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/20170304-DifficultPathPrograms/array1.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2eb0a67 [2018-10-03 08:40:16,079 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-03 08:40:16,081 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-03 08:40:16,092 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-03 08:40:16,092 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-03 08:40:16,093 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-03 08:40:16,094 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-03 08:40:16,096 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-03 08:40:16,100 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-03 08:40:16,101 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-03 08:40:16,102 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-03 08:40:16,102 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-03 08:40:16,103 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-03 08:40:16,104 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-03 08:40:16,107 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-03 08:40:16,108 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-03 08:40:16,112 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-03 08:40:16,116 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-03 08:40:16,118 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-03 08:40:16,121 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-03 08:40:16,123 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-03 08:40:16,125 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-03 08:40:16,130 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-03 08:40:16,144 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 [2018-10-03 08:40:16,167 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-03 08:40:16,167 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-03 08:40:16,168 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-03 08:40:16,168 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-03 08:40:16,169 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-03 08:40:16,169 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-03 08:40:16,169 INFO L133 SettingsManager]: * Use SBE=true [2018-10-03 08:40:16,170 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-03 08:40:16,170 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-03 08:40:16,170 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-03 08:40:16,170 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-03 08:40:16,170 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-03 08:40:16,171 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-03 08:40:16,171 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-03 08:40:16,171 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-03 08:40:16,171 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-03 08:40:16,171 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-03 08:40:16,172 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-03 08:40:16,172 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-03 08:40:16,172 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-03 08:40:16,172 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-03 08:40:16,173 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-03 08:40:16,173 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 08:40:16,173 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-03 08:40:16,173 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-03 08:40:16,173 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-03 08:40:16,174 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-03 08:40:16,174 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-03 08:40:16,174 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-03 08:40:16,174 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-03 08:40:16,220 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-03 08:40:16,234 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-03 08:40:16,240 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-03 08:40:16,242 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-03 08:40:16,243 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-03 08:40:16,244 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array1.i_3.bpl [2018-10-03 08:40:16,244 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array1.i_3.bpl' [2018-10-03 08:40:16,299 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-03 08:40:16,302 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-03 08:40:16,303 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-03 08:40:16,303 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-03 08:40:16,303 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-03 08:40:16,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:40:16" (1/1) ... [2018-10-03 08:40:16,337 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:40:16" (1/1) ... [2018-10-03 08:40:16,345 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-03 08:40:16,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-03 08:40:16,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-03 08:40:16,346 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-03 08:40:16,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:40:16" (1/1) ... [2018-10-03 08:40:16,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:40:16" (1/1) ... [2018-10-03 08:40:16,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:40:16" (1/1) ... [2018-10-03 08:40:16,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:40:16" (1/1) ... [2018-10-03 08:40:16,361 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:40:16" (1/1) ... [2018-10-03 08:40:16,363 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:40:16" (1/1) ... [2018-10-03 08:40:16,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:40:16" (1/1) ... [2018-10-03 08:40:16,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-03 08:40:16,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-03 08:40:16,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-03 08:40:16,367 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-03 08:40:16,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:40:16" (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 [2018-10-03 08:40:16,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-03 08:40:16,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-03 08:40:16,680 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-03 08:40:16,681 INFO L202 PluginConnector]: Adding new model array1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:40:16 BoogieIcfgContainer [2018-10-03 08:40:16,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-03 08:40:16,682 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-03 08:40:16,682 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-03 08:40:16,692 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-03 08:40:16,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:40:16" (1/2) ... [2018-10-03 08:40:16,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a28eff and model type array1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 08:40:16, skipping insertion in model container [2018-10-03 08:40:16,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:40:16" (2/2) ... [2018-10-03 08:40:16,695 INFO L112 eAbstractionObserver]: Analyzing ICFG array1.i_3.bpl [2018-10-03 08:40:16,706 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-03 08:40:16,715 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-03 08:40:16,762 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-03 08:40:16,762 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-03 08:40:16,762 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-03 08:40:16,763 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-03 08:40:16,763 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-03 08:40:16,763 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-03 08:40:16,763 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-03 08:40:16,763 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-03 08:40:16,764 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-03 08:40:16,776 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-03 08:40:16,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-03 08:40:16,782 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:16,783 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-03 08:40:16,784 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:16,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:16,790 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-03 08:40:16,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:16,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:16,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:16,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:16,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:16,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:16,959 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:40:16,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-03 08:40:16,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-03 08:40:16,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-03 08:40:16,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-03 08:40:16,983 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-03 08:40:17,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:17,045 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-03 08:40:17,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-03 08:40:17,047 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-03 08:40:17,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:17,058 INFO L225 Difference]: With dead ends: 11 [2018-10-03 08:40:17,059 INFO L226 Difference]: Without dead ends: 7 [2018-10-03 08:40:17,063 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 [2018-10-03 08:40:17,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-03 08:40:17,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-03 08:40:17,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-03 08:40:17,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-03 08:40:17,100 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-10-03 08:40:17,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:17,101 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-03 08:40:17,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-03 08:40:17,101 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-03 08:40:17,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-03 08:40:17,102 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:17,102 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-03 08:40:17,102 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:17,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:17,103 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-10-03 08:40:17,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:17,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:17,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:17,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:17,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:17,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:17,226 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:17,226 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 [2018-10-03 08:40:17,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:17,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:17,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:17,289 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:17,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-03 08:40:17,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-03 08:40:17,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-03 08:40:17,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:40:17,292 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-10-03 08:40:17,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:17,331 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-03 08:40:17,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-03 08:40:17,333 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-03 08:40:17,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:17,333 INFO L225 Difference]: With dead ends: 11 [2018-10-03 08:40:17,333 INFO L226 Difference]: Without dead ends: 9 [2018-10-03 08:40:17,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:40:17,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-03 08:40:17,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-03 08:40:17,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-03 08:40:17,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-03 08:40:17,343 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-03 08:40:17,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:17,343 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-03 08:40:17,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-03 08:40:17,344 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-03 08:40:17,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-03 08:40:17,344 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:17,344 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-10-03 08:40:17,349 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:17,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:17,349 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-10-03 08:40:17,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:17,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:17,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:17,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:17,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:17,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:17,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:17,531 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:40:17,543 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:40:17,566 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:40:17,566 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:17,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:17,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:17,593 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:17,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-03 08:40:17,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 08:40:17,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 08:40:17,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:40:17,595 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-10-03 08:40:17,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:17,659 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-03 08:40:17,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 08:40:17,659 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-03 08:40:17,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:17,660 INFO L225 Difference]: With dead ends: 13 [2018-10-03 08:40:17,660 INFO L226 Difference]: Without dead ends: 11 [2018-10-03 08:40:17,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:40:17,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-03 08:40:17,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-03 08:40:17,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-03 08:40:17,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-03 08:40:17,664 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-10-03 08:40:17,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:17,665 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-03 08:40:17,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 08:40:17,665 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-03 08:40:17,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-03 08:40:17,666 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:17,666 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-10-03 08:40:17,666 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:17,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:17,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-10-03 08:40:17,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:17,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:17,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:17,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:17,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:17,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:17,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:17,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:17,777 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 [2018-10-03 08:40:17,786 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:40:17,805 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-03 08:40:17,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:17,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:17,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:17,836 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:17,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-03 08:40:17,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 08:40:17,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 08:40:17,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:40:17,838 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-10-03 08:40:17,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:17,898 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-03 08:40:17,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:40:17,899 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-03 08:40:17,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:17,900 INFO L225 Difference]: With dead ends: 15 [2018-10-03 08:40:17,900 INFO L226 Difference]: Without dead ends: 13 [2018-10-03 08:40:17,900 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:40:17,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-03 08:40:17,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-03 08:40:17,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-03 08:40:17,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-03 08:40:17,907 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-03 08:40:17,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:17,908 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-03 08:40:17,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 08:40:17,908 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-03 08:40:17,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-03 08:40:17,909 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:17,909 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-10-03 08:40:17,909 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:17,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:17,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-10-03 08:40:17,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:17,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:17,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:17,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:17,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:18,255 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:18,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:18,256 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 [2018-10-03 08:40:18,271 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:40:18,301 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:40:18,302 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:18,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:18,337 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:18,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 08:40:18,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:40:18,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:40:18,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:40:18,339 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-10-03 08:40:18,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:18,385 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-03 08:40:18,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:40:18,386 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-03 08:40:18,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:18,387 INFO L225 Difference]: With dead ends: 17 [2018-10-03 08:40:18,388 INFO L226 Difference]: Without dead ends: 15 [2018-10-03 08:40:18,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:40:18,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-03 08:40:18,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-03 08:40:18,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-03 08:40:18,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-03 08:40:18,395 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-03 08:40:18,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:18,396 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-03 08:40:18,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:40:18,396 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-03 08:40:18,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-03 08:40:18,399 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:18,399 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-10-03 08:40:18,399 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:18,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:18,400 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-10-03 08:40:18,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:18,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:18,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:18,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:18,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:18,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:18,547 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:18,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:18,547 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:40:18,556 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:40:18,572 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-03 08:40:18,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:18,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:18,583 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:18,606 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:18,607 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:40:18,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:40:18,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:40:18,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:40:18,608 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-10-03 08:40:18,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:18,734 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-03 08:40:18,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:40:18,735 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-03 08:40:18,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:18,736 INFO L225 Difference]: With dead ends: 19 [2018-10-03 08:40:18,736 INFO L226 Difference]: Without dead ends: 17 [2018-10-03 08:40:18,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:40:18,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-03 08:40:18,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-03 08:40:18,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-03 08:40:18,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-03 08:40:18,742 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-10-03 08:40:18,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:18,742 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-03 08:40:18,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:40:18,742 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-03 08:40:18,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-03 08:40:18,743 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:18,743 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-10-03 08:40:18,744 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:18,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:18,744 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-10-03 08:40:18,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:18,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:18,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:18,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:18,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:18,882 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:18,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:18,882 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 [2018-10-03 08:40:18,897 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:40:18,935 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 08:40:18,936 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:18,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:18,946 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:18,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:18,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:40:18,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:40:18,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:40:18,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:40:18,968 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-10-03 08:40:19,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:19,000 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-03 08:40:19,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:40:19,002 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-03 08:40:19,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:19,003 INFO L225 Difference]: With dead ends: 21 [2018-10-03 08:40:19,003 INFO L226 Difference]: Without dead ends: 19 [2018-10-03 08:40:19,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:40:19,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-03 08:40:19,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-03 08:40:19,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-03 08:40:19,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-03 08:40:19,007 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-10-03 08:40:19,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:19,007 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-03 08:40:19,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:40:19,008 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-03 08:40:19,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-03 08:40:19,008 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:19,009 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-10-03 08:40:19,009 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:19,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:19,009 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-10-03 08:40:19,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:19,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:19,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:19,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:19,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:19,213 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:19,214 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:40:19,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:19,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:19,250 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:19,276 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:19,276 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:40:19,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:40:19,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:40:19,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:40:19,277 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-10-03 08:40:19,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:19,321 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-03 08:40:19,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:40:19,321 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-03 08:40:19,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:19,322 INFO L225 Difference]: With dead ends: 23 [2018-10-03 08:40:19,323 INFO L226 Difference]: Without dead ends: 21 [2018-10-03 08:40:19,323 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:40:19,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-03 08:40:19,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-03 08:40:19,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-03 08:40:19,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-03 08:40:19,327 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-10-03 08:40:19,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:19,328 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-03 08:40:19,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:40:19,328 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-03 08:40:19,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-03 08:40:19,329 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:19,329 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-10-03 08:40:19,329 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:19,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:19,330 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-10-03 08:40:19,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:19,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:19,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:19,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:19,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:19,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:19,750 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:19,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:19,751 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:40:19,763 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:40:19,778 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:40:19,778 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:19,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:19,788 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:19,811 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:19,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:40:19,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:40:19,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:40:19,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:40:19,813 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-10-03 08:40:19,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:19,870 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-03 08:40:19,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:40:19,870 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-03 08:40:19,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:19,871 INFO L225 Difference]: With dead ends: 25 [2018-10-03 08:40:19,871 INFO L226 Difference]: Without dead ends: 23 [2018-10-03 08:40:19,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:40:19,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-03 08:40:19,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-03 08:40:19,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-03 08:40:19,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-03 08:40:19,877 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-10-03 08:40:19,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:19,877 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-03 08:40:19,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:40:19,877 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-03 08:40:19,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-03 08:40:19,878 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:19,878 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-10-03 08:40:19,878 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:19,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:19,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-10-03 08:40:19,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:19,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:19,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:19,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:19,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:20,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:20,031 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:40:20,041 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:40:20,062 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-03 08:40:20,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:20,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:20,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:20,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-03 08:40:20,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-03 08:40:20,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-03 08:40:20,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:40:20,101 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-10-03 08:40:20,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:20,167 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-03 08:40:20,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-03 08:40:20,168 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-03 08:40:20,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:20,168 INFO L225 Difference]: With dead ends: 27 [2018-10-03 08:40:20,169 INFO L226 Difference]: Without dead ends: 25 [2018-10-03 08:40:20,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:40:20,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-03 08:40:20,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-03 08:40:20,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-03 08:40:20,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-03 08:40:20,173 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-10-03 08:40:20,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:20,174 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-03 08:40:20,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-03 08:40:20,174 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-03 08:40:20,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-03 08:40:20,175 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:20,175 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-10-03 08:40:20,175 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:20,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:20,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-10-03 08:40:20,175 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:20,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:20,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:20,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:20,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:20,626 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:20,626 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:20,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:40:20,634 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:40:20,655 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:40:20,656 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:20,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:20,688 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:20,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-03 08:40:20,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-03 08:40:20,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-03 08:40:20,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:40:20,690 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-10-03 08:40:20,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:20,764 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-03 08:40:20,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-03 08:40:20,764 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-03 08:40:20,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:20,765 INFO L225 Difference]: With dead ends: 29 [2018-10-03 08:40:20,765 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 08:40:20,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:40:20,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 08:40:20,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-03 08:40:20,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-03 08:40:20,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-03 08:40:20,770 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-10-03 08:40:20,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:20,771 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-03 08:40:20,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-03 08:40:20,771 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-03 08:40:20,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-03 08:40:20,772 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:20,772 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-10-03 08:40:20,772 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:20,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:20,772 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-10-03 08:40:20,773 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:20,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:20,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:20,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:20,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:20,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:21,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:21,024 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:40:21,031 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:40:21,063 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-03 08:40:21,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:21,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:21,080 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:21,112 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:21,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-03 08:40:21,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 08:40:21,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 08:40:21,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:40:21,114 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-10-03 08:40:21,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:21,331 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-03 08:40:21,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-03 08:40:21,334 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-03 08:40:21,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:21,335 INFO L225 Difference]: With dead ends: 31 [2018-10-03 08:40:21,335 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 08:40:21,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:40:21,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 08:40:21,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-03 08:40:21,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-03 08:40:21,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-03 08:40:21,344 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-10-03 08:40:21,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:21,344 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-03 08:40:21,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 08:40:21,344 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-03 08:40:21,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-03 08:40:21,345 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:21,345 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-10-03 08:40:21,346 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:21,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:21,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-10-03 08:40:21,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:21,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:21,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:21,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:21,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:21,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:21,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:21,597 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 [2018-10-03 08:40:21,604 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:40:21,628 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-03 08:40:21,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:21,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:21,641 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:21,665 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:21,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-03 08:40:21,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-03 08:40:21,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-03 08:40:21,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:40:21,666 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-10-03 08:40:21,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:21,711 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-03 08:40:21,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-03 08:40:21,711 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-03 08:40:21,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:21,712 INFO L225 Difference]: With dead ends: 33 [2018-10-03 08:40:21,712 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 08:40:21,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:40:21,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 08:40:21,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-03 08:40:21,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-03 08:40:21,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-03 08:40:21,718 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-10-03 08:40:21,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:21,718 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-03 08:40:21,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-03 08:40:21,718 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-03 08:40:21,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-03 08:40:21,719 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:21,719 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-10-03 08:40:21,720 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:21,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:21,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-10-03 08:40:21,720 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:21,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:21,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:21,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:21,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:21,990 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:21,991 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:21,991 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 [2018-10-03 08:40:21,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:22,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:22,035 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:22,056 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:22,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-03 08:40:22,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-03 08:40:22,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-03 08:40:22,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:40:22,057 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-10-03 08:40:22,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:22,098 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-03 08:40:22,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-03 08:40:22,100 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-03 08:40:22,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:22,101 INFO L225 Difference]: With dead ends: 35 [2018-10-03 08:40:22,101 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 08:40:22,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:40:22,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 08:40:22,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-03 08:40:22,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-03 08:40:22,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-03 08:40:22,106 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-10-03 08:40:22,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:22,107 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-03 08:40:22,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-03 08:40:22,107 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-03 08:40:22,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-03 08:40:22,108 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:22,108 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-10-03 08:40:22,108 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:22,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:22,109 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-10-03 08:40:22,109 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:22,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:22,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:22,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:22,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:22,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:22,314 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:40:22,343 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:40:22,389 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:40:22,390 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:22,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:22,414 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:22,444 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:22,444 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-03 08:40:22,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 08:40:22,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 08:40:22,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:40:22,445 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-10-03 08:40:22,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:22,812 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-03 08:40:22,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-03 08:40:22,812 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-03 08:40:22,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:22,813 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:40:22,813 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:40:22,813 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:40:22,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:40:22,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-03 08:40:22,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-03 08:40:22,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-03 08:40:22,817 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-10-03 08:40:22,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:22,818 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-03 08:40:22,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 08:40:22,818 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-03 08:40:22,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-03 08:40:22,819 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:22,819 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-10-03 08:40:22,819 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:22,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:22,819 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-10-03 08:40:22,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:22,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:22,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:22,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:22,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:22,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:23,127 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:23,127 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:23,127 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 [2018-10-03 08:40:23,136 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:40:23,167 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-03 08:40:23,167 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:23,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:23,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:23,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-03 08:40:23,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-03 08:40:23,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-03 08:40:23,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:40:23,207 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-10-03 08:40:23,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:23,307 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-03 08:40:23,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-03 08:40:23,308 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-03 08:40:23,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:23,309 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:40:23,309 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:40:23,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:40:23,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:40:23,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-03 08:40:23,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-03 08:40:23,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-03 08:40:23,316 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-10-03 08:40:23,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:23,316 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-03 08:40:23,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-03 08:40:23,317 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-03 08:40:23,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-03 08:40:23,317 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:23,317 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-10-03 08:40:23,318 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:23,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:23,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-10-03 08:40:23,318 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:23,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:23,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:23,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:23,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:23,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:23,722 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:23,722 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 [2018-10-03 08:40:23,730 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:40:23,745 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:40:23,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:23,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:23,761 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:23,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:23,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-03 08:40:23,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-03 08:40:23,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-03 08:40:23,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:40:23,789 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-10-03 08:40:23,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:23,832 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-03 08:40:23,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-03 08:40:23,838 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-03 08:40:23,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:23,838 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:40:23,838 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:40:23,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:40:23,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:40:23,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-03 08:40:23,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-03 08:40:23,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-03 08:40:23,847 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-10-03 08:40:23,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:23,847 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-03 08:40:23,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-03 08:40:23,849 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-03 08:40:23,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-03 08:40:23,850 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:23,850 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-10-03 08:40:23,850 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:23,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:23,854 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-10-03 08:40:23,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:23,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:23,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:23,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:23,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:23,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:24,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:24,312 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 [2018-10-03 08:40:24,319 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:40:24,365 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-03 08:40:24,365 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:24,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:24,380 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:24,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:24,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-03 08:40:24,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 08:40:24,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 08:40:24,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:40:24,411 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-10-03 08:40:24,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:24,526 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-03 08:40:24,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-03 08:40:24,527 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-03 08:40:24,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:24,527 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:40:24,527 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:40:24,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:40:24,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:40:24,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-03 08:40:24,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-03 08:40:24,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-03 08:40:24,534 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-10-03 08:40:24,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:24,535 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-03 08:40:24,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 08:40:24,535 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-03 08:40:24,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-03 08:40:24,536 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:24,536 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-10-03 08:40:24,536 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:24,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:24,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-10-03 08:40:24,541 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:24,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:24,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:24,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:24,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:24,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:24,834 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:24,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:24,834 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 [2018-10-03 08:40:24,841 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:40:24,877 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-03 08:40:24,878 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:24,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:24,930 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:24,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-03 08:40:24,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-03 08:40:24,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-03 08:40:24,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:40:24,932 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-10-03 08:40:24,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:24,997 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-03 08:40:24,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-03 08:40:24,998 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-10-03 08:40:24,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:24,999 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:40:24,999 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:40:24,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:40:25,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:40:25,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-03 08:40:25,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-03 08:40:25,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-03 08:40:25,005 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-10-03 08:40:25,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:25,005 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-03 08:40:25,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-03 08:40:25,005 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-03 08:40:25,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-03 08:40:25,006 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:25,006 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-10-03 08:40:25,006 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:25,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:25,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-10-03 08:40:25,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:25,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:25,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:25,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:25,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:25,265 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:25,265 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:25,265 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 [2018-10-03 08:40:25,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:25,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:25,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:25,305 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:25,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:25,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-03 08:40:25,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-03 08:40:25,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-03 08:40:25,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:40:25,336 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-10-03 08:40:25,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:25,483 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-03 08:40:25,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-03 08:40:25,483 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-03 08:40:25,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:25,484 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:40:25,484 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:40:25,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:40:25,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:40:25,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-03 08:40:25,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-03 08:40:25,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-03 08:40:25,489 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-10-03 08:40:25,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:25,489 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-03 08:40:25,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-03 08:40:25,489 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-03 08:40:25,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-03 08:40:25,490 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:25,490 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-10-03 08:40:25,490 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:25,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:25,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-10-03 08:40:25,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:25,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:25,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:25,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:25,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:25,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:26,365 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:26,365 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:26,365 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:40:26,379 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:40:26,396 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:40:26,396 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:26,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:26,429 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:26,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-03 08:40:26,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-03 08:40:26,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-03 08:40:26,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:40:26,431 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-10-03 08:40:26,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:26,495 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-03 08:40:26,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-03 08:40:26,496 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-03 08:40:26,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:26,496 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:40:26,497 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:40:26,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:40:26,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:40:26,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-03 08:40:26,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-03 08:40:26,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-03 08:40:26,503 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-10-03 08:40:26,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:26,503 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-03 08:40:26,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-03 08:40:26,503 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-03 08:40:26,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-03 08:40:26,504 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:26,504 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-10-03 08:40:26,505 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:26,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:26,505 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-10-03 08:40:26,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:26,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:26,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:26,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:26,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:26,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:26,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:26,854 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 [2018-10-03 08:40:26,861 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:40:26,952 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-03 08:40:26,952 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:26,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:26,968 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:26,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:26,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-03 08:40:26,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-03 08:40:26,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-03 08:40:26,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:40:26,999 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-10-03 08:40:27,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:27,219 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-03 08:40:27,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-03 08:40:27,222 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-03 08:40:27,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:27,223 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:40:27,223 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:40:27,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:40:27,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:40:27,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-03 08:40:27,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-03 08:40:27,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-03 08:40:27,228 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-10-03 08:40:27,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:27,229 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-03 08:40:27,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-03 08:40:27,229 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-03 08:40:27,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-03 08:40:27,229 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:27,230 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-10-03 08:40:27,230 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:27,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:27,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-10-03 08:40:27,230 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:27,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:27,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:27,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:27,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:27,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:27,613 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:27,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:27,614 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:40:27,622 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:40:27,643 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:40:27,643 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:27,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:27,660 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:27,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:27,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-03 08:40:27,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-03 08:40:27,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-03 08:40:27,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:40:27,686 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-10-03 08:40:27,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:27,751 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-03 08:40:27,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-03 08:40:27,751 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-10-03 08:40:27,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:27,752 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:40:27,752 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:40:27,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:40:27,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:40:27,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-03 08:40:27,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-03 08:40:27,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-03 08:40:27,759 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-10-03 08:40:27,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:27,759 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-03 08:40:27,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-03 08:40:27,759 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-03 08:40:27,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-03 08:40:27,760 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:27,760 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-10-03 08:40:27,761 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:27,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:27,761 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-10-03 08:40:27,761 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:27,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:27,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:27,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:27,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:29,321 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:29,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:29,321 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 [2018-10-03 08:40:29,332 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:40:29,415 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-03 08:40:29,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:29,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:29,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:29,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-03 08:40:29,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 08:40:29,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 08:40:29,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:40:29,464 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-10-03 08:40:29,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:29,594 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-03 08:40:29,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-03 08:40:29,595 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-03 08:40:29,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:29,595 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:40:29,596 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:40:29,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:40:29,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:40:29,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-03 08:40:29,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-03 08:40:29,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-03 08:40:29,600 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-10-03 08:40:29,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:29,600 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-03 08:40:29,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 08:40:29,600 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-03 08:40:29,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-03 08:40:29,601 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:29,601 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-10-03 08:40:29,601 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:29,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:29,601 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-10-03 08:40:29,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:29,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:29,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:29,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:29,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:29,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:30,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:30,298 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 [2018-10-03 08:40:30,305 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:40:30,396 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-03 08:40:30,396 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:30,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:30,409 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:30,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:30,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-03 08:40:30,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-03 08:40:30,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-03 08:40:30,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:40:30,439 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-10-03 08:40:30,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:30,509 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-03 08:40:30,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-03 08:40:30,510 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-10-03 08:40:30,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:30,510 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:40:30,511 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:40:30,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:40:30,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:40:30,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-03 08:40:30,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-03 08:40:30,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-03 08:40:30,516 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-10-03 08:40:30,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:30,516 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-03 08:40:30,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-03 08:40:30,516 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-03 08:40:30,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-03 08:40:30,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:30,517 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-10-03 08:40:30,517 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:30,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:30,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-10-03 08:40:30,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:30,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:30,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:30,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:30,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:30,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:31,383 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:31,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:31,383 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 [2018-10-03 08:40:31,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:31,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:31,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:31,422 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:31,449 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:31,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-03 08:40:31,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-03 08:40:31,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-03 08:40:31,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:40:31,451 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-10-03 08:40:31,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:31,490 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-03 08:40:31,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-03 08:40:31,491 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-03 08:40:31,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:31,492 INFO L225 Difference]: With dead ends: 59 [2018-10-03 08:40:31,492 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 08:40:31,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:40:31,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 08:40:31,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-03 08:40:31,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-03 08:40:31,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-03 08:40:31,496 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-10-03 08:40:31,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:31,496 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-03 08:40:31,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-03 08:40:31,497 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-03 08:40:31,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-03 08:40:31,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:31,500 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-10-03 08:40:31,500 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:31,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:31,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-10-03 08:40:31,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:31,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:31,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:31,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:31,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:31,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:32,350 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:32,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:32,351 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 [2018-10-03 08:40:32,361 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:40:32,382 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:40:32,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:32,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:32,396 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:32,424 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:32,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-03 08:40:32,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 08:40:32,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 08:40:32,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:40:32,425 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-10-03 08:40:32,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:32,481 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-03 08:40:32,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-03 08:40:32,482 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-10-03 08:40:32,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:32,483 INFO L225 Difference]: With dead ends: 61 [2018-10-03 08:40:32,483 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:40:32,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:40:32,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:40:32,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-03 08:40:32,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-03 08:40:32,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-03 08:40:32,488 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-10-03 08:40:32,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:32,488 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-03 08:40:32,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 08:40:32,488 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-03 08:40:32,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-03 08:40:32,489 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:32,489 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-10-03 08:40:32,489 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:32,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:32,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-10-03 08:40:32,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:32,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:32,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:32,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:32,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:32,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:32,946 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:32,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:32,947 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 [2018-10-03 08:40:32,960 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:40:33,041 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-03 08:40:33,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:33,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:33,056 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:33,083 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:33,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-03 08:40:33,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-03 08:40:33,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-03 08:40:33,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:40:33,084 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-10-03 08:40:33,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:33,131 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-03 08:40:33,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-03 08:40:33,132 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-03 08:40:33,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:33,133 INFO L225 Difference]: With dead ends: 63 [2018-10-03 08:40:33,133 INFO L226 Difference]: Without dead ends: 61 [2018-10-03 08:40:33,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:40:33,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-03 08:40:33,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-03 08:40:33,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-03 08:40:33,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-03 08:40:33,137 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-10-03 08:40:33,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:33,138 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-03 08:40:33,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-03 08:40:33,138 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-03 08:40:33,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-03 08:40:33,139 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:33,139 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-10-03 08:40:33,139 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:33,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:33,142 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-10-03 08:40:33,143 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:33,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:33,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:33,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:33,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:33,762 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:33,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:33,762 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 [2018-10-03 08:40:33,770 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:40:33,792 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:40:33,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:33,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:33,805 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:33,827 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:33,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-03 08:40:33,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-03 08:40:33,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-03 08:40:33,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:40:33,829 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-10-03 08:40:33,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:33,896 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-03 08:40:33,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-03 08:40:33,897 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-10-03 08:40:33,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:33,898 INFO L225 Difference]: With dead ends: 65 [2018-10-03 08:40:33,898 INFO L226 Difference]: Without dead ends: 63 [2018-10-03 08:40:33,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:40:33,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-03 08:40:33,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-03 08:40:33,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-03 08:40:33,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-03 08:40:33,902 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-10-03 08:40:33,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:33,902 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-03 08:40:33,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-03 08:40:33,902 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-03 08:40:33,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-03 08:40:33,903 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:33,903 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-10-03 08:40:33,903 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:33,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:33,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-10-03 08:40:33,904 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:33,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:33,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:33,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:33,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:33,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:34,503 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:34,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:34,503 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:40:34,510 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:40:34,675 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-03 08:40:34,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:34,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:34,712 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:34,712 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-03 08:40:34,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-03 08:40:34,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-03 08:40:34,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:40:34,713 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-10-03 08:40:34,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:34,780 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-03 08:40:34,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-03 08:40:34,781 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-03 08:40:34,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:34,782 INFO L225 Difference]: With dead ends: 67 [2018-10-03 08:40:34,782 INFO L226 Difference]: Without dead ends: 65 [2018-10-03 08:40:34,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:40:34,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-03 08:40:34,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-03 08:40:34,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-03 08:40:34,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-03 08:40:34,799 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-10-03 08:40:34,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:34,800 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-03 08:40:34,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-03 08:40:34,800 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-03 08:40:34,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-03 08:40:34,800 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:34,802 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-10-03 08:40:34,803 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:34,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:34,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-10-03 08:40:34,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:34,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:34,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:34,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:34,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:35,587 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:35,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:35,588 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 [2018-10-03 08:40:35,596 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:40:35,695 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-03 08:40:35,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:35,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:35,709 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:35,729 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:35,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-03 08:40:35,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-03 08:40:35,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-03 08:40:35,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:40:35,730 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-10-03 08:40:35,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:35,949 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-03 08:40:35,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-03 08:40:35,949 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-10-03 08:40:35,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:35,950 INFO L225 Difference]: With dead ends: 69 [2018-10-03 08:40:35,950 INFO L226 Difference]: Without dead ends: 67 [2018-10-03 08:40:35,951 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:40:35,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-03 08:40:35,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-03 08:40:35,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-03 08:40:35,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-03 08:40:35,953 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-10-03 08:40:35,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:35,953 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-03 08:40:35,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-03 08:40:35,954 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-03 08:40:35,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-03 08:40:35,954 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:35,954 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-10-03 08:40:35,954 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:35,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:35,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-10-03 08:40:35,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:35,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:35,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:35,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:35,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:35,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:36,482 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:36,482 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:40:36,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:36,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:36,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:36,526 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:36,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:36,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-03 08:40:36,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-03 08:40:36,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-03 08:40:36,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:40:36,548 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-10-03 08:40:36,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:36,606 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-03 08:40:36,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-03 08:40:36,606 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-03 08:40:36,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:36,607 INFO L225 Difference]: With dead ends: 71 [2018-10-03 08:40:36,607 INFO L226 Difference]: Without dead ends: 69 [2018-10-03 08:40:36,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:40:36,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-03 08:40:36,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-03 08:40:36,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-03 08:40:36,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-03 08:40:36,610 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-10-03 08:40:36,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:36,611 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-03 08:40:36,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-03 08:40:36,611 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-03 08:40:36,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-03 08:40:36,611 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:36,611 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-10-03 08:40:36,611 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:36,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:36,612 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-10-03 08:40:36,612 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:36,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:36,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:36,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:36,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:36,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:37,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:37,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:37,085 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:40:37,092 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:40:37,117 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:40:37,118 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:37,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:37,163 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:37,163 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-03 08:40:37,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-03 08:40:37,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-03 08:40:37,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:40:37,165 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-10-03 08:40:37,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:37,240 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-03 08:40:37,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-03 08:40:37,240 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-10-03 08:40:37,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:37,241 INFO L225 Difference]: With dead ends: 73 [2018-10-03 08:40:37,241 INFO L226 Difference]: Without dead ends: 71 [2018-10-03 08:40:37,242 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:40:37,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-03 08:40:37,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-03 08:40:37,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-03 08:40:37,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-03 08:40:37,246 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-10-03 08:40:37,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:37,246 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-03 08:40:37,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-03 08:40:37,246 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-03 08:40:37,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-03 08:40:37,247 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:37,247 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-10-03 08:40:37,247 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:37,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:37,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-10-03 08:40:37,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:37,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:37,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:37,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:37,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:37,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:37,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:37,929 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:40:37,936 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:40:38,045 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-03 08:40:38,045 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:38,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:38,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:38,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:38,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-03 08:40:38,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-03 08:40:38,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-03 08:40:38,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:40:38,080 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-10-03 08:40:38,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:38,154 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-03 08:40:38,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-03 08:40:38,154 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-03 08:40:38,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:38,155 INFO L225 Difference]: With dead ends: 75 [2018-10-03 08:40:38,156 INFO L226 Difference]: Without dead ends: 73 [2018-10-03 08:40:38,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:40:38,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-03 08:40:38,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-03 08:40:38,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-03 08:40:38,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-03 08:40:38,160 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-10-03 08:40:38,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:38,160 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-03 08:40:38,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-03 08:40:38,160 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-03 08:40:38,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-03 08:40:38,160 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:38,161 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-10-03 08:40:38,161 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:38,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:38,161 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-10-03 08:40:38,161 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:38,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:38,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:38,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:38,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:38,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:38,955 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 [2018-10-03 08:40:38,962 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:40:38,991 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:40:38,991 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:38,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:39,027 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:39,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-03 08:40:39,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-03 08:40:39,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-03 08:40:39,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:40:39,028 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-10-03 08:40:39,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:39,196 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-03 08:40:39,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-03 08:40:39,196 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-10-03 08:40:39,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:39,197 INFO L225 Difference]: With dead ends: 77 [2018-10-03 08:40:39,197 INFO L226 Difference]: Without dead ends: 75 [2018-10-03 08:40:39,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:40:39,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-03 08:40:39,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-03 08:40:39,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-03 08:40:39,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-03 08:40:39,202 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-10-03 08:40:39,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:39,203 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-03 08:40:39,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-03 08:40:39,203 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-03 08:40:39,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-03 08:40:39,203 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:39,204 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-10-03 08:40:39,204 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:39,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:39,204 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-10-03 08:40:39,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:39,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:39,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:39,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:39,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:39,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:39,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:39,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:39,926 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 [2018-10-03 08:40:39,934 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:40:40,223 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-03 08:40:40,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:40,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:40,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:40,261 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:40,261 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-03 08:40:40,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 08:40:40,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 08:40:40,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:40:40,262 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-10-03 08:40:40,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:40,322 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-03 08:40:40,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-03 08:40:40,323 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-03 08:40:40,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:40,324 INFO L225 Difference]: With dead ends: 79 [2018-10-03 08:40:40,324 INFO L226 Difference]: Without dead ends: 77 [2018-10-03 08:40:40,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:40:40,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-03 08:40:40,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-03 08:40:40,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-03 08:40:40,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-03 08:40:40,328 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-10-03 08:40:40,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:40,328 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-03 08:40:40,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 08:40:40,329 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-03 08:40:40,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-03 08:40:40,329 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:40,329 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-10-03 08:40:40,329 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:40,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:40,329 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-10-03 08:40:40,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:40,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:40,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:40,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:40,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:40,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:41,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:41,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:41,773 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 [2018-10-03 08:40:41,781 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:40:41,914 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-03 08:40:41,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:41,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:41,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:41,965 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:41,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-03 08:40:41,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-03 08:40:41,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-03 08:40:41,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:40:41,967 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-10-03 08:40:42,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:42,643 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-03 08:40:42,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-03 08:40:42,644 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-10-03 08:40:42,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:42,645 INFO L225 Difference]: With dead ends: 81 [2018-10-03 08:40:42,645 INFO L226 Difference]: Without dead ends: 79 [2018-10-03 08:40:42,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:40:42,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-03 08:40:42,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-03 08:40:42,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-03 08:40:42,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-03 08:40:42,649 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-10-03 08:40:42,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:42,650 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-03 08:40:42,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-03 08:40:42,650 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-03 08:40:42,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-03 08:40:42,651 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:42,651 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-10-03 08:40:42,651 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:42,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:42,651 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-10-03 08:40:42,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:42,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:42,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:42,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:42,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:42,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:43,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:43,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:43,912 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:43,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:43,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:43,983 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:43,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-03 08:40:43,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-03 08:40:43,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-03 08:40:43,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:40:43,985 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-10-03 08:40:44,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:44,063 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-03 08:40:44,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-03 08:40:44,064 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-03 08:40:44,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:44,065 INFO L225 Difference]: With dead ends: 83 [2018-10-03 08:40:44,065 INFO L226 Difference]: Without dead ends: 81 [2018-10-03 08:40:44,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:40:44,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-03 08:40:44,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-03 08:40:44,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-03 08:40:44,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-03 08:40:44,068 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-10-03 08:40:44,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:44,068 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-03 08:40:44,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-03 08:40:44,068 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-03 08:40:44,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-03 08:40:44,069 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:44,069 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-10-03 08:40:44,069 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:44,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:44,069 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-10-03 08:40:44,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:44,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:44,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:44,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:44,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:44,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:44,820 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:44,820 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:40:44,827 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:40:44,855 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:40:44,855 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:44,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:44,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:44,897 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:44,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-03 08:40:44,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-03 08:40:44,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-03 08:40:44,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:40:44,898 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-10-03 08:40:44,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:44,983 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-03 08:40:44,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-03 08:40:44,984 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-10-03 08:40:44,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:44,985 INFO L225 Difference]: With dead ends: 85 [2018-10-03 08:40:44,985 INFO L226 Difference]: Without dead ends: 83 [2018-10-03 08:40:44,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:40:44,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-03 08:40:44,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-03 08:40:44,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-03 08:40:44,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-03 08:40:44,989 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-10-03 08:40:44,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:44,990 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-03 08:40:44,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-03 08:40:44,990 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-03 08:40:44,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-03 08:40:44,990 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:44,990 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-10-03 08:40:44,990 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:44,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:44,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-10-03 08:40:44,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:44,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:44,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:44,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:44,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:45,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:45,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:45,758 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 [2018-10-03 08:40:45,778 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:40:45,947 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-03 08:40:45,947 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:45,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:45,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:45,985 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:45,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-03 08:40:45,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-03 08:40:45,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-03 08:40:45,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:40:45,987 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-10-03 08:40:46,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:46,130 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-03 08:40:46,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-03 08:40:46,130 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-03 08:40:46,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:46,131 INFO L225 Difference]: With dead ends: 87 [2018-10-03 08:40:46,131 INFO L226 Difference]: Without dead ends: 85 [2018-10-03 08:40:46,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:40:46,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-03 08:40:46,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-03 08:40:46,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-03 08:40:46,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-10-03 08:40:46,134 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-10-03 08:40:46,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:46,134 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-10-03 08:40:46,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-03 08:40:46,134 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-10-03 08:40:46,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-03 08:40:46,134 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:46,135 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-10-03 08:40:46,135 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:46,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:46,135 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-10-03 08:40:46,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:46,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:46,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:46,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:46,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:46,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:46,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:46,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:46,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:40:46,963 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:40:47,017 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:40:47,018 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:47,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:47,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:47,069 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:47,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-03 08:40:47,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-03 08:40:47,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-03 08:40:47,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:40:47,070 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-10-03 08:40:47,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:47,173 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-03 08:40:47,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-03 08:40:47,174 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-10-03 08:40:47,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:47,175 INFO L225 Difference]: With dead ends: 89 [2018-10-03 08:40:47,175 INFO L226 Difference]: Without dead ends: 87 [2018-10-03 08:40:47,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:40:47,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-03 08:40:47,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-03 08:40:47,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-03 08:40:47,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-03 08:40:47,180 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-10-03 08:40:47,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:47,180 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-03 08:40:47,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-03 08:40:47,180 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-03 08:40:47,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-03 08:40:47,181 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:47,181 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-10-03 08:40:47,181 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:47,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:47,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-10-03 08:40:47,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:47,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:47,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:47,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:47,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:47,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:47,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:47,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:47,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:40:47,964 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:40:48,455 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-03 08:40:48,455 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:48,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:48,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:48,506 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:48,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-03 08:40:48,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-03 08:40:48,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-03 08:40:48,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:40:48,508 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-10-03 08:40:48,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:48,606 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-03 08:40:48,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 08:40:48,606 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-03 08:40:48,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:48,607 INFO L225 Difference]: With dead ends: 91 [2018-10-03 08:40:48,608 INFO L226 Difference]: Without dead ends: 89 [2018-10-03 08:40:48,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:40:48,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-03 08:40:48,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-03 08:40:48,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-03 08:40:48,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-03 08:40:48,612 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-10-03 08:40:48,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:48,612 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-03 08:40:48,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-03 08:40:48,612 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-03 08:40:48,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-03 08:40:48,613 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:48,613 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-10-03 08:40:48,613 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:48,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:48,614 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-10-03 08:40:48,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:48,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:48,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:48,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:48,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:49,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:49,429 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:40:49,436 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:40:49,621 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-03 08:40:49,621 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:49,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:49,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:49,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:49,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-03 08:40:49,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-03 08:40:49,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-03 08:40:49,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:40:49,663 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-10-03 08:40:49,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:49,723 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-03 08:40:49,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-03 08:40:49,723 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-10-03 08:40:49,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:49,725 INFO L225 Difference]: With dead ends: 93 [2018-10-03 08:40:49,725 INFO L226 Difference]: Without dead ends: 91 [2018-10-03 08:40:49,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:40:49,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-03 08:40:49,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-03 08:40:49,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-03 08:40:49,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-03 08:40:49,730 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-10-03 08:40:49,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:49,730 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-03 08:40:49,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-03 08:40:49,730 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-03 08:40:49,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-03 08:40:49,730 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:49,731 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-10-03 08:40:49,731 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:49,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:49,731 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-10-03 08:40:49,731 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:49,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:49,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:49,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:49,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:50,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:50,715 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:50,715 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:40:50,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:50,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:50,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:50,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:50,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:50,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-03 08:40:50,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-03 08:40:50,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-03 08:40:50,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:40:50,816 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-10-03 08:40:50,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:50,913 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-03 08:40:50,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-03 08:40:50,914 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-03 08:40:50,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:50,915 INFO L225 Difference]: With dead ends: 95 [2018-10-03 08:40:50,915 INFO L226 Difference]: Without dead ends: 93 [2018-10-03 08:40:50,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:40:50,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-03 08:40:50,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-03 08:40:50,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-03 08:40:50,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-03 08:40:50,919 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-10-03 08:40:50,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:50,919 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-03 08:40:50,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-03 08:40:50,919 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-03 08:40:50,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-03 08:40:50,920 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:50,920 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-10-03 08:40:50,920 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:50,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:50,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-10-03 08:40:50,920 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:50,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:50,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:50,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:50,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:50,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:52,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:52,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:52,169 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:40:52,177 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:40:52,212 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:40:52,212 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:52,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:52,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:52,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:52,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-03 08:40:52,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 08:40:52,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 08:40:52,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:40:52,257 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-10-03 08:40:52,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:52,611 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-03 08:40:52,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-03 08:40:52,611 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-10-03 08:40:52,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:52,612 INFO L225 Difference]: With dead ends: 97 [2018-10-03 08:40:52,612 INFO L226 Difference]: Without dead ends: 95 [2018-10-03 08:40:52,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:40:52,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-03 08:40:52,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-03 08:40:52,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-03 08:40:52,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-03 08:40:52,616 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-10-03 08:40:52,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:52,616 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-03 08:40:52,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 08:40:52,617 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-03 08:40:52,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-03 08:40:52,617 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:52,617 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-10-03 08:40:52,617 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:52,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:52,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-10-03 08:40:52,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:52,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:52,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:52,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:52,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:53,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:53,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:53,488 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 [2018-10-03 08:40:53,499 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:40:53,749 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-03 08:40:53,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:53,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:53,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:53,801 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:53,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-03 08:40:53,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-03 08:40:53,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-03 08:40:53,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:40:53,803 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-10-03 08:40:54,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:54,032 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-03 08:40:54,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-03 08:40:54,032 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-03 08:40:54,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:54,034 INFO L225 Difference]: With dead ends: 99 [2018-10-03 08:40:54,034 INFO L226 Difference]: Without dead ends: 97 [2018-10-03 08:40:54,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:40:54,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-03 08:40:54,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-03 08:40:54,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-03 08:40:54,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-10-03 08:40:54,038 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-10-03 08:40:54,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:54,038 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-10-03 08:40:54,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-03 08:40:54,038 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-10-03 08:40:54,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-03 08:40:54,039 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:54,039 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-10-03 08:40:54,039 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:54,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:54,039 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-10-03 08:40:54,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:54,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:54,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:54,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:54,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:54,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:55,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:55,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:55,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:40:55,098 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:40:55,133 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:40:55,133 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:55,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:55,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:55,171 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:55,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-03 08:40:55,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-03 08:40:55,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-03 08:40:55,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:40:55,173 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-10-03 08:40:55,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:55,251 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-03 08:40:55,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-03 08:40:55,252 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-10-03 08:40:55,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:55,252 INFO L225 Difference]: With dead ends: 101 [2018-10-03 08:40:55,252 INFO L226 Difference]: Without dead ends: 99 [2018-10-03 08:40:55,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:40:55,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-03 08:40:55,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-03 08:40:55,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-03 08:40:55,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-03 08:40:55,255 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-10-03 08:40:55,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:55,256 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-03 08:40:55,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-03 08:40:55,256 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-03 08:40:55,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-03 08:40:55,257 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:55,257 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-10-03 08:40:55,257 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:55,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:55,257 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-10-03 08:40:55,257 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:55,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:55,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:55,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:55,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:55,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:56,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:56,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:56,782 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 [2018-10-03 08:40:56,789 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:40:57,589 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-03 08:40:57,589 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:57,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:57,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:57,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:57,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-03 08:40:57,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-03 08:40:57,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-03 08:40:57,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:40:57,640 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-10-03 08:40:57,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:57,738 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-03 08:40:57,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-03 08:40:57,738 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-03 08:40:57,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:57,740 INFO L225 Difference]: With dead ends: 103 [2018-10-03 08:40:57,740 INFO L226 Difference]: Without dead ends: 101 [2018-10-03 08:40:57,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:40:57,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-03 08:40:57,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-03 08:40:57,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-03 08:40:57,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-03 08:40:57,744 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-10-03 08:40:57,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:57,744 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-03 08:40:57,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-03 08:40:57,744 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-03 08:40:57,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-03 08:40:57,745 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:57,745 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-10-03 08:40:57,745 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:57,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:57,745 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-10-03 08:40:57,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:57,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:57,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:57,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:57,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:59,176 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:59,176 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 [2018-10-03 08:40:59,182 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:40:59,449 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-03 08:40:59,449 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:59,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:59,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:59,493 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:59,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-03 08:40:59,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-03 08:40:59,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-03 08:40:59,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:40:59,495 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-10-03 08:40:59,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:59,604 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-03 08:40:59,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-03 08:40:59,605 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-10-03 08:40:59,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:59,605 INFO L225 Difference]: With dead ends: 105 [2018-10-03 08:40:59,606 INFO L226 Difference]: Without dead ends: 103 [2018-10-03 08:40:59,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:40:59,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-03 08:40:59,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-03 08:40:59,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-03 08:40:59,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-03 08:40:59,609 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-10-03 08:40:59,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:59,610 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-03 08:40:59,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-03 08:40:59,610 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-03 08:40:59,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-03 08:40:59,611 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:59,611 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-10-03 08:40:59,611 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:59,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:59,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-10-03 08:40:59,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:59,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:59,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:59,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:59,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:59,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:01,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:01,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:01,014 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 [2018-10-03 08:41:01,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:01,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:01,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:01,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:01,096 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:01,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-03 08:41:01,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-03 08:41:01,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-03 08:41:01,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:41:01,097 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-10-03 08:41:01,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:01,201 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-03 08:41:01,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-03 08:41:01,201 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-03 08:41:01,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:01,202 INFO L225 Difference]: With dead ends: 107 [2018-10-03 08:41:01,203 INFO L226 Difference]: Without dead ends: 105 [2018-10-03 08:41:01,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:41:01,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-03 08:41:01,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-03 08:41:01,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-03 08:41:01,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-10-03 08:41:01,207 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-10-03 08:41:01,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:01,207 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-10-03 08:41:01,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-03 08:41:01,208 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-10-03 08:41:01,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-03 08:41:01,208 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:01,208 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-10-03 08:41:01,209 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:01,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:01,209 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-10-03 08:41:01,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:01,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:01,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:01,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:01,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:02,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:02,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:02,767 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:41:02,775 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:41:02,827 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:41:02,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:02,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:02,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:02,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-03 08:41:02,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-03 08:41:02,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-03 08:41:02,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:41:02,883 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-10-03 08:41:03,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:03,103 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-03 08:41:03,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-03 08:41:03,103 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-10-03 08:41:03,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:03,105 INFO L225 Difference]: With dead ends: 109 [2018-10-03 08:41:03,105 INFO L226 Difference]: Without dead ends: 107 [2018-10-03 08:41:03,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:41:03,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-03 08:41:03,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-03 08:41:03,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-03 08:41:03,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-03 08:41:03,109 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-10-03 08:41:03,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:03,109 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-03 08:41:03,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-03 08:41:03,110 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-03 08:41:03,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-03 08:41:03,110 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:03,110 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-10-03 08:41:03,111 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:03,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:03,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-10-03 08:41:03,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:03,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:03,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:03,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:03,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:04,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:04,197 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:04,197 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 [2018-10-03 08:41:04,204 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:41:04,572 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-03 08:41:04,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:04,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:04,627 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:04,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-03 08:41:04,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-03 08:41:04,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-03 08:41:04,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:41:04,630 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-10-03 08:41:04,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:04,833 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-03 08:41:04,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-03 08:41:04,833 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-03 08:41:04,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:04,834 INFO L225 Difference]: With dead ends: 111 [2018-10-03 08:41:04,834 INFO L226 Difference]: Without dead ends: 109 [2018-10-03 08:41:04,835 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:41:04,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-03 08:41:04,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-03 08:41:04,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-03 08:41:04,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-10-03 08:41:04,837 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-10-03 08:41:04,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:04,838 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-10-03 08:41:04,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-03 08:41:04,838 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-10-03 08:41:04,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-03 08:41:04,839 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:04,839 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-10-03 08:41:04,839 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:04,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:04,839 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-10-03 08:41:04,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:04,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:04,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:04,840 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:04,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:07,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:07,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:07,259 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 [2018-10-03 08:41:07,274 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:41:07,332 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:41:07,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:07,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:07,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:07,380 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:07,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-03 08:41:07,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-03 08:41:07,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-03 08:41:07,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 08:41:07,381 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-10-03 08:41:07,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:07,498 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-03 08:41:07,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-03 08:41:07,498 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-10-03 08:41:07,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:07,499 INFO L225 Difference]: With dead ends: 113 [2018-10-03 08:41:07,499 INFO L226 Difference]: Without dead ends: 111 [2018-10-03 08:41:07,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 08:41:07,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-03 08:41:07,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-03 08:41:07,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-03 08:41:07,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-03 08:41:07,503 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-10-03 08:41:07,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:07,503 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-03 08:41:07,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-03 08:41:07,504 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-03 08:41:07,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-03 08:41:07,504 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:07,504 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-10-03 08:41:07,505 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:07,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:07,505 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-10-03 08:41:07,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:07,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:07,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:07,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:07,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:07,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:08,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:08,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:08,799 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 [2018-10-03 08:41:08,809 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:41:10,083 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-03 08:41:10,083 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:10,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:10,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:10,141 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:10,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-03 08:41:10,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-03 08:41:10,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-03 08:41:10,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 08:41:10,143 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-10-03 08:41:10,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:10,257 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-03 08:41:10,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-03 08:41:10,258 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-03 08:41:10,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:10,259 INFO L225 Difference]: With dead ends: 115 [2018-10-03 08:41:10,259 INFO L226 Difference]: Without dead ends: 113 [2018-10-03 08:41:10,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 08:41:10,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-03 08:41:10,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-03 08:41:10,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-03 08:41:10,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-03 08:41:10,264 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-10-03 08:41:10,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:10,264 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-03 08:41:10,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-03 08:41:10,264 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-03 08:41:10,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-03 08:41:10,265 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:10,265 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-10-03 08:41:10,265 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:10,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:10,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-10-03 08:41:10,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:10,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:10,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:10,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:10,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:10,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:12,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:12,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:12,450 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:41:12,458 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:41:12,831 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-03 08:41:12,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:12,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:12,892 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:12,893 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-03 08:41:12,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-03 08:41:12,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-03 08:41:12,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 08:41:12,894 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-10-03 08:41:13,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:13,125 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-03 08:41:13,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-03 08:41:13,125 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-10-03 08:41:13,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:13,127 INFO L225 Difference]: With dead ends: 117 [2018-10-03 08:41:13,127 INFO L226 Difference]: Without dead ends: 115 [2018-10-03 08:41:13,127 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 08:41:13,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-03 08:41:13,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-03 08:41:13,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-03 08:41:13,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-10-03 08:41:13,131 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-10-03 08:41:13,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:13,131 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-10-03 08:41:13,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-03 08:41:13,132 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-10-03 08:41:13,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-03 08:41:13,132 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:13,132 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-10-03 08:41:13,133 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:13,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:13,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-10-03 08:41:13,133 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:13,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:13,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:13,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:13,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:14,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:14,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:14,326 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 [2018-10-03 08:41:14,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:14,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:14,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:14,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-03 08:41:14,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-03 08:41:14,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-03 08:41:14,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 08:41:14,442 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-10-03 08:41:14,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:14,952 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-10-03 08:41:14,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-03 08:41:14,953 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-03 08:41:14,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:14,954 INFO L225 Difference]: With dead ends: 119 [2018-10-03 08:41:14,955 INFO L226 Difference]: Without dead ends: 117 [2018-10-03 08:41:14,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 08:41:14,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-03 08:41:14,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-03 08:41:14,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-03 08:41:14,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-10-03 08:41:14,959 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-10-03 08:41:14,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:14,959 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-10-03 08:41:14,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-03 08:41:14,959 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-10-03 08:41:14,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-03 08:41:14,960 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:14,960 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-10-03 08:41:14,960 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:14,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:14,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-10-03 08:41:14,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:14,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:14,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:14,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:14,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:14,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:16,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:16,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:16,379 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:41:16,387 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:41:16,426 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:41:16,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:16,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:16,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:16,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:16,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-03 08:41:16,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-03 08:41:16,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-03 08:41:16,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 08:41:16,486 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-10-03 08:41:16,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:16,810 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-03 08:41:16,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-03 08:41:16,811 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-10-03 08:41:16,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:16,812 INFO L225 Difference]: With dead ends: 121 [2018-10-03 08:41:16,812 INFO L226 Difference]: Without dead ends: 119 [2018-10-03 08:41:16,812 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 08:41:16,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-03 08:41:16,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-03 08:41:16,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-03 08:41:16,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-10-03 08:41:16,816 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-10-03 08:41:16,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:16,816 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-10-03 08:41:16,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-03 08:41:16,816 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-10-03 08:41:16,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-03 08:41:16,817 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:16,817 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-10-03 08:41:16,817 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:16,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:16,818 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-10-03 08:41:16,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:16,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:16,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:16,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:16,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:18,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:18,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:18,298 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 [2018-10-03 08:41:18,306 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:41:18,830 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-03 08:41:18,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:18,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:18,894 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:18,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-03 08:41:18,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-03 08:41:18,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-03 08:41:18,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-03 08:41:18,895 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-10-03 08:41:20,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:20,271 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-10-03 08:41:20,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-03 08:41:20,271 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-10-03 08:41:20,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:20,272 INFO L225 Difference]: With dead ends: 123 [2018-10-03 08:41:20,272 INFO L226 Difference]: Without dead ends: 121 [2018-10-03 08:41:20,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-03 08:41:20,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-03 08:41:20,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-03 08:41:20,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-03 08:41:20,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-10-03 08:41:20,276 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-10-03 08:41:20,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:20,276 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-10-03 08:41:20,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-03 08:41:20,276 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-10-03 08:41:20,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-03 08:41:20,277 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:20,277 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-10-03 08:41:20,277 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:20,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:20,278 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-10-03 08:41:20,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:20,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:20,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:20,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:20,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:20,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:22,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:22,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:22,404 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:41:22,413 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:41:22,457 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:41:22,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:22,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:22,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:22,502 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:22,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-03 08:41:22,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-03 08:41:22,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-03 08:41:22,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-03 08:41:22,503 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-10-03 08:41:22,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:22,632 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-10-03 08:41:22,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-03 08:41:22,632 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-10-03 08:41:22,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:22,633 INFO L225 Difference]: With dead ends: 125 [2018-10-03 08:41:22,633 INFO L226 Difference]: Without dead ends: 123 [2018-10-03 08:41:22,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-03 08:41:22,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-03 08:41:22,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-03 08:41:22,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-03 08:41:22,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-10-03 08:41:22,636 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-10-03 08:41:22,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:22,637 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-10-03 08:41:22,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-03 08:41:22,637 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-10-03 08:41:22,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-03 08:41:22,637 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:22,638 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-10-03 08:41:22,638 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:22,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:22,638 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-10-03 08:41:22,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:22,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:22,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:22,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:22,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:22,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:24,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:24,301 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:24,301 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:41:24,308 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:41:26,251 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-03 08:41:26,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:26,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:26,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:26,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-03 08:41:26,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-03 08:41:26,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-03 08:41:26,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 08:41:26,312 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-10-03 08:41:26,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:26,448 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-03 08:41:26,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-03 08:41:26,448 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-10-03 08:41:26,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:26,449 INFO L225 Difference]: With dead ends: 127 [2018-10-03 08:41:26,449 INFO L226 Difference]: Without dead ends: 125 [2018-10-03 08:41:26,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 08:41:26,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-03 08:41:26,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-03 08:41:26,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-03 08:41:26,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-10-03 08:41:26,454 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-10-03 08:41:26,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:26,454 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-10-03 08:41:26,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-03 08:41:26,454 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-10-03 08:41:26,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-03 08:41:26,455 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:26,455 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-10-03 08:41:26,455 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:26,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:26,455 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-10-03 08:41:26,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:26,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:26,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:26,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:26,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:28,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:28,470 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:28,470 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 [2018-10-03 08:41:28,477 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:41:28,994 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-03 08:41:28,994 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:28,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:29,057 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:29,057 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-03 08:41:29,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-03 08:41:29,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-03 08:41:29,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-03 08:41:29,059 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-10-03 08:41:29,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:29,233 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-10-03 08:41:29,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-03 08:41:29,233 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-10-03 08:41:29,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:29,234 INFO L225 Difference]: With dead ends: 129 [2018-10-03 08:41:29,234 INFO L226 Difference]: Without dead ends: 127 [2018-10-03 08:41:29,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-03 08:41:29,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-03 08:41:29,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-03 08:41:29,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-03 08:41:29,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-10-03 08:41:29,237 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-10-03 08:41:29,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:29,237 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-10-03 08:41:29,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-03 08:41:29,237 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-10-03 08:41:29,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-03 08:41:29,238 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:29,238 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-10-03 08:41:29,238 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:29,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:29,239 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-10-03 08:41:29,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:29,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:29,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:29,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:29,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:29,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:30,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:30,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:30,811 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:41:30,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:30,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:30,917 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:30,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-03 08:41:30,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-03 08:41:30,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-03 08:41:30,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-03 08:41:30,918 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-10-03 08:41:31,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:31,094 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-10-03 08:41:31,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-03 08:41:31,094 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-10-03 08:41:31,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:31,095 INFO L225 Difference]: With dead ends: 131 [2018-10-03 08:41:31,095 INFO L226 Difference]: Without dead ends: 129 [2018-10-03 08:41:31,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-03 08:41:31,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-03 08:41:31,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-03 08:41:31,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-03 08:41:31,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-10-03 08:41:31,098 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-10-03 08:41:31,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:31,098 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-10-03 08:41:31,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-03 08:41:31,098 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-10-03 08:41:31,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-03 08:41:31,099 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:31,099 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-10-03 08:41:31,099 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:31,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:31,099 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-10-03 08:41:31,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:31,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:31,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:31,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:31,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:31,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:33,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:33,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:33,044 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 [2018-10-03 08:41:33,052 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:41:33,098 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:41:33,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:33,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:33,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:33,159 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:33,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-03 08:41:33,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-03 08:41:33,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-03 08:41:33,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-03 08:41:33,161 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-10-03 08:41:33,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:33,275 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-03 08:41:33,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-03 08:41:33,275 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-10-03 08:41:33,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:33,276 INFO L225 Difference]: With dead ends: 133 [2018-10-03 08:41:33,276 INFO L226 Difference]: Without dead ends: 131 [2018-10-03 08:41:33,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-03 08:41:33,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-03 08:41:33,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-03 08:41:33,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-03 08:41:33,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-10-03 08:41:33,280 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-10-03 08:41:33,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:33,281 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-10-03 08:41:33,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-03 08:41:33,281 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-10-03 08:41:33,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-03 08:41:33,281 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:33,281 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-10-03 08:41:33,282 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:33,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:33,282 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-10-03 08:41:33,282 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:33,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:33,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:33,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:33,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:33,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:34,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:34,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:34,854 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 [2018-10-03 08:41:34,864 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:41:35,603 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-03 08:41:35,604 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:35,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:35,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:35,651 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:35,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-03 08:41:35,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-03 08:41:35,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-03 08:41:35,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-03 08:41:35,652 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-10-03 08:41:35,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:35,798 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-10-03 08:41:35,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-03 08:41:35,798 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-10-03 08:41:35,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:35,799 INFO L225 Difference]: With dead ends: 135 [2018-10-03 08:41:35,799 INFO L226 Difference]: Without dead ends: 133 [2018-10-03 08:41:35,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-03 08:41:35,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-03 08:41:35,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-03 08:41:35,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-03 08:41:35,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-10-03 08:41:35,804 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-10-03 08:41:35,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:35,804 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-10-03 08:41:35,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-03 08:41:35,804 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-10-03 08:41:35,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-03 08:41:35,805 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:35,805 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-10-03 08:41:35,805 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:35,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:35,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-10-03 08:41:35,806 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:35,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:35,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:35,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:35,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:35,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:37,634 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:37,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:41:37,644 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:41:37,713 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:41:37,714 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:37,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:37,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:37,787 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:37,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-03 08:41:37,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-03 08:41:37,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-03 08:41:37,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-03 08:41:37,790 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-10-03 08:41:38,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:38,147 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-03 08:41:38,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-03 08:41:38,148 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-10-03 08:41:38,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:38,149 INFO L225 Difference]: With dead ends: 137 [2018-10-03 08:41:38,149 INFO L226 Difference]: Without dead ends: 135 [2018-10-03 08:41:38,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-03 08:41:38,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-03 08:41:38,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-10-03 08:41:38,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-03 08:41:38,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-10-03 08:41:38,153 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-10-03 08:41:38,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:38,154 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-10-03 08:41:38,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-03 08:41:38,154 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-10-03 08:41:38,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-03 08:41:38,154 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:38,154 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-10-03 08:41:38,154 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:38,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:38,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-10-03 08:41:38,155 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:38,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:38,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:38,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:38,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:38,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:39,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:39,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:39,783 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 [2018-10-03 08:41:39,790 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:41:42,608 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-03 08:41:42,608 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:42,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:42,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:42,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:42,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-03 08:41:42,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-03 08:41:42,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-03 08:41:42,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-03 08:41:42,678 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-10-03 08:41:43,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:43,567 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-03 08:41:43,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-03 08:41:43,567 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-10-03 08:41:43,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:43,569 INFO L225 Difference]: With dead ends: 139 [2018-10-03 08:41:43,569 INFO L226 Difference]: Without dead ends: 137 [2018-10-03 08:41:43,569 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-03 08:41:43,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-03 08:41:43,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-03 08:41:43,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-03 08:41:43,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-10-03 08:41:43,572 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-10-03 08:41:43,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:43,573 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-10-03 08:41:43,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-03 08:41:43,573 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-10-03 08:41:43,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-03 08:41:43,573 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:43,573 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-10-03 08:41:43,574 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:43,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:43,574 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-10-03 08:41:43,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:43,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:43,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:43,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:43,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:45,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:45,417 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:45,417 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:41:45,426 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:41:46,135 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-03 08:41:46,135 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:46,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:46,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:46,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:46,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-03 08:41:46,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-03 08:41:46,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-03 08:41:46,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-03 08:41:46,203 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-10-03 08:41:46,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:46,329 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-10-03 08:41:46,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-03 08:41:46,329 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-10-03 08:41:46,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:46,330 INFO L225 Difference]: With dead ends: 141 [2018-10-03 08:41:46,331 INFO L226 Difference]: Without dead ends: 139 [2018-10-03 08:41:46,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-03 08:41:46,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-03 08:41:46,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-03 08:41:46,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-03 08:41:46,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-10-03 08:41:46,335 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-10-03 08:41:46,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:46,335 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-10-03 08:41:46,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-03 08:41:46,335 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-10-03 08:41:46,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-03 08:41:46,336 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:46,336 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-10-03 08:41:46,336 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:46,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:46,336 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-10-03 08:41:46,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:46,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:46,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:46,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:46,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:46,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:48,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:48,338 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 [2018-10-03 08:41:48,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:48,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:48,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:48,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:48,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:48,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-03 08:41:48,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-03 08:41:48,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-03 08:41:48,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-03 08:41:48,442 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-10-03 08:41:48,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:48,580 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-10-03 08:41:48,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-03 08:41:48,581 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-10-03 08:41:48,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:48,582 INFO L225 Difference]: With dead ends: 143 [2018-10-03 08:41:48,582 INFO L226 Difference]: Without dead ends: 141 [2018-10-03 08:41:48,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-03 08:41:48,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-03 08:41:48,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-03 08:41:48,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-03 08:41:48,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-10-03 08:41:48,586 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-10-03 08:41:48,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:48,586 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-10-03 08:41:48,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-03 08:41:48,586 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-10-03 08:41:48,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-03 08:41:48,587 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:48,587 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-10-03 08:41:48,588 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:48,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:48,588 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-10-03 08:41:48,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:48,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:48,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:48,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:48,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:48,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:50,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:50,382 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:50,382 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:41:50,388 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:41:50,442 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:41:50,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:50,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:50,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:50,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:50,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-03 08:41:50,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-03 08:41:50,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-03 08:41:50,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-03 08:41:50,489 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-10-03 08:41:50,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:50,600 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-03 08:41:50,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-03 08:41:50,601 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-10-03 08:41:50,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:50,602 INFO L225 Difference]: With dead ends: 145 [2018-10-03 08:41:50,602 INFO L226 Difference]: Without dead ends: 143 [2018-10-03 08:41:50,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-03 08:41:50,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-03 08:41:50,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-03 08:41:50,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-03 08:41:50,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-03 08:41:50,606 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-10-03 08:41:50,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:50,606 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-03 08:41:50,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-03 08:41:50,606 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-03 08:41:50,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-03 08:41:50,607 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:50,607 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-10-03 08:41:50,607 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:50,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:50,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-10-03 08:41:50,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:50,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:50,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:50,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:50,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:50,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:52,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:52,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:52,403 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:41:52,411 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:41:53,434 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-03 08:41:53,434 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:53,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:53,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:53,506 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:53,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-03 08:41:53,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-03 08:41:53,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-03 08:41:53,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-03 08:41:53,508 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-10-03 08:41:53,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:53,769 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-10-03 08:41:53,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-03 08:41:53,770 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-10-03 08:41:53,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:53,770 INFO L225 Difference]: With dead ends: 147 [2018-10-03 08:41:53,771 INFO L226 Difference]: Without dead ends: 145 [2018-10-03 08:41:53,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-03 08:41:53,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-03 08:41:53,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-03 08:41:53,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-03 08:41:53,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-10-03 08:41:53,774 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-10-03 08:41:53,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:53,775 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-10-03 08:41:53,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-03 08:41:53,775 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-10-03 08:41:53,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-03 08:41:53,775 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:53,775 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-10-03 08:41:53,776 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:53,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:53,776 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-10-03 08:41:53,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:53,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:53,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:53,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:53,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:55,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:55,627 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:55,627 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:41:55,635 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:41:55,688 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:41:55,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:55,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:55,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:55,755 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:55,755 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-03 08:41:55,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-03 08:41:55,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-03 08:41:55,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-03 08:41:55,756 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-10-03 08:41:55,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:55,985 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-10-03 08:41:55,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-03 08:41:55,985 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-10-03 08:41:55,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:55,986 INFO L225 Difference]: With dead ends: 149 [2018-10-03 08:41:55,986 INFO L226 Difference]: Without dead ends: 147 [2018-10-03 08:41:55,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-03 08:41:55,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-03 08:41:55,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-03 08:41:55,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-03 08:41:55,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-10-03 08:41:55,991 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-10-03 08:41:55,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:55,991 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-10-03 08:41:55,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-03 08:41:55,991 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-10-03 08:41:55,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-03 08:41:55,991 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:55,992 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-10-03 08:41:55,992 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:55,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:55,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-10-03 08:41:55,992 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:55,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:55,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:55,993 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:55,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:56,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:58,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:58,163 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:58,164 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:41:58,171 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:42:02,142 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-03 08:42:02,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:02,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:02,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:02,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-03 08:42:02,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-03 08:42:02,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-03 08:42:02,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-03 08:42:02,213 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-10-03 08:42:02,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:02,373 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-03 08:42:02,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-03 08:42:02,373 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-10-03 08:42:02,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:02,374 INFO L225 Difference]: With dead ends: 151 [2018-10-03 08:42:02,374 INFO L226 Difference]: Without dead ends: 149 [2018-10-03 08:42:02,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-03 08:42:02,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-03 08:42:02,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-03 08:42:02,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-03 08:42:02,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-10-03 08:42:02,379 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-10-03 08:42:02,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:02,380 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-10-03 08:42:02,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-03 08:42:02,380 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-10-03 08:42:02,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-03 08:42:02,381 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:02,381 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-10-03 08:42:02,381 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:02,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:02,381 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-10-03 08:42:02,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:02,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:02,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:02,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:02,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:04,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:04,662 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:42:04,668 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:42:05,601 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-03 08:42:05,602 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:05,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:05,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:05,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:05,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-03 08:42:05,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-03 08:42:05,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-03 08:42:05,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-03 08:42:05,661 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-10-03 08:42:05,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:05,799 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-10-03 08:42:05,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-03 08:42:05,799 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-10-03 08:42:05,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:05,801 INFO L225 Difference]: With dead ends: 153 [2018-10-03 08:42:05,801 INFO L226 Difference]: Without dead ends: 151 [2018-10-03 08:42:05,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-03 08:42:05,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-03 08:42:05,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-03 08:42:05,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-03 08:42:05,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-10-03 08:42:05,806 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-10-03 08:42:05,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:05,806 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-10-03 08:42:05,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-03 08:42:05,806 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-10-03 08:42:05,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-03 08:42:05,807 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:05,807 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-10-03 08:42:05,807 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:05,808 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:05,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-10-03 08:42:05,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:05,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:05,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:05,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:05,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:07,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:07,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:07,865 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:42:07,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:42:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:07,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:07,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:07,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:07,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-03 08:42:07,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-03 08:42:07,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-03 08:42:07,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-03 08:42:07,991 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-10-03 08:42:08,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:08,280 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-10-03 08:42:08,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-03 08:42:08,280 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-10-03 08:42:08,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:08,281 INFO L225 Difference]: With dead ends: 155 [2018-10-03 08:42:08,281 INFO L226 Difference]: Without dead ends: 153 [2018-10-03 08:42:08,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-03 08:42:08,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-03 08:42:08,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-03 08:42:08,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-03 08:42:08,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-10-03 08:42:08,285 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-10-03 08:42:08,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:08,286 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-10-03 08:42:08,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-03 08:42:08,286 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-10-03 08:42:08,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-03 08:42:08,286 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:08,287 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-10-03 08:42:08,287 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:08,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:08,287 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-10-03 08:42:08,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:08,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:08,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:08,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:42:08,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:10,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:10,372 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:10,372 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 [2018-10-03 08:42:10,379 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:42:10,434 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:42:10,434 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:10,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:10,502 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:10,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-03 08:42:10,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-03 08:42:10,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-03 08:42:10,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-03 08:42:10,503 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2018-10-03 08:42:10,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:10,852 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-03 08:42:10,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-03 08:42:10,852 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-10-03 08:42:10,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:10,853 INFO L225 Difference]: With dead ends: 157 [2018-10-03 08:42:10,853 INFO L226 Difference]: Without dead ends: 155 [2018-10-03 08:42:10,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-03 08:42:10,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-03 08:42:10,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-03 08:42:10,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-03 08:42:10,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-10-03 08:42:10,856 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2018-10-03 08:42:10,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:10,856 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-10-03 08:42:10,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-03 08:42:10,856 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-10-03 08:42:10,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-03 08:42:10,857 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:10,857 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-10-03 08:42:10,857 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:10,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:10,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 75 times [2018-10-03 08:42:10,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:10,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:10,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:10,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:10,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:12,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:12,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:12,950 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 [2018-10-03 08:42:12,956 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:42:14,361 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-03 08:42:14,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:14,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:14,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:14,419 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:14,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-03 08:42:14,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-03 08:42:14,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-03 08:42:14,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-03 08:42:14,421 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2018-10-03 08:42:14,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:14,631 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-10-03 08:42:14,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-03 08:42:14,631 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-10-03 08:42:14,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:14,632 INFO L225 Difference]: With dead ends: 159 [2018-10-03 08:42:14,632 INFO L226 Difference]: Without dead ends: 157 [2018-10-03 08:42:14,633 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-03 08:42:14,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-03 08:42:14,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-03 08:42:14,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-03 08:42:14,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-10-03 08:42:14,635 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2018-10-03 08:42:14,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:14,635 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-10-03 08:42:14,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-03 08:42:14,635 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-10-03 08:42:14,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-03 08:42:14,636 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:14,636 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1] [2018-10-03 08:42:14,636 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:14,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:14,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1961675265, now seen corresponding path program 76 times [2018-10-03 08:42:14,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:14,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:14,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:14,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:14,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:14,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:16,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:16,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:16,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:42:16,795 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:42:16,851 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:42:16,851 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:16,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:16,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:16,920 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:16,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-03 08:42:16,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-03 08:42:16,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-03 08:42:16,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-03 08:42:16,922 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2018-10-03 08:42:17,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:17,127 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-10-03 08:42:17,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-03 08:42:17,127 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-10-03 08:42:17,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:17,128 INFO L225 Difference]: With dead ends: 161 [2018-10-03 08:42:17,128 INFO L226 Difference]: Without dead ends: 159 [2018-10-03 08:42:17,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-03 08:42:17,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-03 08:42:17,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-10-03 08:42:17,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-03 08:42:17,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-10-03 08:42:17,131 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2018-10-03 08:42:17,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:17,131 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-10-03 08:42:17,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-03 08:42:17,131 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-10-03 08:42:17,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-03 08:42:17,132 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:17,132 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-10-03 08:42:17,132 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:17,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:17,132 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 77 times [2018-10-03 08:42:17,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:17,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:17,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:17,133 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:17,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:17,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:19,764 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:19,764 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 [2018-10-03 08:42:19,772 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:42:25,157 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-03 08:42:25,158 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:25,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:25,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:25,215 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:25,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-03 08:42:25,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-03 08:42:25,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-03 08:42:25,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-03 08:42:25,217 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2018-10-03 08:42:25,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:25,701 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-10-03 08:42:25,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-03 08:42:25,702 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-10-03 08:42:25,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:25,703 INFO L225 Difference]: With dead ends: 163 [2018-10-03 08:42:25,703 INFO L226 Difference]: Without dead ends: 161 [2018-10-03 08:42:25,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-03 08:42:25,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-03 08:42:25,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-10-03 08:42:25,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-03 08:42:25,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-10-03 08:42:25,707 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2018-10-03 08:42:25,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:25,708 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-10-03 08:42:25,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-03 08:42:25,708 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-10-03 08:42:25,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-03 08:42:25,709 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:25,709 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1] [2018-10-03 08:42:25,709 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:25,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:25,710 INFO L82 PathProgramCache]: Analyzing trace with hash -982073613, now seen corresponding path program 78 times [2018-10-03 08:42:25,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:25,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:25,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:25,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:25,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:25,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:28,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:28,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:28,190 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:42:28,197 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:42:29,430 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-03 08:42:29,430 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:29,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:29,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:29,487 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:29,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-03 08:42:29,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-03 08:42:29,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-03 08:42:29,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-03 08:42:29,489 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2018-10-03 08:42:29,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:29,641 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-10-03 08:42:29,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-03 08:42:29,641 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-10-03 08:42:29,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:29,642 INFO L225 Difference]: With dead ends: 165 [2018-10-03 08:42:29,642 INFO L226 Difference]: Without dead ends: 163 [2018-10-03 08:42:29,643 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-03 08:42:29,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-03 08:42:29,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-10-03 08:42:29,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-03 08:42:29,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-10-03 08:42:29,646 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2018-10-03 08:42:29,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:29,646 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-10-03 08:42:29,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-03 08:42:29,647 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-10-03 08:42:29,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-03 08:42:29,647 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:29,647 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-10-03 08:42:29,648 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:29,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:29,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 79 times [2018-10-03 08:42:29,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:29,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:29,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:29,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:29,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:29,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:32,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:32,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:32,060 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:42:32,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:42:32,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:32,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:32,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:32,185 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:32,185 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-03 08:42:32,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-03 08:42:32,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-03 08:42:32,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-03 08:42:32,186 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2018-10-03 08:42:32,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:32,420 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-10-03 08:42:32,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-03 08:42:32,420 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-10-03 08:42:32,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:32,421 INFO L225 Difference]: With dead ends: 167 [2018-10-03 08:42:32,421 INFO L226 Difference]: Without dead ends: 165 [2018-10-03 08:42:32,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-03 08:42:32,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-03 08:42:32,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-03 08:42:32,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-03 08:42:32,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-10-03 08:42:32,425 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2018-10-03 08:42:32,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:32,425 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-10-03 08:42:32,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-03 08:42:32,425 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-10-03 08:42:32,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-03 08:42:32,426 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:32,426 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1] [2018-10-03 08:42:32,426 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:32,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:32,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1606111769, now seen corresponding path program 80 times [2018-10-03 08:42:32,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:32,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:32,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:32,427 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:42:32,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:35,147 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:35,147 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:42:35,165 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:42:35,224 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:42:35,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:35,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:35,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:35,293 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:35,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-03 08:42:35,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-03 08:42:35,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-03 08:42:35,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-03 08:42:35,294 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2018-10-03 08:42:35,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:35,450 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-10-03 08:42:35,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-03 08:42:35,450 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-10-03 08:42:35,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:35,451 INFO L225 Difference]: With dead ends: 169 [2018-10-03 08:42:35,451 INFO L226 Difference]: Without dead ends: 167 [2018-10-03 08:42:35,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-03 08:42:35,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-03 08:42:35,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-10-03 08:42:35,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-03 08:42:35,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-10-03 08:42:35,454 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2018-10-03 08:42:35,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:35,454 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-10-03 08:42:35,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-03 08:42:35,454 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-10-03 08:42:35,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-03 08:42:35,455 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:35,455 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-10-03 08:42:35,455 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:35,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:35,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 81 times [2018-10-03 08:42:35,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:35,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:35,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:35,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:35,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:38,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:38,005 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 [2018-10-03 08:42:38,015 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:42:40,062 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-10-03 08:42:40,062 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:40,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:40,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:40,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:40,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-03 08:42:40,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-03 08:42:40,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-03 08:42:40,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-03 08:42:40,125 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2018-10-03 08:42:40,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:40,311 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-10-03 08:42:40,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-03 08:42:40,311 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-10-03 08:42:40,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:40,312 INFO L225 Difference]: With dead ends: 171 [2018-10-03 08:42:40,312 INFO L226 Difference]: Without dead ends: 169 [2018-10-03 08:42:40,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-03 08:42:40,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-03 08:42:40,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-10-03 08:42:40,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-03 08:42:40,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-10-03 08:42:40,316 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2018-10-03 08:42:40,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:40,316 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-10-03 08:42:40,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-03 08:42:40,317 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-10-03 08:42:40,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-03 08:42:40,317 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:40,317 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1] [2018-10-03 08:42:40,317 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:40,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:40,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1943667419, now seen corresponding path program 82 times [2018-10-03 08:42:40,318 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:40,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:40,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:40,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:40,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:42,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:42,796 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:42,796 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 [2018-10-03 08:42:42,805 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:42:42,867 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:42:42,867 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:42,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:42,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:42,938 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:42,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-03 08:42:42,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-03 08:42:42,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-03 08:42:42,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-03 08:42:42,941 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2018-10-03 08:42:43,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:43,224 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-10-03 08:42:43,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-03 08:42:43,224 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-10-03 08:42:43,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:43,225 INFO L225 Difference]: With dead ends: 173 [2018-10-03 08:42:43,225 INFO L226 Difference]: Without dead ends: 171 [2018-10-03 08:42:43,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-03 08:42:43,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-03 08:42:43,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-10-03 08:42:43,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-03 08:42:43,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-10-03 08:42:43,229 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2018-10-03 08:42:43,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:43,229 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-10-03 08:42:43,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-03 08:42:43,229 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-10-03 08:42:43,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-03 08:42:43,230 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:43,230 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-10-03 08:42:43,230 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:43,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:43,230 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 83 times [2018-10-03 08:42:43,230 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:43,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:43,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:43,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:43,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:43,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:46,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:46,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:46,218 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 [2018-10-03 08:42:46,225 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:42:54,251 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-10-03 08:42:54,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:54,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:54,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:54,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-03 08:42:54,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-03 08:42:54,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-03 08:42:54,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-03 08:42:54,315 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2018-10-03 08:42:54,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:54,599 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-10-03 08:42:54,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-03 08:42:54,600 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-10-03 08:42:54,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:54,601 INFO L225 Difference]: With dead ends: 175 [2018-10-03 08:42:54,601 INFO L226 Difference]: Without dead ends: 173 [2018-10-03 08:42:54,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-03 08:42:54,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-03 08:42:54,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-10-03 08:42:54,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-03 08:42:54,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-10-03 08:42:54,605 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2018-10-03 08:42:54,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:54,606 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-10-03 08:42:54,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-03 08:42:54,606 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-10-03 08:42:54,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-03 08:42:54,607 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:54,607 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1] [2018-10-03 08:42:54,607 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:54,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:54,607 INFO L82 PathProgramCache]: Analyzing trace with hash 571719119, now seen corresponding path program 84 times [2018-10-03 08:42:54,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:54,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:54,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:54,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:54,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:57,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:57,190 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:42:57,197 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:42:58,881 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-10-03 08:42:58,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:58,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:58,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:58,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:58,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-03 08:42:58,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-03 08:42:58,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-03 08:42:58,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-03 08:42:58,942 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2018-10-03 08:42:59,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:59,399 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-10-03 08:42:59,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-03 08:42:59,399 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-10-03 08:42:59,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:59,400 INFO L225 Difference]: With dead ends: 177 [2018-10-03 08:42:59,400 INFO L226 Difference]: Without dead ends: 175 [2018-10-03 08:42:59,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-03 08:42:59,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-03 08:42:59,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-10-03 08:42:59,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-03 08:42:59,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-10-03 08:42:59,404 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2018-10-03 08:42:59,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:59,404 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-10-03 08:42:59,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-03 08:42:59,405 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-10-03 08:42:59,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-03 08:42:59,405 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:59,406 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-10-03 08:42:59,406 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:59,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:59,406 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 85 times [2018-10-03 08:42:59,406 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:59,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:59,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:59,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:59,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:59,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:02,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:02,352 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:02,352 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:43:02,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:02,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:02,459 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:02,479 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:02,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-03 08:43:02,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-03 08:43:02,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-03 08:43:02,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-03 08:43:02,481 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2018-10-03 08:43:02,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:02,749 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-10-03 08:43:02,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-03 08:43:02,750 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-10-03 08:43:02,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:02,751 INFO L225 Difference]: With dead ends: 179 [2018-10-03 08:43:02,751 INFO L226 Difference]: Without dead ends: 177 [2018-10-03 08:43:02,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-03 08:43:02,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-03 08:43:02,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-10-03 08:43:02,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-10-03 08:43:02,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-10-03 08:43:02,754 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2018-10-03 08:43:02,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:02,755 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-10-03 08:43:02,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-03 08:43:02,755 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-10-03 08:43:02,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-03 08:43:02,756 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:02,756 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1] [2018-10-03 08:43:02,756 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:02,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:02,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1448009411, now seen corresponding path program 86 times [2018-10-03 08:43:02,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:02,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:02,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:02,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:02,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:05,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:05,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:05,793 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 [2018-10-03 08:43:05,800 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:43:05,876 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:43:05,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:05,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:05,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:05,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:05,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-03 08:43:05,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-03 08:43:05,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-03 08:43:05,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-03 08:43:05,934 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2018-10-03 08:43:06,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:06,106 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-10-03 08:43:06,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-03 08:43:06,106 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-10-03 08:43:06,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:06,108 INFO L225 Difference]: With dead ends: 181 [2018-10-03 08:43:06,108 INFO L226 Difference]: Without dead ends: 179 [2018-10-03 08:43:06,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-03 08:43:06,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-03 08:43:06,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-10-03 08:43:06,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-03 08:43:06,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-10-03 08:43:06,112 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2018-10-03 08:43:06,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:06,112 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-10-03 08:43:06,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-03 08:43:06,112 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-10-03 08:43:06,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-03 08:43:06,113 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:06,113 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-10-03 08:43:06,113 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:06,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:06,113 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 87 times [2018-10-03 08:43:06,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:06,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:06,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:06,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:06,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:08,834 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:08,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:08,835 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:43:08,846 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:43:11,360 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-10-03 08:43:11,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:11,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:11,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:11,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:11,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-03 08:43:11,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-03 08:43:11,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-03 08:43:11,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-03 08:43:11,426 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2018-10-03 08:43:11,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:11,721 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-10-03 08:43:11,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-03 08:43:11,722 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-10-03 08:43:11,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:11,723 INFO L225 Difference]: With dead ends: 183 [2018-10-03 08:43:11,723 INFO L226 Difference]: Without dead ends: 181 [2018-10-03 08:43:11,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-03 08:43:11,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-03 08:43:11,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-03 08:43:11,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-03 08:43:11,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-10-03 08:43:11,727 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2018-10-03 08:43:11,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:11,727 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-10-03 08:43:11,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-03 08:43:11,727 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-10-03 08:43:11,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-03 08:43:11,728 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:11,728 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1] [2018-10-03 08:43:11,728 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:11,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:11,729 INFO L82 PathProgramCache]: Analyzing trace with hash -983013961, now seen corresponding path program 88 times [2018-10-03 08:43:11,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:11,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:11,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:11,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:11,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:11,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:14,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:14,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:14,660 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 [2018-10-03 08:43:14,667 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:43:14,731 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:43:14,731 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:14,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:14,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:14,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-03 08:43:14,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-03 08:43:14,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-03 08:43:14,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-03 08:43:14,788 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2018-10-03 08:43:14,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:15,000 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-10-03 08:43:15,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-03 08:43:15,000 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-10-03 08:43:15,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:15,001 INFO L225 Difference]: With dead ends: 185 [2018-10-03 08:43:15,001 INFO L226 Difference]: Without dead ends: 183 [2018-10-03 08:43:15,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-03 08:43:15,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-03 08:43:15,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-10-03 08:43:15,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-03 08:43:15,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-10-03 08:43:15,005 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2018-10-03 08:43:15,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:15,005 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-10-03 08:43:15,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-03 08:43:15,005 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-10-03 08:43:15,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-03 08:43:15,006 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:15,006 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-10-03 08:43:15,006 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:15,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:15,006 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 89 times [2018-10-03 08:43:15,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:15,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:15,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:15,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:15,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:15,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:17,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:17,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:17,946 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 [2018-10-03 08:43:17,954 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:43:27,676 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-10-03 08:43:27,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:27,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:27,719 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:27,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:27,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-03 08:43:27,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-03 08:43:27,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-03 08:43:27,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-03 08:43:27,744 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2018-10-03 08:43:28,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:28,033 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-10-03 08:43:28,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-03 08:43:28,033 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-10-03 08:43:28,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:28,034 INFO L225 Difference]: With dead ends: 187 [2018-10-03 08:43:28,034 INFO L226 Difference]: Without dead ends: 185 [2018-10-03 08:43:28,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-03 08:43:28,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-03 08:43:28,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-10-03 08:43:28,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-03 08:43:28,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-10-03 08:43:28,039 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2018-10-03 08:43:28,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:28,039 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-10-03 08:43:28,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-03 08:43:28,040 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-10-03 08:43:28,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-03 08:43:28,040 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:28,041 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1] [2018-10-03 08:43:28,041 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:28,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:28,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1841124011, now seen corresponding path program 90 times [2018-10-03 08:43:28,041 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:28,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:28,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:28,042 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:28,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:31,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:31,233 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 [2018-10-03 08:43:31,240 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:43:33,361 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-10-03 08:43:33,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:33,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:33,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:33,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:33,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-03 08:43:33,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-03 08:43:33,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-03 08:43:33,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-03 08:43:33,426 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2018-10-03 08:43:33,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:33,660 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-10-03 08:43:33,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-03 08:43:33,660 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2018-10-03 08:43:33,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:33,661 INFO L225 Difference]: With dead ends: 189 [2018-10-03 08:43:33,661 INFO L226 Difference]: Without dead ends: 187 [2018-10-03 08:43:33,662 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-03 08:43:33,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-03 08:43:33,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-10-03 08:43:33,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-03 08:43:33,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-10-03 08:43:33,666 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2018-10-03 08:43:33,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:33,666 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-10-03 08:43:33,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-03 08:43:33,667 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-10-03 08:43:33,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-03 08:43:33,668 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:33,668 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-10-03 08:43:33,668 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:33,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:33,668 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 91 times [2018-10-03 08:43:33,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:33,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:33,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:33,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:33,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:36,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:36,889 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:36,890 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 [2018-10-03 08:43:36,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:36,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:37,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:37,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:37,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-03 08:43:37,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-03 08:43:37,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-03 08:43:37,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-03 08:43:37,034 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2018-10-03 08:43:37,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:37,214 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-10-03 08:43:37,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-03 08:43:37,214 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-10-03 08:43:37,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:37,215 INFO L225 Difference]: With dead ends: 191 [2018-10-03 08:43:37,215 INFO L226 Difference]: Without dead ends: 189 [2018-10-03 08:43:37,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-03 08:43:37,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-03 08:43:37,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-10-03 08:43:37,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-03 08:43:37,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-10-03 08:43:37,220 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2018-10-03 08:43:37,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:37,221 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-10-03 08:43:37,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-03 08:43:37,221 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-10-03 08:43:37,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-03 08:43:37,222 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:37,222 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1] [2018-10-03 08:43:37,222 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:37,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:37,222 INFO L82 PathProgramCache]: Analyzing trace with hash -685070945, now seen corresponding path program 92 times [2018-10-03 08:43:37,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:37,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:37,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:37,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:37,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:37,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:41,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:41,294 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:43:41,302 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:43:41,371 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:43:41,371 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:41,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:41,431 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:41,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-03 08:43:41,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-03 08:43:41,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-03 08:43:41,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-03 08:43:41,433 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2018-10-03 08:43:41,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:41,598 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-10-03 08:43:41,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-03 08:43:41,599 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2018-10-03 08:43:41,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:41,600 INFO L225 Difference]: With dead ends: 193 [2018-10-03 08:43:41,600 INFO L226 Difference]: Without dead ends: 191 [2018-10-03 08:43:41,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-03 08:43:41,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-03 08:43:41,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-10-03 08:43:41,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-03 08:43:41,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-10-03 08:43:41,604 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2018-10-03 08:43:41,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:41,605 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-10-03 08:43:41,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-03 08:43:41,605 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-10-03 08:43:41,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-03 08:43:41,606 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:41,606 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1] [2018-10-03 08:43:41,606 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:41,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:41,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1223129767, now seen corresponding path program 93 times [2018-10-03 08:43:41,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:41,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:41,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:41,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:41,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:41,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:44,764 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:44,764 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 [2018-10-03 08:43:44,772 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:43:47,956 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-10-03 08:43:47,956 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:47,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:48,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:48,030 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:48,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-03 08:43:48,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-03 08:43:48,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-03 08:43:48,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-03 08:43:48,032 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2018-10-03 08:43:48,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:48,222 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-10-03 08:43:48,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-03 08:43:48,223 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-10-03 08:43:48,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:48,224 INFO L225 Difference]: With dead ends: 195 [2018-10-03 08:43:48,224 INFO L226 Difference]: Without dead ends: 193 [2018-10-03 08:43:48,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-03 08:43:48,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-03 08:43:48,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-10-03 08:43:48,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-03 08:43:48,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-10-03 08:43:48,227 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2018-10-03 08:43:48,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:48,227 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-10-03 08:43:48,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-03 08:43:48,227 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-10-03 08:43:48,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-03 08:43:48,228 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:48,228 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1] [2018-10-03 08:43:48,228 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:48,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:48,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1393385107, now seen corresponding path program 94 times [2018-10-03 08:43:48,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:48,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:48,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:48,229 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:48,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:51,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:51,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:51,611 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 [2018-10-03 08:43:51,619 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:43:51,688 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:43:51,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:51,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:51,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:51,765 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:51,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-03 08:43:51,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-03 08:43:51,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-03 08:43:51,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-03 08:43:51,767 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2018-10-03 08:43:52,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:52,083 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-10-03 08:43:52,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-03 08:43:52,083 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2018-10-03 08:43:52,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:52,084 INFO L225 Difference]: With dead ends: 197 [2018-10-03 08:43:52,084 INFO L226 Difference]: Without dead ends: 195 [2018-10-03 08:43:52,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-03 08:43:52,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-03 08:43:52,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-10-03 08:43:52,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-03 08:43:52,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-10-03 08:43:52,088 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2018-10-03 08:43:52,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:52,088 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-10-03 08:43:52,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-03 08:43:52,088 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-10-03 08:43:52,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-03 08:43:52,089 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:52,089 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1] [2018-10-03 08:43:52,089 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:52,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:52,089 INFO L82 PathProgramCache]: Analyzing trace with hash -986656435, now seen corresponding path program 95 times [2018-10-03 08:43:52,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:52,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:52,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:52,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:52,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:55,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:55,381 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:55,381 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 [2018-10-03 08:43:55,390 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:44:08,164 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-10-03 08:44:08,164 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:08,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:08,209 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:08,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:08,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-03 08:44:08,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-03 08:44:08,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-03 08:44:08,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-03 08:44:08,237 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 98 states. [2018-10-03 08:44:08,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:08,552 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-10-03 08:44:08,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-03 08:44:08,553 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-10-03 08:44:08,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:08,554 INFO L225 Difference]: With dead ends: 199 [2018-10-03 08:44:08,554 INFO L226 Difference]: Without dead ends: 197 [2018-10-03 08:44:08,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-03 08:44:08,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-10-03 08:44:08,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-10-03 08:44:08,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-03 08:44:08,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-10-03 08:44:08,559 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2018-10-03 08:44:08,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:08,559 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-10-03 08:44:08,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-03 08:44:08,559 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-10-03 08:44:08,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-03 08:44:08,560 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:08,560 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1] [2018-10-03 08:44:08,560 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:08,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:08,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1010990471, now seen corresponding path program 96 times [2018-10-03 08:44:08,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:08,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:08,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:08,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:08,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:08,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:12,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:12,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:12,219 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 [2018-10-03 08:44:12,238 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:44:14,929 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-10-03 08:44:14,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:14,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:14,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:14,999 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:14,999 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-10-03 08:44:15,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-03 08:44:15,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-03 08:44:15,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-03 08:44:15,000 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 99 states. [2018-10-03 08:44:15,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:15,194 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-10-03 08:44:15,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-03 08:44:15,194 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 196 [2018-10-03 08:44:15,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:15,195 INFO L225 Difference]: With dead ends: 201 [2018-10-03 08:44:15,195 INFO L226 Difference]: Without dead ends: 199 [2018-10-03 08:44:15,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-03 08:44:15,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-03 08:44:15,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-10-03 08:44:15,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-03 08:44:15,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-10-03 08:44:15,200 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2018-10-03 08:44:15,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:15,200 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-10-03 08:44:15,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-03 08:44:15,200 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-10-03 08:44:15,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-03 08:44:15,201 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:15,201 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1] [2018-10-03 08:44:15,201 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:15,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:15,201 INFO L82 PathProgramCache]: Analyzing trace with hash 899285825, now seen corresponding path program 97 times [2018-10-03 08:44:15,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:15,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:15,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:15,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:15,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:18,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:18,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:18,799 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 [2018-10-03 08:44:18,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:44:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:18,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:18,953 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:18,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-03 08:44:18,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-03 08:44:18,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-03 08:44:18,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-03 08:44:18,955 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 100 states. [2018-10-03 08:44:19,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:19,271 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-10-03 08:44:19,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-03 08:44:19,271 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2018-10-03 08:44:19,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:19,272 INFO L225 Difference]: With dead ends: 203 [2018-10-03 08:44:19,272 INFO L226 Difference]: Without dead ends: 201 [2018-10-03 08:44:19,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-03 08:44:19,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-03 08:44:19,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-10-03 08:44:19,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-10-03 08:44:19,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2018-10-03 08:44:19,275 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2018-10-03 08:44:19,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:19,276 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2018-10-03 08:44:19,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-03 08:44:19,276 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2018-10-03 08:44:19,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-03 08:44:19,276 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:19,276 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1] [2018-10-03 08:44:19,277 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:19,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:19,277 INFO L82 PathProgramCache]: Analyzing trace with hash 925303419, now seen corresponding path program 98 times [2018-10-03 08:44:19,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:19,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:19,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:19,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:44:19,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-03 08:44:20,236 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-03 08:44:20,242 WARN L205 ceAbstractionStarter]: Timeout [2018-10-03 08:44:20,242 INFO L202 PluginConnector]: Adding new model array1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 08:44:20 BoogieIcfgContainer [2018-10-03 08:44:20,242 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-03 08:44:20,243 INFO L168 Benchmark]: Toolchain (without parser) took 243943.08 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -51.4 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 411.8 MB). Peak memory consumption was 360.4 MB. Max. memory is 7.1 GB. [2018-10-03 08:44:20,244 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:44:20,244 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.47 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:44:20,244 INFO L168 Benchmark]: Boogie Preprocessor took 20.16 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:44:20,245 INFO L168 Benchmark]: RCFGBuilder took 314.97 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-03 08:44:20,245 INFO L168 Benchmark]: TraceAbstraction took 243560.14 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -51.4 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 390.6 MB). Peak memory consumption was 339.3 MB. Max. memory is 7.1 GB. [2018-10-03 08:44:20,247 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.47 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.16 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 314.97 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 243560.14 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -51.4 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 390.6 MB). Peak memory consumption was 339.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 37]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 37). Cancelled while BasicCegarLoop was analyzing trace of length 201 with TraceHistMax 99, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 52 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 243.4s OverallTime, 99 OverallIterations, 99 TraceHistogramMax, 18.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 392 SDtfs, 0 SDslu, 8034 SDs, 0 SdLazy, 8132 SolverSat, 160 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14746 GetRequests, 9895 SyntacticMatches, 0 SemanticMatches, 4851 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 138.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=201occurred in iteration=98, 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, 98 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.8s SsaConstructionTime, 74.0s SatisfiabilityAnalysisTime, 143.5s InterpolantComputationTime, 19792 NumberOfCodeBlocks, 19792 NumberOfCodeBlocksAsserted, 2611 NumberOfCheckSat, 19597 ConstructedInterpolants, 0 QuantifiedInterpolants, 7722967 SizeOfPredicates, 97 NumberOfNonLiveVariables, 25026 ConjunctsInSsa, 4947 ConjunctsInUnsatCore, 195 InterpolantComputations, 1 PerfectInterpolantSequences, 0/627396 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/array1.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-03_08-44-20-256.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/array1.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-03_08-44-20-256.csv Completed graceful shutdown