 Difference]: With dead ends: 104 [2018-09-26 21:19:59,251 INFO L226 Difference]: Without dead ends: 102 [2018-09-26 21:19:59,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-26 21:19:59,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-26 21:19:59,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-26 21:19:59,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-26 21:19:59,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-26 21:19:59,256 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-09-26 21:19:59,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:59,256 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-26 21:19:59,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-26 21:19:59,256 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-26 21:19:59,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-26 21:19:59,256 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:59,256 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-09-26 21:19:59,256 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:59,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:59,257 INFO L82 PathProgramCache]: Analyzing trace with hash -684368863, now seen corresponding path program 98 times [2018-09-26 21:19:59,257 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:59,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:59,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:59,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:19:59,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:59,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:03,023 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 21:20:03,024 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:03,024 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:20:03,031 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:20:03,086 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:03,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:03,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:03,106 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 21:20:03,126 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:03,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-26 21:20:03,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-26 21:20:03,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-26 21:20:03,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-26 21:20:03,128 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-09-26 21:20:03,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:03,339 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-26 21:20:03,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-26 21:20:03,340 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-09-26 21:20:03,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:03,340 INFO L225 Difference]: With dead ends: 105 [2018-09-26 21:20:03,341 INFO L226 Difference]: Without dead ends: 103 [2018-09-26 21:20:03,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-26 21:20:03,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-26 21:20:03,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-26 21:20:03,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-26 21:20:03,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-26 21:20:03,344 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-09-26 21:20:03,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:03,344 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-26 21:20:03,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-26 21:20:03,345 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-26 21:20:03,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-26 21:20:03,345 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:03,345 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-09-26 21:20:03,345 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:03,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:03,346 INFO L82 PathProgramCache]: Analyzing trace with hash 259399752, now seen corresponding path program 99 times [2018-09-26 21:20:03,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:03,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:03,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:03,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:03,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:07,131 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 21:20:07,131 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:07,132 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 21:20:07,138 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:20:07,227 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-26 21:20:07,227 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:07,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:07,248 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 21:20:07,268 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:07,269 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-26 21:20:07,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-26 21:20:07,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-26 21:20:07,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-26 21:20:07,270 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-09-26 21:20:07,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:07,535 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-09-26 21:20:07,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-26 21:20:07,536 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-09-26 21:20:07,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:07,537 INFO L225 Difference]: With dead ends: 106 [2018-09-26 21:20:07,537 INFO L226 Difference]: Without dead ends: 104 [2018-09-26 21:20:07,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-26 21:20:07,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-26 21:20:07,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-26 21:20:07,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-26 21:20:07,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-26 21:20:07,541 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-09-26 21:20:07,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:07,542 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-26 21:20:07,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-26 21:20:07,542 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-26 21:20:07,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-26 21:20:07,542 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:07,542 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-09-26 21:20:07,542 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:07,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:07,543 INFO L82 PathProgramCache]: Analyzing trace with hash -548544255, now seen corresponding path program 100 times [2018-09-26 21:20:07,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:07,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:07,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:07,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:07,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:07,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:11,129 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 21:20:11,129 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:11,129 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 21:20:11,137 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:20:11,191 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:20:11,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:11,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:11,213 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 21:20:11,233 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:11,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-26 21:20:11,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-26 21:20:11,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-26 21:20:11,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-26 21:20:11,235 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-09-26 21:20:11,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:11,430 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-26 21:20:11,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-26 21:20:11,431 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-09-26 21:20:11,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:11,432 INFO L225 Difference]: With dead ends: 107 [2018-09-26 21:20:11,432 INFO L226 Difference]: Without dead ends: 105 [2018-09-26 21:20:11,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-26 21:20:11,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-26 21:20:11,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-26 21:20:11,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-26 21:20:11,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-26 21:20:11,436 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-09-26 21:20:11,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:11,436 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-26 21:20:11,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-26 21:20:11,437 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-26 21:20:11,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-26 21:20:11,437 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:11,437 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-09-26 21:20:11,437 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:11,438 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:11,438 INFO L82 PathProgramCache]: Analyzing trace with hash 174995304, now seen corresponding path program 101 times [2018-09-26 21:20:11,438 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:11,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:11,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:11,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:11,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:11,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:15,421 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 21:20:15,422 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:15,422 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:20:15,430 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:20:15,537 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-26 21:20:15,538 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:15,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:15,566 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 21:20:15,587 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:15,587 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-26 21:20:15,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-26 21:20:15,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-26 21:20:15,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-26 21:20:15,589 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-09-26 21:20:15,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:15,821 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-09-26 21:20:15,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-26 21:20:15,821 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-09-26 21:20:15,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:15,823 INFO L225 Difference]: With dead ends: 108 [2018-09-26 21:20:15,823 INFO L226 Difference]: Without dead ends: 106 [2018-09-26 21:20:15,824 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-26 21:20:15,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-26 21:20:15,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-26 21:20:15,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-26 21:20:15,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-26 21:20:15,827 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-09-26 21:20:15,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:15,827 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-26 21:20:15,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-26 21:20:15,827 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-26 21:20:15,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-26 21:20:15,828 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:15,828 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-09-26 21:20:15,828 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:15,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:15,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1129885153, now seen corresponding path program 102 times [2018-09-26 21:20:15,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:15,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:15,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:15,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:15,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:19,876 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 21:20:19,876 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:19,876 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 21:20:19,886 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:20:19,977 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-09-26 21:20:19,977 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:19,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:19,999 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 21:20:20,018 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:20,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-26 21:20:20,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-26 21:20:20,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-26 21:20:20,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-26 21:20:20,021 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-09-26 21:20:20,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:20,334 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-26 21:20:20,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-26 21:20:20,334 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-09-26 21:20:20,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:20,335 INFO L225 Difference]: With dead ends: 109 [2018-09-26 21:20:20,335 INFO L226 Difference]: Without dead ends: 107 [2018-09-26 21:20:20,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-26 21:20:20,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-26 21:20:20,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-26 21:20:20,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-26 21:20:20,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-26 21:20:20,339 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-09-26 21:20:20,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:20,339 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-26 21:20:20,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-26 21:20:20,339 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-26 21:20:20,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-26 21:20:20,339 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:20,340 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-09-26 21:20:20,340 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:20,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:20,340 INFO L82 PathProgramCache]: Analyzing trace with hash 666699400, now seen corresponding path program 103 times [2018-09-26 21:20:20,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:20,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:20,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:20,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:20,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:24,507 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 21:20:24,507 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:24,507 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 21:20:24,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:24,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:24,595 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 21:20:24,615 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:24,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-26 21:20:24,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-26 21:20:24,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-26 21:20:24,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-26 21:20:24,617 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-09-26 21:20:24,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:24,926 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-09-26 21:20:24,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-26 21:20:24,928 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-09-26 21:20:24,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:24,928 INFO L225 Difference]: With dead ends: 110 [2018-09-26 21:20:24,928 INFO L226 Difference]: Without dead ends: 108 [2018-09-26 21:20:24,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-26 21:20:24,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-26 21:20:24,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-26 21:20:24,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-26 21:20:24,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-26 21:20:24,932 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-09-26 21:20:24,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:24,932 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-26 21:20:24,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-26 21:20:24,933 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-26 21:20:24,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-26 21:20:24,933 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:24,933 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-09-26 21:20:24,933 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:24,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:24,933 INFO L82 PathProgramCache]: Analyzing trace with hash -807157055, now seen corresponding path program 104 times [2018-09-26 21:20:24,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:24,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:24,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:24,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:24,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:24,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:29,293 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 21:20:29,293 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:29,293 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 21:20:29,301 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:20:29,355 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:29,355 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:29,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:29,386 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 21:20:29,415 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:29,415 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-26 21:20:29,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-26 21:20:29,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-26 21:20:29,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-26 21:20:29,417 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-09-26 21:20:29,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:29,720 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-26 21:20:29,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-26 21:20:29,721 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-09-26 21:20:29,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:29,722 INFO L225 Difference]: With dead ends: 111 [2018-09-26 21:20:29,722 INFO L226 Difference]: Without dead ends: 109 [2018-09-26 21:20:29,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-26 21:20:29,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-26 21:20:29,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-26 21:20:29,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-26 21:20:29,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-26 21:20:29,727 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-09-26 21:20:29,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:29,727 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-26 21:20:29,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-26 21:20:29,727 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-26 21:20:29,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-26 21:20:29,728 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:29,728 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-09-26 21:20:29,728 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:29,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:29,728 INFO L82 PathProgramCache]: Analyzing trace with hash 747933096, now seen corresponding path program 105 times [2018-09-26 21:20:29,728 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:29,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:29,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:29,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:29,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:29,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:34,077 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 21:20:34,077 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:34,077 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 21:20:34,084 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:20:34,182 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-26 21:20:34,182 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:34,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:34,204 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 21:20:34,224 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:34,225 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-26 21:20:34,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-26 21:20:34,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-26 21:20:34,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-26 21:20:34,226 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-09-26 21:20:34,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:34,551 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-09-26 21:20:34,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-26 21:20:34,551 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-09-26 21:20:34,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:34,552 INFO L225 Difference]: With dead ends: 112 [2018-09-26 21:20:34,552 INFO L226 Difference]: Without dead ends: 110 [2018-09-26 21:20:34,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-26 21:20:34,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-26 21:20:34,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-26 21:20:34,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-26 21:20:34,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-26 21:20:34,556 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-09-26 21:20:34,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:34,556 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-26 21:20:34,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-26 21:20:34,556 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-26 21:20:34,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-26 21:20:34,557 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:34,557 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-09-26 21:20:34,557 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:34,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:34,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1711087521, now seen corresponding path program 106 times [2018-09-26 21:20:34,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:34,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:34,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:34,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:34,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:34,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:38,930 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 21:20:38,930 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:38,930 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:20:38,937 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:20:39,000 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:20:39,001 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:39,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:39,023 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 21:20:39,043 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:39,044 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-26 21:20:39,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-26 21:20:39,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-26 21:20:39,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-26 21:20:39,045 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-09-26 21:20:39,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:39,407 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-26 21:20:39,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-26 21:20:39,408 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-09-26 21:20:39,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:39,408 INFO L225 Difference]: With dead ends: 113 [2018-09-26 21:20:39,408 INFO L226 Difference]: Without dead ends: 111 [2018-09-26 21:20:39,409 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-26 21:20:39,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-26 21:20:39,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-26 21:20:39,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-26 21:20:39,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-26 21:20:39,412 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-09-26 21:20:39,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:39,413 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-26 21:20:39,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-26 21:20:39,413 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-26 21:20:39,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-26 21:20:39,413 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:39,414 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-09-26 21:20:39,414 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:39,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:39,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1504103624, now seen corresponding path program 107 times [2018-09-26 21:20:39,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:39,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:39,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:39,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:39,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:43,808 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 21:20:43,808 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:43,808 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 21:20:43,817 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:20:43,927 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-26 21:20:43,927 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:43,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:43,951 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 21:20:43,972 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:43,972 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-26 21:20:43,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-26 21:20:43,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-26 21:20:43,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-26 21:20:43,973 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-09-26 21:20:44,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:44,283 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-09-26 21:20:44,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-26 21:20:44,283 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-09-26 21:20:44,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:44,284 INFO L225 Difference]: With dead ends: 114 [2018-09-26 21:20:44,284 INFO L226 Difference]: Without dead ends: 112 [2018-09-26 21:20:44,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-26 21:20:44,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-26 21:20:44,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-26 21:20:44,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-26 21:20:44,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-26 21:20:44,288 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-09-26 21:20:44,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:44,288 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-26 21:20:44,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-26 21:20:44,288 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-26 21:20:44,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-26 21:20:44,289 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:44,289 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-09-26 21:20:44,289 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:44,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:44,289 INFO L82 PathProgramCache]: Analyzing trace with hash -617429887, now seen corresponding path program 108 times [2018-09-26 21:20:44,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:44,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:44,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:44,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:44,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:44,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:48,744 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 21:20:48,745 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:48,745 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:20:48,752 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:20:48,849 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-26 21:20:48,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:48,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:48,876 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 21:20:48,896 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:48,896 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-26 21:20:48,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-26 21:20:48,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-26 21:20:48,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-26 21:20:48,898 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-09-26 21:20:49,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:49,212 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-26 21:20:49,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-26 21:20:49,212 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-09-26 21:20:49,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:49,213 INFO L225 Difference]: With dead ends: 115 [2018-09-26 21:20:49,213 INFO L226 Difference]: Without dead ends: 113 [2018-09-26 21:20:49,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-26 21:20:49,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-26 21:20:49,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-26 21:20:49,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-26 21:20:49,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-26 21:20:49,217 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-09-26 21:20:49,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:49,217 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-26 21:20:49,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-26 21:20:49,217 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-26 21:20:49,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-26 21:20:49,217 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:49,217 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-09-26 21:20:49,218 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:49,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:49,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1960459288, now seen corresponding path program 109 times [2018-09-26 21:20:49,218 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:49,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:49,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:49,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:49,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:53,790 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 21:20:53,791 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:53,791 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 21:20:53,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:53,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:53,880 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 21:20:53,900 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:53,900 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-26 21:20:53,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-26 21:20:53,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-26 21:20:53,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-26 21:20:53,902 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-09-26 21:20:54,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:54,181 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-09-26 21:20:54,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-26 21:20:54,182 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-09-26 21:20:54,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:54,182 INFO L225 Difference]: With dead ends: 116 [2018-09-26 21:20:54,183 INFO L226 Difference]: Without dead ends: 114 [2018-09-26 21:20:54,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-26 21:20:54,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-26 21:20:54,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-26 21:20:54,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-26 21:20:54,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-26 21:20:54,187 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-09-26 21:20:54,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:54,187 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-26 21:20:54,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-26 21:20:54,188 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-26 21:20:54,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-26 21:20:54,188 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:54,188 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-09-26 21:20:54,188 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:54,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:54,189 INFO L82 PathProgramCache]: Analyzing trace with hash -644697759, now seen corresponding path program 110 times [2018-09-26 21:20:54,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:54,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:54,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:54,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:54,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:54,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:58,906 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 21:20:58,907 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:58,907 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 21:20:58,925 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:20:58,983 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:58,984 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:58,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:59,007 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 21:20:59,027 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:59,027 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-09-26 21:20:59,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-26 21:20:59,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-26 21:20:59,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-26 21:20:59,029 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 113 states. [2018-09-26 21:20:59,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:59,337 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-26 21:20:59,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-26 21:20:59,337 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 113 [2018-09-26 21:20:59,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:59,338 INFO L225 Difference]: With dead ends: 117 [2018-09-26 21:20:59,338 INFO L226 Difference]: Without dead ends: 115 [2018-09-26 21:20:59,339 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-26 21:20:59,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-26 21:20:59,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-26 21:20:59,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-26 21:20:59,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-26 21:20:59,342 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-09-26 21:20:59,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:59,343 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-26 21:20:59,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-26 21:20:59,343 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-26 21:20:59,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-26 21:20:59,343 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:59,343 INFO L375 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-09-26 21:20:59,344 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:59,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:59,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1489203976, now seen corresponding path program 111 times [2018-09-26 21:20:59,344 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:59,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:59,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:59,345 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:59,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:59,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-26 21:20:59,746 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 21:20:59,751 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 21:20:59,751 INFO L202 PluginConnector]: Adding new model overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:20:59 BoogieIcfgContainer [2018-09-26 21:20:59,751 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:20:59,752 INFO L168 Benchmark]: Toolchain (without parser) took 234570.08 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -148.9 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 358.8 MB). Peak memory consumption was 209.9 MB. Max. memory is 7.1 GB. [2018-09-26 21:20:59,753 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:20:59,753 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.03 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:20:59,753 INFO L168 Benchmark]: Boogie Preprocessor took 22.72 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:20:59,754 INFO L168 Benchmark]: RCFGBuilder took 257.00 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-26 21:20:59,754 INFO L168 Benchmark]: TraceAbstraction took 234241.35 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -148.9 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 337.7 MB). Peak memory consumption was 188.8 MB. Max. memory is 7.1 GB. [2018-09-26 21:20:59,756 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 0.15 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.03 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.72 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 257.00 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 234241.35 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -148.9 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 337.7 MB). Peak memory consumption was 188.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 31]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 31). Cancelled while BasicCegarLoop was analyzing trace of length 115 with TraceHistMax 111, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while NestedInterpolantsBuilder was constructing predicates for 113 interpolants. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 234.1s OverallTime, 112 OverallIterations, 111 TraceHistogramMax, 21.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 333 SDtfs, 0 SDslu, 4870 SDs, 0 SdLazy, 11197 SolverSat, 164 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12652 GetRequests, 6436 SyntacticMatches, 0 SemanticMatches, 6216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 196.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=111, 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, 111 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 5.4s SatisfiabilityAnalysisTime, 200.8s InterpolantComputationTime, 12873 NumberOfCodeBlocks, 12873 NumberOfCodeBlocksAsserted, 1779 NumberOfCheckSat, 12652 ConstructedInterpolants, 0 QuantifiedInterpolants, 2822278 SizeOfPredicates, 110 NumberOfNonLiveVariables, 26400 ConjunctsInSsa, 6325 ConjunctsInUnsatCore, 221 InterpolantComputations, 1 PerfectInterpolantSequences, 0/455840 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/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_21-20-59-764.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_21-20-59-764.csv Completed graceful shutdown