java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/array2.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:45:48,736 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:45:48,738 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:45:48,750 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:45:48,751 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:45:48,752 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:45:48,753 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:45:48,755 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:45:48,757 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:45:48,758 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:45:48,759 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-26 21:45:48,759 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-26 21:45:48,760 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-26 21:45:48,761 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-26 21:45:48,762 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-26 21:45:48,763 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-26 21:45:48,764 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-26 21:45:48,766 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-26 21:45:48,768 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-26 21:45:48,769 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-26 21:45:48,775 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-26 21:45:48,776 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-26 21:45:48,782 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-26 21:45:48,799 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-26 21:45:48,822 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:45:48,822 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:45:48,823 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:45:48,823 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:45:48,824 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:45:48,824 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:45:48,824 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:45:48,824 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:45:48,825 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:45:48,825 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:45:48,825 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:45:48,825 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:45:48,825 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:45:48,826 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:45:48,826 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:45:48,826 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:45:48,826 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:45:48,826 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:45:48,827 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:45:48,827 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:45:48,827 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:45:48,827 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:45:48,828 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:45:48,828 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:45:48,828 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:45:48,828 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:45:48,828 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:45:48,829 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:45:48,829 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:45:48,829 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:45:48,829 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-26 21:45:48,904 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:45:48,924 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:45:48,931 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:45:48,933 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:45:48,933 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:45:48,934 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array2.i_3.bpl [2018-09-26 21:45:48,934 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array2.i_3.bpl' [2018-09-26 21:45:48,992 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:45:48,995 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:45:48,996 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:45:48,996 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:45:48,996 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:45:49,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:48" (1/1) ... [2018-09-26 21:45:49,032 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:48" (1/1) ... [2018-09-26 21:45:49,040 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:45:49,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:45:49,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:45:49,041 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:45:49,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:48" (1/1) ... [2018-09-26 21:45:49,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:48" (1/1) ... [2018-09-26 21:45:49,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:48" (1/1) ... [2018-09-26 21:45:49,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:48" (1/1) ... [2018-09-26 21:45:49,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:48" (1/1) ... [2018-09-26 21:45:49,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:48" (1/1) ... [2018-09-26 21:45:49,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:48" (1/1) ... [2018-09-26 21:45:49,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:45:49,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:45:49,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:45:49,063 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:45:49,064 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:45:49,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-26 21:45:49,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-26 21:45:49,365 INFO L346 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-26 21:45:49,366 INFO L202 PluginConnector]: Adding new model array2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:45:49 BoogieIcfgContainer [2018-09-26 21:45:49,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:45:49,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:45:49,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:45:49,372 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:45:49,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:48" (1/2) ... [2018-09-26 21:45:49,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d144f86 and model type array2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:45:49, skipping insertion in model container [2018-09-26 21:45:49,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:45:49" (2/2) ... [2018-09-26 21:45:49,377 INFO L112 eAbstractionObserver]: Analyzing ICFG array2.i_3.bpl [2018-09-26 21:45:49,387 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:45:49,394 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:45:49,450 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:45:49,451 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:45:49,451 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:45:49,452 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:45:49,452 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:45:49,452 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:45:49,452 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:45:49,452 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:45:49,453 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:45:49,468 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-26 21:45:49,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-26 21:45:49,474 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:49,475 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-26 21:45:49,476 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:49,484 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:49,485 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-26 21:45:49,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:49,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:49,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:49,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:49,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:49,617 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:45:49,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-26 21:45:49,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:45:49,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:45:49,636 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:49,639 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-26 21:45:49,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:49,773 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-26 21:45:49,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:45:49,775 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-26 21:45:49,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:49,788 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:45:49,789 INFO L226 Difference]: Without dead ends: 7 [2018-09-26 21:45:49,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:49,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-26 21:45:49,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-26 21:45:49,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-26 21:45:49,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-26 21:45:49,830 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-26 21:45:49,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:49,831 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-26 21:45:49,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:45:49,831 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-26 21:45:49,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 21:45:49,832 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:49,832 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-26 21:45:49,832 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:49,832 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:49,833 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-26 21:45:49,833 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:49,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:49,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:49,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:49,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:49,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:49,927 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:49,928 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:49,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:49,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:49,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:50,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:50,183 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:50,184 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-26 21:45:50,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:45:50,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:45:50,185 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:50,185 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-09-26 21:45:50,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:50,367 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-26 21:45:50,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:45:50,368 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-26 21:45:50,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:50,369 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:45:50,369 INFO L226 Difference]: Without dead ends: 9 [2018-09-26 21:45:50,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:50,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-26 21:45:50,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-26 21:45:50,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-26 21:45:50,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-26 21:45:50,373 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-26 21:45:50,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:50,373 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-26 21:45:50,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:45:50,374 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-26 21:45:50,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:45:50,374 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:50,375 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-26 21:45:50,375 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:50,375 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:50,375 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-09-26 21:45:50,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:50,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:50,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:50,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:50,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:50,443 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:50,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:50,460 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:45:50,477 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:45:50,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:50,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:50,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:50,581 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:50,582 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-26 21:45:50,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:45:50,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:45:50,583 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:50,583 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-09-26 21:45:50,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:50,702 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-26 21:45:50,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:45:50,707 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-26 21:45:50,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:50,708 INFO L225 Difference]: With dead ends: 13 [2018-09-26 21:45:50,708 INFO L226 Difference]: Without dead ends: 11 [2018-09-26 21:45:50,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:50,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-26 21:45:50,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-26 21:45:50,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-26 21:45:50,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-26 21:45:50,712 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-26 21:45:50,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:50,712 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-26 21:45:50,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:45:50,713 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-26 21:45:50,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:45:50,713 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:50,714 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-26 21:45:50,714 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:50,714 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:50,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-09-26 21:45:50,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:50,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:50,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:50,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:50,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:50,991 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:50,991 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:51,010 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:45:51,031 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-26 21:45:51,031 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:51,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:51,151 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:51,177 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:51,177 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:45:51,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:45:51,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:45:51,178 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:51,179 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-09-26 21:45:51,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:51,265 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-26 21:45:51,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:45:51,267 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-26 21:45:51,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:51,269 INFO L225 Difference]: With dead ends: 15 [2018-09-26 21:45:51,269 INFO L226 Difference]: Without dead ends: 13 [2018-09-26 21:45:51,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:51,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-26 21:45:51,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-26 21:45:51,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-26 21:45:51,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-26 21:45:51,276 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-26 21:45:51,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:51,276 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-26 21:45:51,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:45:51,277 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-26 21:45:51,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-26 21:45:51,277 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:51,278 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-26 21:45:51,278 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:51,278 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:51,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-09-26 21:45:51,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:51,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:51,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:51,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:51,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:51,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:51,434 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:51,434 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:51,443 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:45:51,474 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:45:51,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:51,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:51,572 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:51,572 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:45:51,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:45:51,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:45:51,573 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:51,573 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-09-26 21:45:51,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:51,643 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-26 21:45:51,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:45:51,644 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-26 21:45:51,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:51,645 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:45:51,645 INFO L226 Difference]: Without dead ends: 15 [2018-09-26 21:45:51,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:51,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-26 21:45:51,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-26 21:45:51,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-26 21:45:51,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-26 21:45:51,650 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-26 21:45:51,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:51,650 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-26 21:45:51,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:45:51,651 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-26 21:45:51,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:45:51,651 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:51,651 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-26 21:45:51,652 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:51,652 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:51,652 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-09-26 21:45:51,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:51,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:51,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:51,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:51,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:51,786 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:51,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:51,801 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:45:51,845 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-26 21:45:51,846 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:51,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:52,029 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:52,067 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:52,067 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:45:52,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:45:52,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:45:52,068 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:52,068 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-09-26 21:45:52,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:52,386 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-26 21:45:52,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:45:52,387 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-26 21:45:52,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:52,388 INFO L225 Difference]: With dead ends: 19 [2018-09-26 21:45:52,388 INFO L226 Difference]: Without dead ends: 17 [2018-09-26 21:45:52,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:52,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-26 21:45:52,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-26 21:45:52,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-26 21:45:52,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-26 21:45:52,393 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-26 21:45:52,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:52,394 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-26 21:45:52,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:45:52,394 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-26 21:45:52,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-26 21:45:52,395 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:52,395 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-09-26 21:45:52,395 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:52,395 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:52,396 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-09-26 21:45:52,396 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:52,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:52,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:52,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:52,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:52,516 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:52,517 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:52,529 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:45:52,544 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:45:52,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:52,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:52,653 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:52,674 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:52,674 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:45:52,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:45:52,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:45:52,675 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:52,676 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-09-26 21:45:52,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:52,794 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-26 21:45:52,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:45:52,795 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-26 21:45:52,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:52,796 INFO L225 Difference]: With dead ends: 21 [2018-09-26 21:45:52,796 INFO L226 Difference]: Without dead ends: 19 [2018-09-26 21:45:52,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:52,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-26 21:45:52,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-26 21:45:52,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-26 21:45:52,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-26 21:45:52,800 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-26 21:45:52,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:52,801 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-26 21:45:52,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:45:52,801 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-26 21:45:52,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:45:52,802 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:52,802 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-26 21:45:52,802 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:52,802 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:52,802 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-09-26 21:45:52,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:52,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:52,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:52,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:52,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:52,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:52,916 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:52,917 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:52,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:52,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:52,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:53,056 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:53,081 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:53,081 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:45:53,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:45:53,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:45:53,082 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:53,082 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-09-26 21:45:53,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:53,139 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-26 21:45:53,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:45:53,139 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-26 21:45:53,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:53,141 INFO L225 Difference]: With dead ends: 23 [2018-09-26 21:45:53,141 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 21:45:53,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:53,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 21:45:53,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-26 21:45:53,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-26 21:45:53,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-26 21:45:53,146 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-26 21:45:53,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:53,147 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-26 21:45:53,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:45:53,147 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-26 21:45:53,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-26 21:45:53,148 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:53,148 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-09-26 21:45:53,148 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:53,148 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:53,148 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-09-26 21:45:53,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:53,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:53,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:53,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:53,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:53,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:53,431 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:53,432 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:53,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:53,449 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:45:53,494 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:45:53,495 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:53,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:53,918 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:53,939 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:53,940 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:45:53,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:45:53,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:45:53,941 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:53,941 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-09-26 21:45:54,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:54,131 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-26 21:45:54,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:45:54,133 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-26 21:45:54,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:54,134 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:45:54,134 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:45:54,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:54,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:45:54,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-26 21:45:54,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-26 21:45:54,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-26 21:45:54,138 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-26 21:45:54,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:54,139 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-26 21:45:54,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:45:54,139 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-26 21:45:54,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 21:45:54,140 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:54,140 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-26 21:45:54,140 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:54,140 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:54,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-09-26 21:45:54,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:54,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:54,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:54,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:54,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:54,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:54,277 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:54,278 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:54,278 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:54,288 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:45:54,314 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-26 21:45:54,314 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:54,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:54,447 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:54,468 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:54,468 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-26 21:45:54,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:45:54,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:45:54,469 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:54,469 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-09-26 21:45:54,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:54,553 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-26 21:45:54,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:45:54,554 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-26 21:45:54,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:54,555 INFO L225 Difference]: With dead ends: 27 [2018-09-26 21:45:54,556 INFO L226 Difference]: Without dead ends: 25 [2018-09-26 21:45:54,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:54,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-26 21:45:54,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-26 21:45:54,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-26 21:45:54,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-26 21:45:54,561 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-26 21:45:54,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:54,561 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-26 21:45:54,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:45:54,561 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-26 21:45:54,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-26 21:45:54,562 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:54,562 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-09-26 21:45:54,562 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:54,562 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:54,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-09-26 21:45:54,563 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:54,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:54,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:54,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:54,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:54,717 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:54,717 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:54,717 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:54,725 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:45:54,742 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:45:54,743 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:54,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:54,810 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:54,831 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:54,832 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-26 21:45:54,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:45:54,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:45:54,832 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:54,833 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-09-26 21:45:54,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:54,924 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-26 21:45:54,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:45:54,925 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-26 21:45:54,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:54,926 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:45:54,926 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:45:54,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:54,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:45:54,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-26 21:45:54,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-26 21:45:54,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-26 21:45:54,933 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-26 21:45:54,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:54,933 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-26 21:45:54,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:45:54,934 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-26 21:45:54,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-26 21:45:54,934 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:54,935 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-09-26 21:45:54,935 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:54,935 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:54,935 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-09-26 21:45:54,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:54,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:54,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:54,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:54,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:55,061 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:55,062 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:55,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:55,070 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:45:55,098 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-26 21:45:55,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:55,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:55,549 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:55,588 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:55,588 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-26 21:45:55,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:45:55,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:45:55,589 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:55,590 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-09-26 21:45:56,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:56,698 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-26 21:45:56,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:45:56,699 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-26 21:45:56,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:56,699 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:45:56,699 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:45:56,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:56,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:45:56,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-26 21:45:56,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-26 21:45:56,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-26 21:45:56,704 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-26 21:45:56,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:56,704 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-26 21:45:56,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:45:56,705 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-26 21:45:56,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-26 21:45:56,705 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:56,705 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-09-26 21:45:56,706 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:56,706 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:56,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-09-26 21:45:56,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:56,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:56,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:56,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:56,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:56,823 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:56,823 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:56,839 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:45:57,010 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-26 21:45:57,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:57,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:57,383 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:57,404 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:57,405 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-26 21:45:57,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:45:57,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:45:57,405 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:57,405 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-09-26 21:45:57,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:57,673 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-26 21:45:57,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:45:57,675 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-26 21:45:57,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:57,676 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:45:57,676 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:45:57,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:57,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:45:57,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-26 21:45:57,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-26 21:45:57,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-26 21:45:57,681 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-26 21:45:57,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:57,681 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-26 21:45:57,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:45:57,681 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-26 21:45:57,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-26 21:45:57,682 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:57,682 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-09-26 21:45:57,682 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:57,682 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:57,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-09-26 21:45:57,683 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:57,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:57,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:57,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:57,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:57,900 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:57,900 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:57,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:57,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:57,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:58,075 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:58,096 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:58,097 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-26 21:45:58,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:45:58,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:45:58,097 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:58,098 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-09-26 21:45:58,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:58,253 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-26 21:45:58,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:45:58,254 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-26 21:45:58,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:58,255 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:45:58,255 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:45:58,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:58,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:45:58,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-26 21:45:58,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-26 21:45:58,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-26 21:45:58,261 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-26 21:45:58,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:58,261 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-26 21:45:58,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:45:58,261 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-26 21:45:58,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-26 21:45:58,262 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:58,262 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-09-26 21:45:58,262 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:58,262 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:58,263 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-09-26 21:45:58,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:58,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:58,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:58,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:58,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:58,521 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:58,522 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:58,522 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:58,533 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:45:58,551 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:45:58,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:58,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:58,707 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:58,728 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:58,728 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-26 21:45:58,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:45:58,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:45:58,729 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:58,729 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-09-26 21:45:58,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:58,894 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-26 21:45:58,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:45:58,895 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-26 21:45:58,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:58,895 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:45:58,895 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:45:58,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:58,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:45:58,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-26 21:45:58,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-26 21:45:58,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-26 21:45:58,901 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-26 21:45:58,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:58,901 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-26 21:45:58,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:45:58,901 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-26 21:45:58,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-26 21:45:58,902 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:58,902 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-09-26 21:45:58,902 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:58,904 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:58,904 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-09-26 21:45:58,904 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:58,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:58,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:58,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:58,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:58,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:59,042 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:59,042 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:59,052 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:45:59,100 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-26 21:45:59,100 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:59,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:59,246 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:59,267 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:59,267 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-26 21:45:59,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:45:59,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:45:59,268 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:59,268 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-09-26 21:45:59,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:59,399 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-26 21:45:59,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:45:59,400 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-26 21:45:59,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:59,401 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:45:59,401 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:45:59,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:59,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:45:59,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-26 21:45:59,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-26 21:45:59,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-26 21:45:59,406 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-09-26 21:45:59,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:59,406 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-26 21:45:59,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:45:59,406 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-26 21:45:59,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-26 21:45:59,407 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:59,407 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-09-26 21:45:59,407 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:59,408 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:59,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-09-26 21:45:59,408 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:59,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:59,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:59,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:59,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:59,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:59,559 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:59,559 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:59,575 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:45:59,620 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:45:59,620 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:59,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:00,438 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:00,458 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:00,458 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-26 21:46:00,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-26 21:46:00,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-26 21:46:00,459 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:00,459 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-09-26 21:46:00,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:00,643 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-26 21:46:00,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:46:00,645 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-26 21:46:00,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:00,645 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:46:00,645 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:46:00,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:00,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:46:00,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-26 21:46:00,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-26 21:46:00,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-26 21:46:00,650 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-09-26 21:46:00,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:00,650 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-26 21:46:00,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-26 21:46:00,650 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-26 21:46:00,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-26 21:46:00,651 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:00,651 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-09-26 21:46:00,651 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:00,651 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:00,652 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-09-26 21:46:00,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:00,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:00,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:00,653 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:00,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:00,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:00,821 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:00,821 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:00,821 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:00,829 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:46:00,880 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-26 21:46:00,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:00,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:01,136 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:01,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:01,159 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-26 21:46:01,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:46:01,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:46:01,159 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:01,160 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-09-26 21:46:01,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:01,282 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-26 21:46:01,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:46:01,282 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-26 21:46:01,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:01,283 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:46:01,283 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:46:01,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:01,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:46:01,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-26 21:46:01,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-26 21:46:01,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-26 21:46:01,288 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-09-26 21:46:01,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:01,289 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-26 21:46:01,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:46:01,289 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-26 21:46:01,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-26 21:46:01,290 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:01,290 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-09-26 21:46:01,290 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:01,290 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:01,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-09-26 21:46:01,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:01,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:01,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:01,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:01,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:02,054 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:02,054 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:02,062 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:46:02,157 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-26 21:46:02,158 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:02,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:02,589 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:02,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:02,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-26 21:46:02,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-26 21:46:02,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-26 21:46:02,627 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:02,627 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-09-26 21:46:03,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:03,032 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-26 21:46:03,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:46:03,032 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-26 21:46:03,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:03,033 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:46:03,033 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:46:03,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:03,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:46:03,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-26 21:46:03,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-26 21:46:03,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-26 21:46:03,037 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-09-26 21:46:03,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:03,037 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-26 21:46:03,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-26 21:46:03,038 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-26 21:46:03,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-26 21:46:03,038 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:03,039 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-09-26 21:46:03,039 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:03,039 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:03,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-09-26 21:46:03,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:03,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:03,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:03,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:03,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:03,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:03,953 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:03,953 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:03,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:03,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:04,119 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:04,140 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:04,141 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-26 21:46:04,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:46:04,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:46:04,141 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:04,141 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-09-26 21:46:04,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:04,316 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-26 21:46:04,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:46:04,317 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-26 21:46:04,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:04,317 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:46:04,317 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:46:04,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:04,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:46:04,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-26 21:46:04,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-26 21:46:04,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-26 21:46:04,323 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-09-26 21:46:04,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:04,323 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-26 21:46:04,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:46:04,324 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-26 21:46:04,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-26 21:46:04,324 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:04,324 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-09-26 21:46:04,325 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:04,325 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:04,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-09-26 21:46:04,325 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:04,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:04,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:04,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:04,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:04,567 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:04,568 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:04,568 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:04,580 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:46:04,602 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:46:04,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:04,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:04,739 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:04,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:04,759 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-26 21:46:04,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:46:04,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:46:04,760 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:04,760 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-09-26 21:46:04,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:04,897 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-26 21:46:04,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:46:04,898 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-26 21:46:04,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:04,899 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:46:04,899 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:46:04,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:04,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:46:04,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-26 21:46:04,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-26 21:46:04,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-26 21:46:04,904 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-09-26 21:46:04,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:04,904 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-26 21:46:04,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:46:04,904 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-26 21:46:04,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-26 21:46:04,905 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:04,905 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-09-26 21:46:04,905 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:04,905 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:04,906 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-09-26 21:46:04,906 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:04,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:04,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:04,907 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:04,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:04,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:05,100 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:05,100 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:05,101 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:05,108 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:46:05,166 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-26 21:46:05,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:05,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:05,436 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:05,458 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:05,458 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-26 21:46:05,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:46:05,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:46:05,459 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:05,459 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-09-26 21:46:05,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:05,637 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-26 21:46:05,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:46:05,639 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-26 21:46:05,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:05,639 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:46:05,639 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:46:05,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:05,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:46:05,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-26 21:46:05,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-26 21:46:05,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-26 21:46:05,644 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-09-26 21:46:05,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:05,644 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-26 21:46:05,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:46:05,644 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-26 21:46:05,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-26 21:46:05,645 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:05,645 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-09-26 21:46:05,645 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:05,645 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:05,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-09-26 21:46:05,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:05,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:05,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:05,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:05,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:05,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:05,836 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:05,836 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:05,844 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:46:05,869 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:46:05,869 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:05,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:05,991 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:06,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:06,012 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-26 21:46:06,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-26 21:46:06,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-26 21:46:06,013 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:06,013 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-09-26 21:46:06,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:06,351 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-26 21:46:06,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:46:06,351 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-26 21:46:06,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:06,352 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:46:06,352 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:46:06,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:06,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:46:06,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-26 21:46:06,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-26 21:46:06,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-26 21:46:06,358 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-09-26 21:46:06,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:06,358 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-26 21:46:06,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-26 21:46:06,358 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-26 21:46:06,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-26 21:46:06,359 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:06,359 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-09-26 21:46:06,359 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:06,359 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:06,361 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-09-26 21:46:06,361 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:06,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:06,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:06,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:06,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:06,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:06,716 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:06,717 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:06,717 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:06,725 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:46:06,826 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-26 21:46:06,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:06,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:07,037 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:07,060 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:07,060 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-26 21:46:07,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:46:07,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:46:07,061 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:07,061 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-09-26 21:46:07,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:07,284 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-26 21:46:07,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:46:07,285 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-26 21:46:07,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:07,285 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:46:07,285 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:46:07,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:07,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:46:07,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-26 21:46:07,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-26 21:46:07,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-26 21:46:07,290 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-09-26 21:46:07,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:07,290 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-26 21:46:07,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:46:07,290 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-26 21:46:07,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-26 21:46:07,291 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:07,291 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-09-26 21:46:07,291 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:07,292 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:07,292 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-09-26 21:46:07,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:07,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:07,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:07,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:07,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:07,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:07,517 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:07,517 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:07,525 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:46:07,594 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-26 21:46:07,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:07,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:07,788 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:07,808 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:07,809 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-26 21:46:07,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-26 21:46:07,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-26 21:46:07,809 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:07,810 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-09-26 21:46:07,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:07,952 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-26 21:46:07,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:46:07,952 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-26 21:46:07,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:07,953 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:46:07,953 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:46:07,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:07,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:46:07,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-26 21:46:07,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-26 21:46:07,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-26 21:46:07,958 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-09-26 21:46:07,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:07,958 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-26 21:46:07,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-26 21:46:07,959 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-26 21:46:07,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-26 21:46:07,959 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:07,959 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-09-26 21:46:07,960 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:07,960 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:07,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-09-26 21:46:07,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:07,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:07,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:07,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:07,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:07,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:08,328 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:08,328 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:08,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:08,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:08,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:08,509 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:08,529 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:08,529 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-26 21:46:08,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:46:08,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:46:08,530 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:08,530 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-09-26 21:46:08,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:08,749 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-26 21:46:08,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:46:08,750 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-26 21:46:08,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:08,751 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:46:08,751 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:46:08,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:08,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:46:08,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-26 21:46:08,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-26 21:46:08,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-26 21:46:08,754 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-09-26 21:46:08,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:08,754 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-26 21:46:08,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:46:08,754 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-26 21:46:08,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-26 21:46:08,755 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:08,755 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-09-26 21:46:08,755 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:08,755 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:08,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-09-26 21:46:08,755 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:08,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:08,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:08,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:08,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:08,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:09,470 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:09,470 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:09,470 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:09,478 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:46:09,505 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:46:09,505 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:09,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:09,655 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:09,676 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:09,676 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-26 21:46:09,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:46:09,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:46:09,677 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:09,677 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-09-26 21:46:09,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:09,846 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-26 21:46:09,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:46:09,846 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-26 21:46:09,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:09,847 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:46:09,847 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:46:09,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:09,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:46:09,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-26 21:46:09,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-26 21:46:09,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-26 21:46:09,851 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-09-26 21:46:09,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:09,851 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-26 21:46:09,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:46:09,851 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-26 21:46:09,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-26 21:46:09,852 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:09,852 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-09-26 21:46:09,852 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:09,852 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:09,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-09-26 21:46:09,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:09,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:09,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:09,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:09,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:10,234 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:10,235 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:10,235 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:10,242 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:46:10,331 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-26 21:46:10,331 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:10,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:10,493 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:10,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:10,514 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-26 21:46:10,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:46:10,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:46:10,515 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:10,515 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-09-26 21:46:10,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:10,708 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-26 21:46:10,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:46:10,709 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-26 21:46:10,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:10,710 INFO L225 Difference]: With dead ends: 63 [2018-09-26 21:46:10,710 INFO L226 Difference]: Without dead ends: 61 [2018-09-26 21:46:10,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:10,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-26 21:46:10,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-26 21:46:10,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-26 21:46:10,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-26 21:46:10,713 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-09-26 21:46:10,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:10,714 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-26 21:46:10,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:46:10,714 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-26 21:46:10,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-26 21:46:10,715 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:10,715 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-09-26 21:46:10,715 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:10,715 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:10,715 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-09-26 21:46:10,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:10,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:10,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:10,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:10,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:10,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:10,927 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:10,927 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:10,935 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:46:10,976 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:46:10,977 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:10,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:11,121 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:11,121 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-26 21:46:11,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-26 21:46:11,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-26 21:46:11,122 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:11,122 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-09-26 21:46:11,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:11,368 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-26 21:46:11,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:46:11,369 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-26 21:46:11,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:11,369 INFO L225 Difference]: With dead ends: 65 [2018-09-26 21:46:11,369 INFO L226 Difference]: Without dead ends: 63 [2018-09-26 21:46:11,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:11,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-26 21:46:11,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-26 21:46:11,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-26 21:46:11,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-26 21:46:11,373 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-09-26 21:46:11,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:11,373 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-26 21:46:11,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-26 21:46:11,373 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-26 21:46:11,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-26 21:46:11,373 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:11,374 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-09-26 21:46:11,374 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:11,374 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:11,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-09-26 21:46:11,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:11,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:11,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:11,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:11,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:11,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:11,595 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:11,595 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:11,595 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:11,609 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:46:11,789 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-26 21:46:11,789 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:11,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:11,940 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:11,961 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:11,961 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-26 21:46:11,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:46:11,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:46:11,962 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:11,962 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-09-26 21:46:12,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:12,111 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-26 21:46:12,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:46:12,111 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-26 21:46:12,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:12,112 INFO L225 Difference]: With dead ends: 67 [2018-09-26 21:46:12,112 INFO L226 Difference]: Without dead ends: 65 [2018-09-26 21:46:12,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:12,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-26 21:46:12,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-26 21:46:12,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-26 21:46:12,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-26 21:46:12,115 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-09-26 21:46:12,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:12,115 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-26 21:46:12,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:46:12,115 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-26 21:46:12,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-26 21:46:12,115 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:12,115 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-09-26 21:46:12,116 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:12,116 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:12,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-09-26 21:46:12,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:12,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:12,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:12,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:12,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:12,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:12,317 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:12,317 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:12,317 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:12,327 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:46:12,430 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-26 21:46:12,430 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:12,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:12,603 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:12,624 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:12,624 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-26 21:46:12,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-26 21:46:12,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-26 21:46:12,625 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:12,625 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-09-26 21:46:12,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:12,752 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-26 21:46:12,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:46:12,752 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-26 21:46:12,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:12,753 INFO L225 Difference]: With dead ends: 69 [2018-09-26 21:46:12,753 INFO L226 Difference]: Without dead ends: 67 [2018-09-26 21:46:12,754 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:12,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-26 21:46:12,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-26 21:46:12,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-26 21:46:12,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-26 21:46:12,756 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-09-26 21:46:12,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:12,757 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-26 21:46:12,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-26 21:46:12,757 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-26 21:46:12,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-26 21:46:12,757 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:12,758 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-09-26 21:46:12,758 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:12,758 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:12,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-09-26 21:46:12,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:12,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:12,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:12,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:12,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:12,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:13,280 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:13,280 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:13,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:13,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:13,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:13,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:13,597 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:13,618 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:13,618 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-26 21:46:13,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:46:13,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:46:13,619 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:13,619 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-09-26 21:46:13,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:13,801 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-26 21:46:13,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:46:13,802 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-26 21:46:13,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:13,802 INFO L225 Difference]: With dead ends: 71 [2018-09-26 21:46:13,802 INFO L226 Difference]: Without dead ends: 69 [2018-09-26 21:46:13,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:13,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-26 21:46:13,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-26 21:46:13,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-26 21:46:13,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-26 21:46:13,805 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-09-26 21:46:13,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:13,805 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-26 21:46:13,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:46:13,806 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-26 21:46:13,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-26 21:46:13,806 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:13,806 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-09-26 21:46:13,806 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:13,806 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:13,806 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-09-26 21:46:13,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:13,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:13,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:13,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:13,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:13,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:14,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:14,029 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:14,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:14,036 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:46:14,071 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:46:14,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:14,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:14,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:14,224 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:14,225 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-26 21:46:14,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-26 21:46:14,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-26 21:46:14,225 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:14,225 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-09-26 21:46:14,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:14,444 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-26 21:46:14,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:46:14,444 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-26 21:46:14,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:14,445 INFO L225 Difference]: With dead ends: 73 [2018-09-26 21:46:14,445 INFO L226 Difference]: Without dead ends: 71 [2018-09-26 21:46:14,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:14,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-26 21:46:14,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-26 21:46:14,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-26 21:46:14,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-26 21:46:14,449 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-09-26 21:46:14,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:14,449 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-26 21:46:14,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-26 21:46:14,449 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-26 21:46:14,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-26 21:46:14,449 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:14,450 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-09-26 21:46:14,450 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:14,450 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:14,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-09-26 21:46:14,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:14,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:14,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:14,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:14,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:14,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:14,712 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:14,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:14,721 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:46:14,857 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-26 21:46:14,857 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:14,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:15,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:15,023 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:15,023 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-26 21:46:15,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:46:15,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:46:15,024 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:15,024 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-09-26 21:46:15,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:15,214 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-26 21:46:15,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:46:15,214 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-26 21:46:15,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:15,215 INFO L225 Difference]: With dead ends: 75 [2018-09-26 21:46:15,215 INFO L226 Difference]: Without dead ends: 73 [2018-09-26 21:46:15,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:15,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-26 21:46:15,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-26 21:46:15,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-26 21:46:15,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-26 21:46:15,218 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-09-26 21:46:15,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:15,218 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-26 21:46:15,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:46:15,219 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-26 21:46:15,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-26 21:46:15,219 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:15,219 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-09-26 21:46:15,220 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:15,220 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:15,220 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-09-26 21:46:15,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:15,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:15,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:15,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:15,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:15,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:15,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:15,679 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:15,680 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:15,688 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:46:15,724 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:46:15,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:15,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:15,906 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:15,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-26 21:46:15,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-26 21:46:15,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-26 21:46:15,907 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:15,907 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-09-26 21:46:16,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:16,181 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-26 21:46:16,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:46:16,181 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-26 21:46:16,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:16,182 INFO L225 Difference]: With dead ends: 77 [2018-09-26 21:46:16,182 INFO L226 Difference]: Without dead ends: 75 [2018-09-26 21:46:16,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:16,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-26 21:46:16,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-26 21:46:16,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-26 21:46:16,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-26 21:46:16,187 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-09-26 21:46:16,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:16,188 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-26 21:46:16,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-26 21:46:16,188 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-26 21:46:16,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-26 21:46:16,188 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:16,188 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-09-26 21:46:16,188 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:16,188 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:16,189 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-09-26 21:46:16,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:16,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:16,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:16,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:16,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:16,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:16,720 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:16,720 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:16,728 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:46:17,041 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-26 21:46:17,042 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:17,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:17,217 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:17,218 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-26 21:46:17,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:46:17,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:46:17,218 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:17,218 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-09-26 21:46:17,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:17,445 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-26 21:46:17,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:46:17,445 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-26 21:46:17,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:17,446 INFO L225 Difference]: With dead ends: 79 [2018-09-26 21:46:17,446 INFO L226 Difference]: Without dead ends: 77 [2018-09-26 21:46:17,447 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:17,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-26 21:46:17,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-26 21:46:17,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-26 21:46:17,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-26 21:46:17,450 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-09-26 21:46:17,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:17,450 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-26 21:46:17,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:46:17,450 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-26 21:46:17,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-26 21:46:17,450 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:17,450 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-09-26 21:46:17,451 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:17,451 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:17,451 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-09-26 21:46:17,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:17,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:17,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:17,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:17,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:17,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:17,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:17,689 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:17,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:17,696 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:46:17,849 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-26 21:46:17,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:17,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:18,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:18,972 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:18,972 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-26 21:46:18,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-26 21:46:18,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-26 21:46:18,973 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:18,973 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-09-26 21:46:19,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:19,217 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-26 21:46:19,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:46:19,218 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-26 21:46:19,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:19,218 INFO L225 Difference]: With dead ends: 81 [2018-09-26 21:46:19,218 INFO L226 Difference]: Without dead ends: 79 [2018-09-26 21:46:19,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:19,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-26 21:46:19,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-26 21:46:19,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-26 21:46:19,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-26 21:46:19,222 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-09-26 21:46:19,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:19,222 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-26 21:46:19,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-26 21:46:19,222 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-26 21:46:19,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-26 21:46:19,223 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:19,223 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-09-26 21:46:19,223 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:19,223 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:19,223 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-09-26 21:46:19,224 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:19,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:19,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:19,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:19,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:19,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:19,546 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:19,546 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:19,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:19,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:19,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:19,800 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:19,801 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-26 21:46:19,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:46:19,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:46:19,801 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:19,801 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-09-26 21:46:20,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:20,097 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-26 21:46:20,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-26 21:46:20,098 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-26 21:46:20,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:20,099 INFO L225 Difference]: With dead ends: 83 [2018-09-26 21:46:20,099 INFO L226 Difference]: Without dead ends: 81 [2018-09-26 21:46:20,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:20,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-26 21:46:20,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-26 21:46:20,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-26 21:46:20,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-26 21:46:20,102 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-09-26 21:46:20,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:20,102 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-26 21:46:20,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:46:20,102 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-26 21:46:20,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-26 21:46:20,103 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:20,103 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-09-26 21:46:20,103 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:20,103 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:20,103 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-09-26 21:46:20,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:20,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:20,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:20,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:20,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:20,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:20,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:20,422 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:20,422 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:20,431 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:46:20,486 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:46:20,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:20,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:20,747 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:20,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-26 21:46:20,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:46:20,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:46:20,748 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:20,748 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-09-26 21:46:21,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:21,015 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-26 21:46:21,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:46:21,016 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-26 21:46:21,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:21,016 INFO L225 Difference]: With dead ends: 85 [2018-09-26 21:46:21,016 INFO L226 Difference]: Without dead ends: 83 [2018-09-26 21:46:21,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:21,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-26 21:46:21,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-26 21:46:21,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-26 21:46:21,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-26 21:46:21,020 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-09-26 21:46:21,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:21,020 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-26 21:46:21,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:46:21,020 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-26 21:46:21,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-26 21:46:21,021 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:21,021 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-09-26 21:46:21,021 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:21,021 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:21,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-09-26 21:46:21,022 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:21,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:21,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:21,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:21,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:21,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:21,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:21,536 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:21,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:21,546 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:46:21,766 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-26 21:46:21,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:21,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:21,956 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:21,956 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-26 21:46:21,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:46:21,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:46:21,957 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:21,957 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-09-26 21:46:22,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:22,193 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-26 21:46:22,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:46:22,194 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-26 21:46:22,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:22,195 INFO L225 Difference]: With dead ends: 87 [2018-09-26 21:46:22,195 INFO L226 Difference]: Without dead ends: 85 [2018-09-26 21:46:22,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:22,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-26 21:46:22,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-26 21:46:22,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-26 21:46:22,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-26 21:46:22,199 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-09-26 21:46:22,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:22,199 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-26 21:46:22,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:46:22,199 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-26 21:46:22,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-26 21:46:22,200 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:22,200 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-09-26 21:46:22,200 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:22,200 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:22,200 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-09-26 21:46:22,200 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:22,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:22,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:22,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:22,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:22,826 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:22,826 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:22,834 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:46:22,875 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:46:22,875 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:22,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:23,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:23,067 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:23,068 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-26 21:46:23,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-26 21:46:23,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-26 21:46:23,069 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:23,069 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-09-26 21:46:23,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:23,667 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-26 21:46:23,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:46:23,667 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-09-26 21:46:23,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:23,668 INFO L225 Difference]: With dead ends: 89 [2018-09-26 21:46:23,668 INFO L226 Difference]: Without dead ends: 87 [2018-09-26 21:46:23,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:23,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-26 21:46:23,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-26 21:46:23,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-26 21:46:23,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-26 21:46:23,673 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-09-26 21:46:23,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:23,674 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-26 21:46:23,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-26 21:46:23,674 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-26 21:46:23,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-26 21:46:23,674 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:23,675 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-09-26 21:46:23,675 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:23,675 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:23,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-09-26 21:46:23,675 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:23,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:23,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:23,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:23,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:23,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:23,990 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:23,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:23,998 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:46:24,531 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-26 21:46:24,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:24,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:24,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:24,802 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:24,802 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-26 21:46:24,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:46:24,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:46:24,803 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:24,803 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-09-26 21:46:25,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:25,105 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-26 21:46:25,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-26 21:46:25,105 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-26 21:46:25,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:25,106 INFO L225 Difference]: With dead ends: 91 [2018-09-26 21:46:25,106 INFO L226 Difference]: Without dead ends: 89 [2018-09-26 21:46:25,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:25,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-26 21:46:25,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-26 21:46:25,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-26 21:46:25,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-26 21:46:25,109 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-09-26 21:46:25,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:25,109 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-26 21:46:25,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:46:25,109 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-26 21:46:25,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-26 21:46:25,110 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:25,110 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-09-26 21:46:25,110 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:25,110 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:25,111 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-09-26 21:46:25,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:25,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:25,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:25,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:25,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:25,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:25,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:25,504 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:25,504 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:25,512 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:46:25,728 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-26 21:46:25,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:25,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:25,957 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:25,957 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-26 21:46:25,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-26 21:46:25,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-26 21:46:25,958 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:25,958 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-09-26 21:46:26,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:26,157 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-26 21:46:26,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-26 21:46:26,158 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-09-26 21:46:26,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:26,158 INFO L225 Difference]: With dead ends: 93 [2018-09-26 21:46:26,158 INFO L226 Difference]: Without dead ends: 91 [2018-09-26 21:46:26,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:26,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-26 21:46:26,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-26 21:46:26,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-26 21:46:26,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-26 21:46:26,162 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-09-26 21:46:26,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:26,162 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-26 21:46:26,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-26 21:46:26,163 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-26 21:46:26,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-26 21:46:26,163 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:26,163 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-09-26 21:46:26,163 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:26,164 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:26,164 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-09-26 21:46:26,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:26,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:26,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:26,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:26,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:26,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:26,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:26,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:26,612 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:26,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:26,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:26,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:26,882 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-26 21:46:26,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-26 21:46:26,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-26 21:46:26,882 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:26,882 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-09-26 21:46:27,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:27,176 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-26 21:46:27,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-26 21:46:27,176 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-26 21:46:27,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:27,176 INFO L225 Difference]: With dead ends: 95 [2018-09-26 21:46:27,177 INFO L226 Difference]: Without dead ends: 93 [2018-09-26 21:46:27,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:27,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-26 21:46:27,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-26 21:46:27,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-26 21:46:27,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-26 21:46:27,179 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-09-26 21:46:27,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:27,180 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-26 21:46:27,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-26 21:46:27,180 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-26 21:46:27,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-26 21:46:27,180 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:27,181 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-09-26 21:46:27,181 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:27,181 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:27,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-09-26 21:46:27,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:27,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:27,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:27,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:27,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:27,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:27,500 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:27,500 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:27,508 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:46:27,552 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:46:27,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:27,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:27,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:27,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:27,928 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-26 21:46:27,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-26 21:46:27,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-26 21:46:27,930 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:27,930 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-09-26 21:46:28,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:28,417 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-26 21:46:28,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:46:28,417 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-09-26 21:46:28,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:28,418 INFO L225 Difference]: With dead ends: 97 [2018-09-26 21:46:28,418 INFO L226 Difference]: Without dead ends: 95 [2018-09-26 21:46:28,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:28,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-26 21:46:28,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-26 21:46:28,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-26 21:46:28,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-26 21:46:28,422 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-09-26 21:46:28,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:28,422 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-26 21:46:28,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-26 21:46:28,422 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-26 21:46:28,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-26 21:46:28,423 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:28,423 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-09-26 21:46:28,423 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:28,423 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:28,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-09-26 21:46:28,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:28,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:28,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:28,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:28,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:29,268 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:29,268 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:29,277 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:46:29,586 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-26 21:46:29,587 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:29,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:29,837 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:29,838 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-26 21:46:29,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:46:29,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:46:29,838 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:29,839 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-09-26 21:46:30,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:30,107 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-26 21:46:30,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-26 21:46:30,108 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-26 21:46:30,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:30,108 INFO L225 Difference]: With dead ends: 99 [2018-09-26 21:46:30,109 INFO L226 Difference]: Without dead ends: 97 [2018-09-26 21:46:30,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:30,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-26 21:46:30,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-26 21:46:30,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-26 21:46:30,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-26 21:46:30,112 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-09-26 21:46:30,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:30,112 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-26 21:46:30,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:46:30,112 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-26 21:46:30,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-26 21:46:30,113 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:30,113 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-09-26 21:46:30,113 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:30,113 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:30,113 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-09-26 21:46:30,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:30,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:30,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:30,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:30,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:30,818 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:30,818 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:30,826 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:46:30,872 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:46:30,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:30,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:31,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:31,112 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:31,113 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-26 21:46:31,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-26 21:46:31,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-26 21:46:31,113 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:31,114 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-09-26 21:46:31,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:31,458 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-26 21:46:31,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:46:31,458 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-09-26 21:46:31,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:31,459 INFO L225 Difference]: With dead ends: 101 [2018-09-26 21:46:31,459 INFO L226 Difference]: Without dead ends: 99 [2018-09-26 21:46:31,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:31,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-26 21:46:31,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-26 21:46:31,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-26 21:46:31,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-26 21:46:31,462 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-09-26 21:46:31,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:31,462 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-26 21:46:31,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-26 21:46:31,462 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-26 21:46:31,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-26 21:46:31,463 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:31,463 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-09-26 21:46:31,463 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:31,463 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:31,463 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-09-26 21:46:31,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:31,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:31,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:31,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:31,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:31,777 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:31,777 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:31,785 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:46:32,643 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-26 21:46:32,644 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:32,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:32,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:32,910 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:32,910 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-26 21:46:32,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:46:32,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:46:32,911 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:32,911 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-09-26 21:46:33,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:33,177 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-26 21:46:33,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:46:33,177 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-26 21:46:33,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:33,178 INFO L225 Difference]: With dead ends: 103 [2018-09-26 21:46:33,178 INFO L226 Difference]: Without dead ends: 101 [2018-09-26 21:46:33,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:33,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-26 21:46:33,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-26 21:46:33,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-26 21:46:33,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-26 21:46:33,181 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-09-26 21:46:33,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:33,181 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-26 21:46:33,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:46:33,181 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-26 21:46:33,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-26 21:46:33,182 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:33,182 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-09-26 21:46:33,183 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:33,183 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:33,183 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-09-26 21:46:33,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:33,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:33,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:33,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:33,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:33,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:33,751 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:33,751 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:33,757 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:46:34,069 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-26 21:46:34,070 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:34,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:34,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:34,362 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:34,362 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-26 21:46:34,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-26 21:46:34,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-26 21:46:34,363 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:34,363 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-09-26 21:46:34,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:34,649 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-26 21:46:34,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:46:34,649 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-09-26 21:46:34,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:34,650 INFO L225 Difference]: With dead ends: 105 [2018-09-26 21:46:34,650 INFO L226 Difference]: Without dead ends: 103 [2018-09-26 21:46:34,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:34,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-26 21:46:34,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-26 21:46:34,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-26 21:46:34,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-26 21:46:34,653 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-09-26 21:46:34,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:34,653 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-26 21:46:34,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-26 21:46:34,653 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-26 21:46:34,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-26 21:46:34,654 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:34,654 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-09-26 21:46:34,654 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:34,654 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:34,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-09-26 21:46:34,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:34,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:34,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:34,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:34,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:34,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:35,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:35,009 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:35,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:35,016 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:35,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:35,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:36,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:36,678 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:36,678 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-26 21:46:36,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-26 21:46:36,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-26 21:46:36,679 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:36,679 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-09-26 21:46:37,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:37,009 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-26 21:46:37,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-26 21:46:37,009 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-26 21:46:37,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:37,010 INFO L225 Difference]: With dead ends: 107 [2018-09-26 21:46:37,010 INFO L226 Difference]: Without dead ends: 105 [2018-09-26 21:46:37,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:37,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-26 21:46:37,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-26 21:46:37,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-26 21:46:37,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-26 21:46:37,014 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-09-26 21:46:37,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:37,014 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-26 21:46:37,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-26 21:46:37,014 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-26 21:46:37,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-26 21:46:37,015 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:37,015 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-09-26 21:46:37,015 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:37,016 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:37,016 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-09-26 21:46:37,016 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:37,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:37,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:37,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:37,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:37,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:37,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:37,409 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:37,409 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:37,417 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:46:37,465 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:46:37,465 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:37,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:37,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:37,797 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:37,797 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-26 21:46:37,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-26 21:46:37,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-26 21:46:37,799 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:37,799 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-09-26 21:46:38,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:38,272 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-26 21:46:38,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:46:38,272 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-09-26 21:46:38,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:38,273 INFO L225 Difference]: With dead ends: 109 [2018-09-26 21:46:38,273 INFO L226 Difference]: Without dead ends: 107 [2018-09-26 21:46:38,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:38,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-26 21:46:38,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-26 21:46:38,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-26 21:46:38,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-26 21:46:38,276 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-09-26 21:46:38,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:38,277 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-26 21:46:38,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-26 21:46:38,277 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-26 21:46:38,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-26 21:46:38,277 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:38,278 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-09-26 21:46:38,278 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:38,278 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:38,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-09-26 21:46:38,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:38,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:38,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:38,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:38,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:38,778 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:38,778 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:38,786 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:46:39,229 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-26 21:46:39,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:39,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:39,687 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:39,687 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-26 21:46:39,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-26 21:46:39,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-26 21:46:39,688 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:39,689 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-09-26 21:46:40,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:40,065 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-26 21:46:40,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-26 21:46:40,066 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-26 21:46:40,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:40,067 INFO L225 Difference]: With dead ends: 111 [2018-09-26 21:46:40,067 INFO L226 Difference]: Without dead ends: 109 [2018-09-26 21:46:40,067 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:40,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-26 21:46:40,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-26 21:46:40,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-26 21:46:40,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-26 21:46:40,070 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-09-26 21:46:40,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:40,070 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-26 21:46:40,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-26 21:46:40,071 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-26 21:46:40,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-26 21:46:40,071 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:40,071 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-09-26 21:46:40,072 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:40,072 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:40,072 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-09-26 21:46:40,072 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:40,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:40,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:40,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:40,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:40,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:40,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:40,887 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:40,887 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:40,902 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:46:40,971 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:46:40,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:40,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:41,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:41,262 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:41,263 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-26 21:46:41,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-26 21:46:41,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-26 21:46:41,264 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:41,264 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-09-26 21:46:41,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:41,634 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-26 21:46:41,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:46:41,634 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-09-26 21:46:41,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:41,635 INFO L225 Difference]: With dead ends: 113 [2018-09-26 21:46:41,635 INFO L226 Difference]: Without dead ends: 111 [2018-09-26 21:46:41,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:41,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-26 21:46:41,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-26 21:46:41,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-26 21:46:41,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-26 21:46:41,638 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-09-26 21:46:41,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:41,638 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-26 21:46:41,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-26 21:46:41,638 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-26 21:46:41,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-26 21:46:41,639 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:41,639 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-09-26 21:46:41,639 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:41,639 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:41,639 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-09-26 21:46:41,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:41,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:41,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:41,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:41,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:42,432 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:42,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:42,450 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:46:43,857 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-26 21:46:43,857 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:43,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:44,288 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:44,288 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-26 21:46:44,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-26 21:46:44,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-26 21:46:44,289 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:44,289 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-09-26 21:46:44,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:44,559 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-26 21:46:44,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-26 21:46:44,559 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-26 21:46:44,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:44,560 INFO L225 Difference]: With dead ends: 115 [2018-09-26 21:46:44,560 INFO L226 Difference]: Without dead ends: 113 [2018-09-26 21:46:44,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:44,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-26 21:46:44,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-26 21:46:44,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-26 21:46:44,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-26 21:46:44,563 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-09-26 21:46:44,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:44,563 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-26 21:46:44,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-26 21:46:44,564 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-26 21:46:44,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-26 21:46:44,564 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:44,564 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-09-26 21:46:44,565 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:44,565 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:44,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-09-26 21:46:44,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:44,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:44,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:44,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:44,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:44,955 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:44,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:44,963 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:46:45,390 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-26 21:46:45,390 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:45,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:45,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:45,762 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:45,762 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-26 21:46:45,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-26 21:46:45,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-26 21:46:45,763 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:45,763 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-09-26 21:46:46,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:46,672 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-26 21:46:46,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-26 21:46:46,672 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-09-26 21:46:46,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:46,673 INFO L225 Difference]: With dead ends: 117 [2018-09-26 21:46:46,673 INFO L226 Difference]: Without dead ends: 115 [2018-09-26 21:46:46,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:46,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-26 21:46:46,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-26 21:46:46,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-26 21:46:46,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-26 21:46:46,676 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-09-26 21:46:46,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:46,677 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-26 21:46:46,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-26 21:46:46,677 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-26 21:46:46,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-26 21:46:46,678 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:46,678 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-09-26 21:46:46,678 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:46,678 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:46,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-09-26 21:46:46,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:46,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:46,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:46,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:46,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:46,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:47,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:47,124 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:47,124 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:47,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:47,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:47,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:47,486 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:47,486 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-26 21:46:47,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-26 21:46:47,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-26 21:46:47,487 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:47,487 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-09-26 21:46:48,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:48,053 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-26 21:46:48,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-26 21:46:48,053 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-26 21:46:48,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:48,054 INFO L225 Difference]: With dead ends: 119 [2018-09-26 21:46:48,054 INFO L226 Difference]: Without dead ends: 117 [2018-09-26 21:46:48,054 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:48,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-26 21:46:48,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-26 21:46:48,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-26 21:46:48,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-26 21:46:48,057 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-09-26 21:46:48,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:48,057 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-26 21:46:48,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-26 21:46:48,057 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-26 21:46:48,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-26 21:46:48,058 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:48,058 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-09-26 21:46:48,058 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:48,059 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:48,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-09-26 21:46:48,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:48,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:48,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:48,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:48,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:48,561 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:48,561 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:48,568 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:46:48,622 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:46:48,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:48,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:49,787 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:49,787 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-26 21:46:49,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-26 21:46:49,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-26 21:46:49,788 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:49,788 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-09-26 21:46:50,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:50,235 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-26 21:46:50,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-26 21:46:50,235 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-09-26 21:46:50,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:50,236 INFO L225 Difference]: With dead ends: 121 [2018-09-26 21:46:50,236 INFO L226 Difference]: Without dead ends: 119 [2018-09-26 21:46:50,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:50,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-26 21:46:50,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-26 21:46:50,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-26 21:46:50,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-26 21:46:50,239 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-09-26 21:46:50,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:50,240 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-26 21:46:50,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-26 21:46:50,240 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-26 21:46:50,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-26 21:46:50,241 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:50,241 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-09-26 21:46:50,241 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:50,241 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:50,241 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-09-26 21:46:50,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:50,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:50,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:50,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:50,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:50,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:50,954 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:50,954 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:50,961 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:46:51,576 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-26 21:46:51,576 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:51,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:51,938 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:51,938 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-26 21:46:51,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-26 21:46:51,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-26 21:46:51,939 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:51,940 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-09-26 21:46:52,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:52,238 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-26 21:46:52,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-26 21:46:52,238 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-09-26 21:46:52,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:52,239 INFO L225 Difference]: With dead ends: 123 [2018-09-26 21:46:52,239 INFO L226 Difference]: Without dead ends: 121 [2018-09-26 21:46:52,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:52,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-26 21:46:52,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-26 21:46:52,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-26 21:46:52,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-09-26 21:46:52,242 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-09-26 21:46:52,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:52,242 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-09-26 21:46:52,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-26 21:46:52,242 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-09-26 21:46:52,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-26 21:46:52,243 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:52,243 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-09-26 21:46:52,243 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:52,243 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:52,243 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-09-26 21:46:52,243 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:52,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:52,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:52,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:52,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:52,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:52,622 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:52,622 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:52,631 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:46:52,690 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:46:52,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:52,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:52,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:53,013 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:53,013 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-26 21:46:53,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-26 21:46:53,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-26 21:46:53,014 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:53,015 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-09-26 21:46:53,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:53,458 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-26 21:46:53,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-26 21:46:53,458 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-09-26 21:46:53,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:53,459 INFO L225 Difference]: With dead ends: 125 [2018-09-26 21:46:53,459 INFO L226 Difference]: Without dead ends: 123 [2018-09-26 21:46:53,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:53,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-26 21:46:53,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-26 21:46:53,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-26 21:46:53,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-26 21:46:53,462 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-09-26 21:46:53,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:53,463 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-26 21:46:53,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-26 21:46:53,463 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-26 21:46:53,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-26 21:46:53,463 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:53,464 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-09-26 21:46:53,464 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:53,464 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:53,464 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-09-26 21:46:53,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:53,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:53,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:53,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:53,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:54,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:54,052 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:54,052 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:54,060 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:46:56,069 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-26 21:46:56,069 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:56,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:56,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:56,533 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:56,534 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-26 21:46:56,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-26 21:46:56,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-26 21:46:56,535 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:56,535 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-09-26 21:46:57,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:57,006 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-26 21:46:57,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-26 21:46:57,006 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-09-26 21:46:57,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:57,007 INFO L225 Difference]: With dead ends: 127 [2018-09-26 21:46:57,007 INFO L226 Difference]: Without dead ends: 125 [2018-09-26 21:46:57,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:57,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-26 21:46:57,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-26 21:46:57,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-26 21:46:57,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-09-26 21:46:57,010 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-09-26 21:46:57,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:57,010 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-09-26 21:46:57,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-26 21:46:57,010 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-09-26 21:46:57,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-26 21:46:57,011 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:57,011 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-09-26 21:46:57,011 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:57,011 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:57,012 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-09-26 21:46:57,012 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:57,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:57,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:57,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:57,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:57,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:57,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:57,483 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:57,483 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:57,490 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:46:58,108 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-26 21:46:58,109 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:58,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:58,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:58,409 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:58,409 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-26 21:46:58,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-26 21:46:58,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-26 21:46:58,410 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:58,410 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-09-26 21:46:58,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:58,943 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-26 21:46:58,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-26 21:46:58,943 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-09-26 21:46:58,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:58,944 INFO L225 Difference]: With dead ends: 129 [2018-09-26 21:46:58,944 INFO L226 Difference]: Without dead ends: 127 [2018-09-26 21:46:58,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:58,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-26 21:46:58,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-26 21:46:58,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-26 21:46:58,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-26 21:46:58,946 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-09-26 21:46:58,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:58,947 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-26 21:46:58,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-26 21:46:58,947 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-26 21:46:58,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-26 21:46:58,947 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:58,947 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-09-26 21:46:58,948 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:58,948 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:58,948 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-09-26 21:46:58,948 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:58,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:58,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:58,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:58,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:59,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:59,487 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:59,487 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:59,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:59,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:59,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:59,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:59,892 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:59,892 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-26 21:46:59,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-26 21:46:59,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-26 21:46:59,893 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:59,893 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-09-26 21:47:00,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:00,333 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-26 21:47:00,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-26 21:47:00,333 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-09-26 21:47:00,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:00,334 INFO L225 Difference]: With dead ends: 131 [2018-09-26 21:47:00,334 INFO L226 Difference]: Without dead ends: 129 [2018-09-26 21:47:00,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:00,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-26 21:47:00,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-26 21:47:00,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-26 21:47:00,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-09-26 21:47:00,337 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-09-26 21:47:00,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:00,337 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-09-26 21:47:00,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-26 21:47:00,337 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-09-26 21:47:00,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-26 21:47:00,338 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:00,338 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-09-26 21:47:00,338 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:00,338 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:00,338 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-09-26 21:47:00,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:00,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:00,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:00,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:47:00,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:00,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:00,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:00,762 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:00,762 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:00,770 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:47:00,830 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:47:00,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:00,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:01,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:01,148 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:01,148 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-26 21:47:01,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-26 21:47:01,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-26 21:47:01,149 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:01,149 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-09-26 21:47:01,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:01,570 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-26 21:47:01,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-26 21:47:01,570 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-09-26 21:47:01,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:01,571 INFO L225 Difference]: With dead ends: 133 [2018-09-26 21:47:01,571 INFO L226 Difference]: Without dead ends: 131 [2018-09-26 21:47:01,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:01,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-26 21:47:01,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-26 21:47:01,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-26 21:47:01,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-26 21:47:01,574 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-09-26 21:47:01,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:01,575 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-26 21:47:01,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-26 21:47:01,575 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-26 21:47:01,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-26 21:47:01,575 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:01,575 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-09-26 21:47:01,575 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:01,576 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:01,576 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-09-26 21:47:01,576 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:01,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:01,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:01,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:01,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:02,061 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:02,061 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:02,071 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:47:02,908 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-26 21:47:02,908 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:02,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:03,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:03,253 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:03,254 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-26 21:47:03,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-26 21:47:03,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-26 21:47:03,255 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:03,255 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-09-26 21:47:03,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:03,700 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-26 21:47:03,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-26 21:47:03,700 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-09-26 21:47:03,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:03,701 INFO L225 Difference]: With dead ends: 135 [2018-09-26 21:47:03,701 INFO L226 Difference]: Without dead ends: 133 [2018-09-26 21:47:03,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:03,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-26 21:47:03,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-26 21:47:03,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-26 21:47:03,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-09-26 21:47:03,704 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-09-26 21:47:03,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:03,705 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-09-26 21:47:03,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-26 21:47:03,705 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-09-26 21:47:03,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-26 21:47:03,706 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:03,706 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-09-26 21:47:03,706 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:03,706 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:03,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-09-26 21:47:03,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:03,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:03,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:03,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:03,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:04,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:04,142 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:04,142 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:04,150 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:47:04,228 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:47:04,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:04,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:04,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:04,671 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:04,671 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-26 21:47:04,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-26 21:47:04,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-26 21:47:04,673 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:04,673 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-09-26 21:47:05,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:05,241 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-26 21:47:05,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-26 21:47:05,242 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-09-26 21:47:05,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:05,242 INFO L225 Difference]: With dead ends: 137 [2018-09-26 21:47:05,242 INFO L226 Difference]: Without dead ends: 135 [2018-09-26 21:47:05,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:05,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-26 21:47:05,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-26 21:47:05,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-26 21:47:05,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-26 21:47:05,246 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-09-26 21:47:05,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:05,246 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-26 21:47:05,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-26 21:47:05,246 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-26 21:47:05,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-26 21:47:05,247 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:05,247 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-09-26 21:47:05,247 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:05,247 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:05,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-09-26 21:47:05,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:05,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:05,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:05,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:05,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:05,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:05,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:05,696 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:05,696 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:05,703 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:47:08,486 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-26 21:47:08,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:08,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:08,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:08,860 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:08,860 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-26 21:47:08,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-26 21:47:08,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-26 21:47:08,861 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:08,861 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-09-26 21:47:09,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:09,460 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-26 21:47:09,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-26 21:47:09,460 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-09-26 21:47:09,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:09,461 INFO L225 Difference]: With dead ends: 139 [2018-09-26 21:47:09,461 INFO L226 Difference]: Without dead ends: 137 [2018-09-26 21:47:09,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:09,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-26 21:47:09,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-26 21:47:09,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-26 21:47:09,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-09-26 21:47:09,464 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-09-26 21:47:09,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:09,465 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-09-26 21:47:09,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-26 21:47:09,465 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-09-26 21:47:09,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-26 21:47:09,466 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:09,466 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-09-26 21:47:09,466 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:09,466 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:09,466 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-09-26 21:47:09,466 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:09,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:09,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:09,467 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:09,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:09,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:10,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:10,082 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:10,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:10,090 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:47:10,905 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-26 21:47:10,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:10,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:11,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:11,297 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:11,298 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-26 21:47:11,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-26 21:47:11,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-26 21:47:11,299 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:11,299 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-09-26 21:47:11,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:11,809 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-26 21:47:11,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-26 21:47:11,810 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-09-26 21:47:11,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:11,810 INFO L225 Difference]: With dead ends: 141 [2018-09-26 21:47:11,810 INFO L226 Difference]: Without dead ends: 139 [2018-09-26 21:47:11,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:11,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-26 21:47:11,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-26 21:47:11,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-26 21:47:11,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-26 21:47:11,813 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-09-26 21:47:11,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:11,813 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-26 21:47:11,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-26 21:47:11,814 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-26 21:47:11,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-26 21:47:11,814 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:11,815 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-09-26 21:47:11,815 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:11,815 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:11,815 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-09-26 21:47:11,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:11,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:11,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:11,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:11,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:12,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:12,271 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:12,271 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:12,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:47:12,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:12,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:12,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:12,711 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:12,711 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-26 21:47:12,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-26 21:47:12,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-26 21:47:12,712 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:12,712 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-09-26 21:47:13,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:13,306 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-26 21:47:13,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-26 21:47:13,307 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-09-26 21:47:13,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:13,307 INFO L225 Difference]: With dead ends: 143 [2018-09-26 21:47:13,307 INFO L226 Difference]: Without dead ends: 141 [2018-09-26 21:47:13,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:13,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-26 21:47:13,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-26 21:47:13,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-26 21:47:13,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-09-26 21:47:13,310 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-09-26 21:47:13,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:13,310 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-09-26 21:47:13,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-26 21:47:13,310 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-09-26 21:47:13,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-26 21:47:13,311 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:13,311 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-09-26 21:47:13,311 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:13,311 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:13,311 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-09-26 21:47:13,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:13,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:13,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:13,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:47:13,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:13,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:13,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:13,928 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:13,928 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:13,935 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:47:14,005 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:47:14,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:14,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:14,382 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:14,382 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-26 21:47:14,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-26 21:47:14,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-26 21:47:14,383 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:14,383 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-09-26 21:47:15,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:15,095 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-26 21:47:15,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-26 21:47:15,095 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-09-26 21:47:15,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:15,096 INFO L225 Difference]: With dead ends: 145 [2018-09-26 21:47:15,096 INFO L226 Difference]: Without dead ends: 143 [2018-09-26 21:47:15,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:15,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-26 21:47:15,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-26 21:47:15,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-26 21:47:15,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-26 21:47:15,101 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-09-26 21:47:15,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:15,102 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-26 21:47:15,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-26 21:47:15,102 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-26 21:47:15,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-26 21:47:15,102 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:15,103 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-09-26 21:47:15,103 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:15,103 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:15,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-09-26 21:47:15,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:15,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:15,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:15,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:15,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:15,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:15,566 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:15,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:15,573 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:47:16,736 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-26 21:47:16,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:16,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:17,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:17,345 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:17,346 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-26 21:47:17,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-26 21:47:17,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-26 21:47:17,347 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:17,347 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-09-26 21:47:18,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:18,015 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-26 21:47:18,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-26 21:47:18,015 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-09-26 21:47:18,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:18,016 INFO L225 Difference]: With dead ends: 147 [2018-09-26 21:47:18,016 INFO L226 Difference]: Without dead ends: 145 [2018-09-26 21:47:18,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:18,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-26 21:47:18,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-26 21:47:18,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-26 21:47:18,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-09-26 21:47:18,019 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-09-26 21:47:18,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:18,019 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-09-26 21:47:18,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-26 21:47:18,019 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-09-26 21:47:18,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-26 21:47:18,020 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:18,020 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-09-26 21:47:18,020 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:18,020 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:18,020 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-09-26 21:47:18,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:18,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:18,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:18,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:18,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:18,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:18,708 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:18,708 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:18,715 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:47:18,783 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:47:18,783 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:18,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:19,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:19,150 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:19,150 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-26 21:47:19,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-26 21:47:19,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-26 21:47:19,152 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:19,152 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-09-26 21:47:19,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:19,982 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-26 21:47:19,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-26 21:47:19,983 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-09-26 21:47:19,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:19,984 INFO L225 Difference]: With dead ends: 149 [2018-09-26 21:47:19,984 INFO L226 Difference]: Without dead ends: 147 [2018-09-26 21:47:19,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:19,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-26 21:47:19,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-26 21:47:19,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-26 21:47:19,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-26 21:47:19,987 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-09-26 21:47:19,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:19,987 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-26 21:47:19,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-26 21:47:19,988 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-26 21:47:19,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-26 21:47:19,988 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:19,988 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-09-26 21:47:19,988 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:19,989 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:19,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-09-26 21:47:19,989 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:19,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:19,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:19,990 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:19,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:20,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:20,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:20,502 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:20,502 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:20,509 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:47:24,587 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-26 21:47:24,587 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:24,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:25,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:25,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:25,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-26 21:47:25,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-26 21:47:25,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-26 21:47:25,067 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:25,068 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-09-26 21:47:25,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:25,784 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-26 21:47:25,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-26 21:47:25,784 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-09-26 21:47:25,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:25,785 INFO L225 Difference]: With dead ends: 151 [2018-09-26 21:47:25,785 INFO L226 Difference]: Without dead ends: 149 [2018-09-26 21:47:25,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:25,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-26 21:47:25,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-26 21:47:25,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-26 21:47:25,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-09-26 21:47:25,789 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-09-26 21:47:25,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:25,789 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-09-26 21:47:25,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-26 21:47:25,789 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-09-26 21:47:25,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-26 21:47:25,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:25,790 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-09-26 21:47:25,790 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:25,790 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:25,791 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-09-26 21:47:25,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:25,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:25,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:25,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:25,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:26,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:26,328 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:26,329 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:26,338 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:47:27,419 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-26 21:47:27,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:27,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:27,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:27,861 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:27,862 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-26 21:47:27,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-26 21:47:27,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-26 21:47:27,863 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:27,863 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-09-26 21:47:28,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:28,378 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-26 21:47:28,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-26 21:47:28,378 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-09-26 21:47:28,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:28,379 INFO L225 Difference]: With dead ends: 153 [2018-09-26 21:47:28,379 INFO L226 Difference]: Without dead ends: 151 [2018-09-26 21:47:28,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:28,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-26 21:47:28,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-26 21:47:28,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-26 21:47:28,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-26 21:47:28,383 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-09-26 21:47:28,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:28,383 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-26 21:47:28,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-26 21:47:28,383 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-26 21:47:28,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-26 21:47:28,384 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:28,384 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-09-26 21:47:28,384 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:28,384 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:28,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-09-26 21:47:28,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:28,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:28,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:28,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:28,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:28,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:28,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:28,953 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:28,954 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:28,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:47:29,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:29,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:29,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:29,434 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:29,434 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-26 21:47:29,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-26 21:47:29,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-26 21:47:29,435 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:29,436 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-09-26 21:47:30,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:30,310 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-26 21:47:30,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-26 21:47:30,311 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-09-26 21:47:30,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:30,311 INFO L225 Difference]: With dead ends: 155 [2018-09-26 21:47:30,311 INFO L226 Difference]: Without dead ends: 153 [2018-09-26 21:47:30,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:30,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-26 21:47:30,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-26 21:47:30,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-26 21:47:30,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-09-26 21:47:30,314 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-09-26 21:47:30,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:30,314 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-09-26 21:47:30,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-26 21:47:30,314 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-09-26 21:47:30,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-26 21:47:30,315 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:30,315 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-09-26 21:47:30,315 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:30,315 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:30,315 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-09-26 21:47:30,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:30,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:30,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:30,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:47:30,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:30,920 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:30,920 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:30,927 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:47:30,999 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:47:30,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:31,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:31,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:31,432 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:31,433 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-26 21:47:31,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-26 21:47:31,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-26 21:47:31,434 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:31,434 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2018-09-26 21:47:31,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:31,993 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-26 21:47:31,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-26 21:47:31,994 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-09-26 21:47:31,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:31,994 INFO L225 Difference]: With dead ends: 157 [2018-09-26 21:47:31,994 INFO L226 Difference]: Without dead ends: 155 [2018-09-26 21:47:31,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:31,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-26 21:47:31,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-26 21:47:31,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-26 21:47:31,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-09-26 21:47:31,997 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2018-09-26 21:47:31,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:31,997 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-09-26 21:47:31,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-26 21:47:31,998 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-09-26 21:47:31,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-26 21:47:31,998 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:31,998 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-09-26 21:47:31,998 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:31,998 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:31,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 75 times [2018-09-26 21:47:31,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:31,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:31,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:31,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:31,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:32,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:32,546 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:32,546 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:32,554 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:47:34,120 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-26 21:47:34,120 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:34,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:34,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:34,522 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:34,522 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-26 21:47:34,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-26 21:47:34,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-26 21:47:34,523 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:34,524 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2018-09-26 21:47:35,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:35,104 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-26 21:47:35,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-26 21:47:35,104 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-09-26 21:47:35,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:35,105 INFO L225 Difference]: With dead ends: 159 [2018-09-26 21:47:35,105 INFO L226 Difference]: Without dead ends: 157 [2018-09-26 21:47:35,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:35,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-26 21:47:35,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-26 21:47:35,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-26 21:47:35,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-09-26 21:47:35,107 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2018-09-26 21:47:35,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:35,108 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-09-26 21:47:35,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-26 21:47:35,108 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-09-26 21:47:35,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-26 21:47:35,108 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:35,109 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1] [2018-09-26 21:47:35,109 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:35,109 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:35,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1961675265, now seen corresponding path program 76 times [2018-09-26 21:47:35,109 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:35,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:35,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:35,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:35,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:35,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:35,835 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:35,835 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:35,843 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:47:35,916 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:47:35,916 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:35,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:36,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:36,322 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:36,323 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-26 21:47:36,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-26 21:47:36,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-26 21:47:36,324 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:36,324 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2018-09-26 21:47:37,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:37,611 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-26 21:47:37,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-26 21:47:37,611 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-09-26 21:47:37,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:37,612 INFO L225 Difference]: With dead ends: 161 [2018-09-26 21:47:37,612 INFO L226 Difference]: Without dead ends: 159 [2018-09-26 21:47:37,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:37,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-26 21:47:37,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-26 21:47:37,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-26 21:47:37,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-09-26 21:47:37,616 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2018-09-26 21:47:37,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:37,616 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-09-26 21:47:37,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-26 21:47:37,617 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-09-26 21:47:37,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-26 21:47:37,617 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:37,618 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-09-26 21:47:37,618 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:37,618 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:37,618 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 77 times [2018-09-26 21:47:37,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:37,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:37,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:37,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:37,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:37,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:38,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:38,199 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:38,199 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:38,206 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:47:43,879 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-26 21:47:43,879 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:43,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:44,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:44,293 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:44,293 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-26 21:47:44,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-26 21:47:44,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-26 21:47:44,295 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:44,295 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2018-09-26 21:47:45,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:45,111 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-26 21:47:45,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-26 21:47:45,111 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-09-26 21:47:45,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:45,112 INFO L225 Difference]: With dead ends: 163 [2018-09-26 21:47:45,112 INFO L226 Difference]: Without dead ends: 161 [2018-09-26 21:47:45,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:45,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-26 21:47:45,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-26 21:47:45,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-26 21:47:45,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-09-26 21:47:45,116 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2018-09-26 21:47:45,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:45,116 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-09-26 21:47:45,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-26 21:47:45,116 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-09-26 21:47:45,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-26 21:47:45,117 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:45,117 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1] [2018-09-26 21:47:45,118 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:45,118 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:45,118 INFO L82 PathProgramCache]: Analyzing trace with hash -982073613, now seen corresponding path program 78 times [2018-09-26 21:47:45,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:45,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:45,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:45,119 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:45,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:45,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:45,855 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:45,855 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:45,863 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:47:47,263 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-26 21:47:47,263 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:47,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:47,712 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:47,713 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-26 21:47:47,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-26 21:47:47,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-26 21:47:47,714 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:47,714 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2018-09-26 21:47:48,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:48,305 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-26 21:47:48,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-26 21:47:48,306 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-09-26 21:47:48,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:48,306 INFO L225 Difference]: With dead ends: 165 [2018-09-26 21:47:48,307 INFO L226 Difference]: Without dead ends: 163 [2018-09-26 21:47:48,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:48,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-26 21:47:48,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-26 21:47:48,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-26 21:47:48,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-09-26 21:47:48,310 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2018-09-26 21:47:48,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:48,310 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-09-26 21:47:48,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-26 21:47:48,310 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-09-26 21:47:48,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-26 21:47:48,311 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:48,312 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-09-26 21:47:48,312 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:48,312 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:48,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 79 times [2018-09-26 21:47:48,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:48,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:48,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:48,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:48,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:48,933 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:48,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:48,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:47:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:49,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:49,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:49,511 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:49,511 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-26 21:47:49,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-26 21:47:49,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-26 21:47:49,512 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:49,512 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2018-09-26 21:47:50,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:50,214 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-09-26 21:47:50,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-26 21:47:50,214 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-09-26 21:47:50,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:50,215 INFO L225 Difference]: With dead ends: 167 [2018-09-26 21:47:50,215 INFO L226 Difference]: Without dead ends: 165 [2018-09-26 21:47:50,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:50,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-26 21:47:50,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-26 21:47:50,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-26 21:47:50,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-09-26 21:47:50,218 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2018-09-26 21:47:50,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:50,218 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-09-26 21:47:50,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-26 21:47:50,218 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-09-26 21:47:50,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-26 21:47:50,219 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:50,219 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1] [2018-09-26 21:47:50,220 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:50,220 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:50,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1606111769, now seen corresponding path program 80 times [2018-09-26 21:47:50,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:50,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:50,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:50,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:47:50,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:50,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:51,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:51,039 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:51,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:51,046 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:47:51,139 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:47:51,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:51,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:51,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:51,595 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:51,595 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-26 21:47:51,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-26 21:47:51,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-26 21:47:51,597 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:51,597 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2018-09-26 21:47:52,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:52,409 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-09-26 21:47:52,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-26 21:47:52,409 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-09-26 21:47:52,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:52,410 INFO L225 Difference]: With dead ends: 169 [2018-09-26 21:47:52,410 INFO L226 Difference]: Without dead ends: 167 [2018-09-26 21:47:52,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:52,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-26 21:47:52,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-26 21:47:52,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-26 21:47:52,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-09-26 21:47:52,413 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2018-09-26 21:47:52,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:52,413 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-09-26 21:47:52,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-26 21:47:52,413 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-09-26 21:47:52,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-26 21:47:52,414 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:52,414 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-09-26 21:47:52,414 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:52,414 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:52,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 81 times [2018-09-26 21:47:52,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:52,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:52,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:52,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:52,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:52,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:53,009 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:53,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:53,017 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:47:55,114 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-09-26 21:47:55,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:55,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:55,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:55,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:55,575 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-26 21:47:55,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-26 21:47:55,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-26 21:47:55,577 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:55,577 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2018-09-26 21:47:56,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:56,428 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-09-26 21:47:56,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-26 21:47:56,428 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-09-26 21:47:56,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:56,429 INFO L225 Difference]: With dead ends: 171 [2018-09-26 21:47:56,429 INFO L226 Difference]: Without dead ends: 169 [2018-09-26 21:47:56,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:56,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-26 21:47:56,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-26 21:47:56,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-26 21:47:56,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-09-26 21:47:56,432 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2018-09-26 21:47:56,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:56,432 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-09-26 21:47:56,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-26 21:47:56,432 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-09-26 21:47:56,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-26 21:47:56,433 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:56,433 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1] [2018-09-26 21:47:56,433 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:56,433 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:56,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1943667419, now seen corresponding path program 82 times [2018-09-26 21:47:56,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:56,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:56,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:56,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:56,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:56,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:57,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:57,236 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:57,236 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:57,245 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:47:57,327 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:47:57,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:57,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:57,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:57,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:57,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-26 21:47:57,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-26 21:47:57,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-26 21:47:57,875 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:57,875 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2018-09-26 21:47:58,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:58,515 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-09-26 21:47:58,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-26 21:47:58,516 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-09-26 21:47:58,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:58,516 INFO L225 Difference]: With dead ends: 173 [2018-09-26 21:47:58,517 INFO L226 Difference]: Without dead ends: 171 [2018-09-26 21:47:58,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:58,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-26 21:47:58,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-26 21:47:58,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-26 21:47:58,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-09-26 21:47:58,520 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2018-09-26 21:47:58,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:58,520 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-09-26 21:47:58,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-26 21:47:58,521 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-09-26 21:47:58,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-26 21:47:58,521 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:58,521 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-09-26 21:47:58,521 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:58,522 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:58,522 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 83 times [2018-09-26 21:47:58,522 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:58,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:58,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:58,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:58,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:58,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:59,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:59,200 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:59,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:59,207 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:48:06,768 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-09-26 21:48:06,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:06,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:07,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:07,238 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:07,239 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-26 21:48:07,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-26 21:48:07,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-26 21:48:07,240 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:07,240 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2018-09-26 21:48:07,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:07,901 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-09-26 21:48:07,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-26 21:48:07,901 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-09-26 21:48:07,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:07,902 INFO L225 Difference]: With dead ends: 175 [2018-09-26 21:48:07,902 INFO L226 Difference]: Without dead ends: 173 [2018-09-26 21:48:07,902 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:07,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-26 21:48:07,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-26 21:48:07,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-26 21:48:07,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-09-26 21:48:07,905 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2018-09-26 21:48:07,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:07,905 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-09-26 21:48:07,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-26 21:48:07,905 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-09-26 21:48:07,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-26 21:48:07,906 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:07,906 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1] [2018-09-26 21:48:07,906 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:07,906 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:07,907 INFO L82 PathProgramCache]: Analyzing trace with hash 571719119, now seen corresponding path program 84 times [2018-09-26 21:48:07,907 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:07,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:07,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:07,907 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:07,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:07,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:08,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:08,564 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:08,564 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:08,575 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:48:10,437 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-09-26 21:48:10,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:10,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:10,882 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:10,907 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:10,907 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-26 21:48:10,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-26 21:48:10,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-26 21:48:10,909 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:10,909 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2018-09-26 21:48:11,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:11,674 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-09-26 21:48:11,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-26 21:48:11,675 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-09-26 21:48:11,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:11,676 INFO L225 Difference]: With dead ends: 177 [2018-09-26 21:48:11,676 INFO L226 Difference]: Without dead ends: 175 [2018-09-26 21:48:11,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:11,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-26 21:48:11,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-26 21:48:11,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-26 21:48:11,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-09-26 21:48:11,679 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2018-09-26 21:48:11,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:11,680 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-09-26 21:48:11,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-26 21:48:11,680 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-09-26 21:48:11,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-26 21:48:11,681 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:11,681 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-09-26 21:48:11,681 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:11,681 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:11,681 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 85 times [2018-09-26 21:48:11,681 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:11,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:11,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:11,682 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:11,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:11,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:12,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:12,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:12,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:12,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:48:12,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:12,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:12,931 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:12,931 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-26 21:48:12,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-26 21:48:12,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-26 21:48:12,933 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:12,933 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2018-09-26 21:48:13,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:13,604 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-09-26 21:48:13,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-26 21:48:13,604 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-09-26 21:48:13,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:13,605 INFO L225 Difference]: With dead ends: 179 [2018-09-26 21:48:13,605 INFO L226 Difference]: Without dead ends: 177 [2018-09-26 21:48:13,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:13,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-26 21:48:13,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-09-26 21:48:13,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-26 21:48:13,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-09-26 21:48:13,609 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2018-09-26 21:48:13,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:13,609 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-09-26 21:48:13,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-26 21:48:13,609 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-09-26 21:48:13,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-26 21:48:13,610 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:13,610 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1] [2018-09-26 21:48:13,610 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:13,610 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:13,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1448009411, now seen corresponding path program 86 times [2018-09-26 21:48:13,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:13,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:13,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:13,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:48:13,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:13,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:14,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:14,303 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:14,303 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:14,311 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:48:14,399 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:48:14,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:14,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:14,897 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:14,897 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-26 21:48:14,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-26 21:48:14,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-26 21:48:14,899 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:14,899 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2018-09-26 21:48:15,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:15,711 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-09-26 21:48:15,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-26 21:48:15,711 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-09-26 21:48:15,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:15,712 INFO L225 Difference]: With dead ends: 181 [2018-09-26 21:48:15,712 INFO L226 Difference]: Without dead ends: 179 [2018-09-26 21:48:15,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:15,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-26 21:48:15,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-26 21:48:15,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-26 21:48:15,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-09-26 21:48:15,715 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2018-09-26 21:48:15,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:15,715 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-09-26 21:48:15,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-26 21:48:15,715 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-09-26 21:48:15,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-26 21:48:15,716 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:15,716 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-09-26 21:48:15,716 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:15,716 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:15,716 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 87 times [2018-09-26 21:48:15,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:15,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:15,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:15,717 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:15,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:15,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:16,557 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:16,557 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:16,557 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:16,565 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:48:19,292 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-09-26 21:48:19,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:19,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:19,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:19,804 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:19,804 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-26 21:48:19,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-26 21:48:19,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-26 21:48:19,806 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:19,806 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2018-09-26 21:48:20,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:20,556 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-09-26 21:48:20,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-26 21:48:20,561 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-09-26 21:48:20,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:20,562 INFO L225 Difference]: With dead ends: 183 [2018-09-26 21:48:20,562 INFO L226 Difference]: Without dead ends: 181 [2018-09-26 21:48:20,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:20,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-26 21:48:20,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-26 21:48:20,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-26 21:48:20,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-09-26 21:48:20,566 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2018-09-26 21:48:20,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:20,566 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-09-26 21:48:20,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-26 21:48:20,566 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-09-26 21:48:20,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-26 21:48:20,567 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:20,567 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1] [2018-09-26 21:48:20,567 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:20,567 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:20,567 INFO L82 PathProgramCache]: Analyzing trace with hash -983013961, now seen corresponding path program 88 times [2018-09-26 21:48:20,568 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:20,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:20,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:20,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:20,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:20,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:21,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:21,361 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:21,361 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:21,368 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:48:21,457 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:48:21,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:21,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:21,969 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:21,969 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-26 21:48:21,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-26 21:48:21,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-26 21:48:21,971 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:21,971 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2018-09-26 21:48:22,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:22,817 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-09-26 21:48:22,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-26 21:48:22,817 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-09-26 21:48:22,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:22,818 INFO L225 Difference]: With dead ends: 185 [2018-09-26 21:48:22,818 INFO L226 Difference]: Without dead ends: 183 [2018-09-26 21:48:22,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:22,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-26 21:48:22,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-09-26 21:48:22,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-26 21:48:22,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-09-26 21:48:22,821 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2018-09-26 21:48:22,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:22,821 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-09-26 21:48:22,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-26 21:48:22,821 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-09-26 21:48:22,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-26 21:48:22,822 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:22,822 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-09-26 21:48:22,822 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:22,822 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:22,823 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 89 times [2018-09-26 21:48:22,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:22,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:22,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:22,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:22,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:22,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:23,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:23,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:23,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:23,587 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:48:33,486 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-09-26 21:48:33,487 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:33,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:34,039 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:34,039 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-26 21:48:34,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-26 21:48:34,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-26 21:48:34,041 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:34,041 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2018-09-26 21:48:34,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:34,780 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-09-26 21:48:34,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-26 21:48:34,780 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-09-26 21:48:34,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:34,781 INFO L225 Difference]: With dead ends: 187 [2018-09-26 21:48:34,781 INFO L226 Difference]: Without dead ends: 185 [2018-09-26 21:48:34,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:34,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-26 21:48:34,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-26 21:48:34,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-26 21:48:34,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-09-26 21:48:34,784 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2018-09-26 21:48:34,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:34,784 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-09-26 21:48:34,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-26 21:48:34,784 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-09-26 21:48:34,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-26 21:48:34,785 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:34,785 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1] [2018-09-26 21:48:34,785 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:34,785 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:34,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1841124011, now seen corresponding path program 90 times [2018-09-26 21:48:34,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:34,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:34,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:34,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:34,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:34,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:35,550 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:35,550 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:35,559 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:48:37,858 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-09-26 21:48:37,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:37,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:38,397 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:38,422 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:38,422 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-26 21:48:38,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-26 21:48:38,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-26 21:48:38,423 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:38,424 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2018-09-26 21:48:39,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:39,242 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-09-26 21:48:39,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-26 21:48:39,243 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2018-09-26 21:48:39,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:39,244 INFO L225 Difference]: With dead ends: 189 [2018-09-26 21:48:39,244 INFO L226 Difference]: Without dead ends: 187 [2018-09-26 21:48:39,244 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:39,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-26 21:48:39,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-26 21:48:39,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-26 21:48:39,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-09-26 21:48:39,248 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2018-09-26 21:48:39,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:39,248 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-09-26 21:48:39,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-26 21:48:39,248 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-09-26 21:48:39,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-26 21:48:39,249 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:39,249 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-09-26 21:48:39,249 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:39,250 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:39,250 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 91 times [2018-09-26 21:48:39,250 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:39,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:39,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:39,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:39,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:40,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:40,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:40,065 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:40,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:48:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:40,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:40,740 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:40,740 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-26 21:48:40,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-26 21:48:40,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-26 21:48:40,742 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:40,742 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2018-09-26 21:48:41,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:41,549 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-09-26 21:48:41,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-26 21:48:41,549 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-09-26 21:48:41,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:41,550 INFO L225 Difference]: With dead ends: 191 [2018-09-26 21:48:41,550 INFO L226 Difference]: Without dead ends: 189 [2018-09-26 21:48:41,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:41,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-26 21:48:41,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-26 21:48:41,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-26 21:48:41,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-09-26 21:48:41,554 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2018-09-26 21:48:41,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:41,554 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-09-26 21:48:41,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-26 21:48:41,554 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-09-26 21:48:41,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-26 21:48:41,555 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:41,555 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1] [2018-09-26 21:48:41,555 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:41,556 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:41,556 INFO L82 PathProgramCache]: Analyzing trace with hash -685070945, now seen corresponding path program 92 times [2018-09-26 21:48:41,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:41,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:41,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:41,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:48:41,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:41,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:42,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:42,519 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:42,519 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:42,526 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:48:42,620 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:48:42,621 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:42,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:43,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:43,228 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:43,228 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-26 21:48:43,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-26 21:48:43,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-26 21:48:43,230 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:43,230 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2018-09-26 21:48:44,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:44,032 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-09-26 21:48:44,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-26 21:48:44,032 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2018-09-26 21:48:44,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:44,033 INFO L225 Difference]: With dead ends: 193 [2018-09-26 21:48:44,033 INFO L226 Difference]: Without dead ends: 191 [2018-09-26 21:48:44,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:44,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-26 21:48:44,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-26 21:48:44,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-26 21:48:44,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-09-26 21:48:44,036 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2018-09-26 21:48:44,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:44,037 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-09-26 21:48:44,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-26 21:48:44,037 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-09-26 21:48:44,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-26 21:48:44,037 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:44,037 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1] [2018-09-26 21:48:44,038 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:44,038 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:44,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1223129767, now seen corresponding path program 93 times [2018-09-26 21:48:44,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:44,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:44,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:44,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:44,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:44,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:44,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:44,858 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:44,858 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:44,874 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:48:48,500 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-09-26 21:48:48,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:48,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:49,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:49,064 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:49,064 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-26 21:48:49,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-26 21:48:49,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-26 21:48:49,066 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:49,066 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2018-09-26 21:48:50,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:50,033 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-09-26 21:48:50,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-26 21:48:50,033 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-09-26 21:48:50,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:50,034 INFO L225 Difference]: With dead ends: 195 [2018-09-26 21:48:50,034 INFO L226 Difference]: Without dead ends: 193 [2018-09-26 21:48:50,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:50,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-26 21:48:50,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-26 21:48:50,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-26 21:48:50,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-09-26 21:48:50,037 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2018-09-26 21:48:50,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:50,037 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-09-26 21:48:50,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-26 21:48:50,037 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-09-26 21:48:50,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-26 21:48:50,038 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:50,038 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1] [2018-09-26 21:48:50,038 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:50,038 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:50,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1393385107, now seen corresponding path program 94 times [2018-09-26 21:48:50,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:50,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:50,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:50,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:50,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:50,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:50,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:50,877 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:50,877 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:50,884 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:48:50,981 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:48:50,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:50,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:51,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:51,551 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:51,551 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-26 21:48:51,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-26 21:48:51,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-26 21:48:51,553 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:51,553 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2018-09-26 21:48:52,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:52,398 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-09-26 21:48:52,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-26 21:48:52,398 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2018-09-26 21:48:52,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:52,399 INFO L225 Difference]: With dead ends: 197 [2018-09-26 21:48:52,399 INFO L226 Difference]: Without dead ends: 195 [2018-09-26 21:48:52,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:52,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-26 21:48:52,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-26 21:48:52,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-26 21:48:52,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-09-26 21:48:52,402 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2018-09-26 21:48:52,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:52,402 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-09-26 21:48:52,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-26 21:48:52,402 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-09-26 21:48:52,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-26 21:48:52,403 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:52,403 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1] [2018-09-26 21:48:52,403 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:52,403 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:52,403 INFO L82 PathProgramCache]: Analyzing trace with hash -986656435, now seen corresponding path program 95 times [2018-09-26 21:48:52,403 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:52,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:52,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:52,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:52,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:53,256 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:53,256 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:53,264 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:49:06,899 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-09-26 21:49:06,900 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:06,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:07,521 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:07,521 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-26 21:49:07,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-26 21:49:07,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-26 21:49:07,523 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:07,523 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 98 states. [2018-09-26 21:49:08,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:08,526 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-09-26 21:49:08,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-26 21:49:08,527 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-09-26 21:49:08,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:08,527 INFO L225 Difference]: With dead ends: 199 [2018-09-26 21:49:08,527 INFO L226 Difference]: Without dead ends: 197 [2018-09-26 21:49:08,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:08,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-26 21:49:08,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-26 21:49:08,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-26 21:49:08,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-09-26 21:49:08,531 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2018-09-26 21:49:08,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:08,531 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-09-26 21:49:08,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-26 21:49:08,531 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-09-26 21:49:08,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-26 21:49:08,532 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:08,533 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1] [2018-09-26 21:49:08,533 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:08,533 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:08,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1010990471, now seen corresponding path program 96 times [2018-09-26 21:49:08,533 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:08,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:08,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:08,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:08,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:09,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:09,402 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:09,402 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:09,409 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:49:12,461 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-09-26 21:49:12,461 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:12,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:13,161 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:13,161 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-26 21:49:13,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-26 21:49:13,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-26 21:49:13,163 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:13,163 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 99 states. [2018-09-26 21:49:14,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:14,017 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-09-26 21:49:14,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-26 21:49:14,017 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 196 [2018-09-26 21:49:14,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:14,018 INFO L225 Difference]: With dead ends: 201 [2018-09-26 21:49:14,018 INFO L226 Difference]: Without dead ends: 199 [2018-09-26 21:49:14,018 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:14,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-26 21:49:14,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-26 21:49:14,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-26 21:49:14,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-09-26 21:49:14,022 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2018-09-26 21:49:14,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:14,022 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-09-26 21:49:14,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-26 21:49:14,023 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-09-26 21:49:14,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-26 21:49:14,023 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:14,024 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1] [2018-09-26 21:49:14,024 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:14,024 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:14,024 INFO L82 PathProgramCache]: Analyzing trace with hash 899285825, now seen corresponding path program 97 times [2018-09-26 21:49:14,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:14,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:14,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:14,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:14,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:14,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:14,864 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:14,864 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:14,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:49:14,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:14,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:15,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:15,565 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:15,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-26 21:49:15,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-26 21:49:15,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-26 21:49:15,567 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:15,567 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 100 states. [2018-09-26 21:49:16,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:16,507 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-09-26 21:49:16,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-26 21:49:16,507 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2018-09-26 21:49:16,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:16,508 INFO L225 Difference]: With dead ends: 203 [2018-09-26 21:49:16,508 INFO L226 Difference]: Without dead ends: 201 [2018-09-26 21:49:16,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:16,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-26 21:49:16,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-09-26 21:49:16,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-26 21:49:16,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2018-09-26 21:49:16,522 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2018-09-26 21:49:16,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:16,522 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2018-09-26 21:49:16,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-26 21:49:16,522 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2018-09-26 21:49:16,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-26 21:49:16,523 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:16,523 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1] [2018-09-26 21:49:16,523 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:16,523 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:16,523 INFO L82 PathProgramCache]: Analyzing trace with hash 925303419, now seen corresponding path program 98 times [2018-09-26 21:49:16,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:16,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:16,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:16,524 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:49:16,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:16,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:17,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:17,416 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:17,416 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:17,436 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:49:17,535 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:49:17,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:17,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:18,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:18,181 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:18,181 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-26 21:49:18,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-26 21:49:18,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-26 21:49:18,183 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:18,183 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 101 states. [2018-09-26 21:49:19,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:19,125 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-09-26 21:49:19,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-26 21:49:19,126 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 200 [2018-09-26 21:49:19,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:19,126 INFO L225 Difference]: With dead ends: 205 [2018-09-26 21:49:19,126 INFO L226 Difference]: Without dead ends: 203 [2018-09-26 21:49:19,127 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:19,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-26 21:49:19,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-26 21:49:19,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-26 21:49:19,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-09-26 21:49:19,129 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 200 [2018-09-26 21:49:19,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:19,130 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-09-26 21:49:19,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-26 21:49:19,130 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-09-26 21:49:19,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-26 21:49:19,130 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:19,130 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 1, 1, 1] [2018-09-26 21:49:19,131 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:19,131 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:19,131 INFO L82 PathProgramCache]: Analyzing trace with hash 158407477, now seen corresponding path program 99 times [2018-09-26 21:49:19,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:19,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:19,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:19,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:19,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:20,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:20,045 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:20,045 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:20,052 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:49:24,598 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-09-26 21:49:24,598 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:24,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:25,188 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:25,189 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-26 21:49:25,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-26 21:49:25,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-26 21:49:25,191 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:25,191 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 102 states. [2018-09-26 21:49:26,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:26,144 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2018-09-26 21:49:26,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-26 21:49:26,144 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 202 [2018-09-26 21:49:26,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:26,145 INFO L225 Difference]: With dead ends: 207 [2018-09-26 21:49:26,145 INFO L226 Difference]: Without dead ends: 205 [2018-09-26 21:49:26,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:26,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-26 21:49:26,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-26 21:49:26,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-26 21:49:26,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2018-09-26 21:49:26,148 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 202 [2018-09-26 21:49:26,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:26,148 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2018-09-26 21:49:26,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-26 21:49:26,148 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2018-09-26 21:49:26,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-09-26 21:49:26,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:26,149 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 1, 1, 1] [2018-09-26 21:49:26,149 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:26,150 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:26,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1905782127, now seen corresponding path program 100 times [2018-09-26 21:49:26,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:26,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:26,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:26,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:26,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:27,076 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:27,076 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:27,076 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:27,084 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:49:27,183 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:49:27,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:27,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:27,758 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:27,778 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:27,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-26 21:49:27,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-26 21:49:27,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-26 21:49:27,780 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:27,780 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand 103 states. [2018-09-26 21:49:28,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:28,828 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-09-26 21:49:28,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-26 21:49:28,828 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 204 [2018-09-26 21:49:28,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:28,829 INFO L225 Difference]: With dead ends: 209 [2018-09-26 21:49:28,829 INFO L226 Difference]: Without dead ends: 207 [2018-09-26 21:49:28,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:28,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-26 21:49:28,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-09-26 21:49:28,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-09-26 21:49:28,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2018-09-26 21:49:28,833 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 204 [2018-09-26 21:49:28,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:28,833 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2018-09-26 21:49:28,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-26 21:49:28,834 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2018-09-26 21:49:28,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-26 21:49:28,835 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:28,835 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 1, 1, 1] [2018-09-26 21:49:28,835 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:28,836 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:28,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1800608041, now seen corresponding path program 101 times [2018-09-26 21:49:28,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:28,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:28,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:28,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:28,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:29,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:29,771 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:29,771 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:29,791 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:49:46,289 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-09-26 21:49:46,289 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:46,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:46,959 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:46,987 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:46,987 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-26 21:49:46,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-26 21:49:46,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-26 21:49:46,990 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:46,990 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 104 states. [2018-09-26 21:49:48,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:48,304 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-09-26 21:49:48,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-26 21:49:48,305 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 206 [2018-09-26 21:49:48,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:48,305 INFO L225 Difference]: With dead ends: 211 [2018-09-26 21:49:48,305 INFO L226 Difference]: Without dead ends: 209 [2018-09-26 21:49:48,306 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:48,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-26 21:49:48,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-09-26 21:49:48,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-26 21:49:48,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2018-09-26 21:49:48,308 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 206 [2018-09-26 21:49:48,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:48,308 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2018-09-26 21:49:48,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-26 21:49:48,309 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2018-09-26 21:49:48,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-26 21:49:48,309 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:48,309 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 1, 1, 1] [2018-09-26 21:49:48,309 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:48,310 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:48,310 INFO L82 PathProgramCache]: Analyzing trace with hash -487440797, now seen corresponding path program 102 times [2018-09-26 21:49:48,310 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:48,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:48,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:48,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:48,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:49,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:49,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:49,313 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:49,321 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:49:53,081 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-09-26 21:49:53,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:53,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:53,850 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:53,850 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-26 21:49:53,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-26 21:49:53,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-26 21:49:53,852 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:53,852 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 105 states. [2018-09-26 21:49:54,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:54,954 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-09-26 21:49:54,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-26 21:49:54,954 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 208 [2018-09-26 21:49:54,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:54,955 INFO L225 Difference]: With dead ends: 213 [2018-09-26 21:49:54,955 INFO L226 Difference]: Without dead ends: 211 [2018-09-26 21:49:54,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:54,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-26 21:49:54,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-26 21:49:54,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-26 21:49:54,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2018-09-26 21:49:54,959 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 208 [2018-09-26 21:49:54,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:54,959 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2018-09-26 21:49:54,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-26 21:49:54,959 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2018-09-26 21:49:54,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-26 21:49:54,960 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:54,960 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 1, 1, 1] [2018-09-26 21:49:54,961 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:54,961 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:54,961 INFO L82 PathProgramCache]: Analyzing trace with hash -279118563, now seen corresponding path program 103 times [2018-09-26 21:49:54,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:54,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:54,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:54,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:54,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:55,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:55,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:55,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:55,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:55,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:49:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:56,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:56,719 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:56,740 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:56,740 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-26 21:49:56,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-26 21:49:56,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-26 21:49:56,742 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:56,743 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 106 states. [2018-09-26 21:49:57,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:57,800 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2018-09-26 21:49:57,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-26 21:49:57,801 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 210 [2018-09-26 21:49:57,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:57,801 INFO L225 Difference]: With dead ends: 215 [2018-09-26 21:49:57,801 INFO L226 Difference]: Without dead ends: 213 [2018-09-26 21:49:57,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:57,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-09-26 21:49:57,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-09-26 21:49:57,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-09-26 21:49:57,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2018-09-26 21:49:57,805 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 210 [2018-09-26 21:49:57,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:57,806 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2018-09-26 21:49:57,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-26 21:49:57,806 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2018-09-26 21:49:57,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-26 21:49:57,807 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:57,807 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 1, 1, 1] [2018-09-26 21:49:57,807 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:57,807 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:57,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1944914601, now seen corresponding path program 104 times [2018-09-26 21:49:57,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:57,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:57,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:57,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:49:57,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:57,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:59,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:59,059 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:59,059 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:59,066 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:49:59,168 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:49:59,169 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:59,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:59,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:59,881 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-26 21:49:59,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-26 21:49:59,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-26 21:49:59,884 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:59,884 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 107 states. [2018-09-26 21:50:01,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:50:01,236 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-09-26 21:50:01,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-26 21:50:01,237 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 212 [2018-09-26 21:50:01,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:50:01,237 INFO L225 Difference]: With dead ends: 217 [2018-09-26 21:50:01,237 INFO L226 Difference]: Without dead ends: 215 [2018-09-26 21:50:01,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:50:01,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-09-26 21:50:01,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-09-26 21:50:01,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-26 21:50:01,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-09-26 21:50:01,241 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 212 [2018-09-26 21:50:01,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:50:01,242 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-09-26 21:50:01,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-26 21:50:01,242 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-09-26 21:50:01,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-09-26 21:50:01,242 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:50:01,243 INFO L375 BasicCegarLoop]: trace histogram [106, 105, 1, 1, 1] [2018-09-26 21:50:01,243 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:50:01,243 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:50:01,243 INFO L82 PathProgramCache]: Analyzing trace with hash -752105711, now seen corresponding path program 105 times [2018-09-26 21:50:01,243 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:50:01,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:50:01,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:01,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:50:01,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:02,318 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:02,319 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:50:02,319 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:50:02,327 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... [2018-09-26 21:50:07,856 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 106 check-sat command(s) [2018-09-26 21:50:07,856 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:50:07,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:50:07,875 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-26 21:50:08,076 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:50:08,076 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 21:50:08,081 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 21:50:08,081 INFO L202 PluginConnector]: Adding new model array2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:50:08 BoogieIcfgContainer [2018-09-26 21:50:08,082 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:50:08,082 INFO L168 Benchmark]: Toolchain (without parser) took 259089.98 ms. Allocated memory was 1.5 GB in the beginning and 2.0 GB in the end (delta: 450.4 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 376.8 MB). Peak memory consumption was 827.2 MB. Max. memory is 7.1 GB. [2018-09-26 21:50:08,084 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:50:08,084 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.36 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:50:08,084 INFO L168 Benchmark]: Boogie Preprocessor took 20.99 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:50:08,085 INFO L168 Benchmark]: RCFGBuilder took 303.88 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-26 21:50:08,085 INFO L168 Benchmark]: TraceAbstraction took 258714.68 ms. Allocated memory was 1.5 GB in the beginning and 2.0 GB in the end (delta: 450.4 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 355.7 MB). Peak memory consumption was 806.1 MB. Max. memory is 7.1 GB. [2018-09-26 21:50:08,088 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 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.36 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.99 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 303.88 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 258714.68 ms. Allocated memory was 1.5 GB in the beginning and 2.0 GB in the end (delta: 450.4 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 355.7 MB). Peak memory consumption was 806.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 42]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 42). Cancelled while BasicCegarLoop was analyzing trace of length 215 with TraceHistMax 106, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 258.6s OverallTime, 106 OverallIterations, 106 TraceHistogramMax, 52.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 420 SDtfs, 0 SDslu, 8606 SDs, 0 SdLazy, 8711 SolverSat, 191 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16902 GetRequests, 11337 SyntacticMatches, 0 SemanticMatches, 5565 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=215occurred in iteration=105, 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, 105 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.3s SsaConstructionTime, 103.9s SatisfiabilityAnalysisTime, 87.5s InterpolantComputationTime, 22676 NumberOfCodeBlocks, 22676 NumberOfCodeBlocksAsserted, 2930 NumberOfCheckSat, 22467 ConstructedInterpolants, 0 QuantifiedInterpolants, 9482949 SizeOfPredicates, 104 NumberOfNonLiveVariables, 39572 ConjunctsInSsa, 5668 ConjunctsInUnsatCore, 209 InterpolantComputations, 1 PerfectInterpolantSequences, 0/771680 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/array2.i_3.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_21-50-08-099.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/array2.i_3.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_21-50-08-099.csv Completed graceful shutdown