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/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c372c2b [2018-10-02 12:17:57,746 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 12:17:57,749 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 12:17:57,765 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-02 12:17:57,766 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-02 12:17:57,767 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-02 12:17:57,768 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-02 12:17:57,770 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-02 12:17:57,771 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-02 12:17:57,772 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-02 12:17:57,773 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-02 12:17:57,773 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-02 12:17:57,774 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-02 12:17:57,775 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-02 12:17:57,776 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-02 12:17:57,777 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-02 12:17:57,778 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-02 12:17:57,780 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-02 12:17:57,782 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-02 12:17:57,783 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-02 12:17:57,784 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-02 12:17:57,786 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-02 12:17:57,788 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-02 12:17:57,797 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 [2018-10-02 12:17:57,812 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 12:17:57,813 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 12:17:57,814 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 12:17:57,814 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 12:17:57,815 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 12:17:57,815 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 12:17:57,815 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 12:17:57,816 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 12:17:57,816 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 12:17:57,816 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 12:17:57,816 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 12:17:57,817 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 12:17:57,818 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 12:17:57,818 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 12:17:57,818 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 12:17:57,818 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 12:17:57,818 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 12:17:57,818 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 12:17:57,819 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 12:17:57,819 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 12:17:57,819 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 12:17:57,819 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 12:17:57,820 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 12:17:57,821 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 12:17:57,821 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 12:17:57,821 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 12:17:57,821 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 12:17:57,822 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 12:17:57,822 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 12:17:57,822 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 12:17:57,822 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-02 12:17:57,865 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 12:17:57,891 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 12:17:57,896 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 12:17:57,898 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 12:17:57,899 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 12:17:57,900 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl [2018-10-02 12:17:57,900 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl' [2018-10-02 12:17:57,954 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 12:17:57,957 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 12:17:57,958 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 12:17:57,958 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 12:17:57,959 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 12:17:57,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:57" (1/1) ... [2018-10-02 12:17:57,992 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:57" (1/1) ... [2018-10-02 12:17:57,997 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-02 12:17:57,997 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-02 12:17:57,997 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-02 12:17:57,999 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 12:17:58,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 12:17:58,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 12:17:58,000 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 12:17:58,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:57" (1/1) ... [2018-10-02 12:17:58,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:57" (1/1) ... [2018-10-02 12:17:58,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:57" (1/1) ... [2018-10-02 12:17:58,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:57" (1/1) ... [2018-10-02 12:17:58,015 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:57" (1/1) ... [2018-10-02 12:17:58,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:57" (1/1) ... [2018-10-02 12:17:58,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:57" (1/1) ... [2018-10-02 12:17:58,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 12:17:58,021 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 12:17:58,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 12:17:58,022 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 12:17:58,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 12:17:58,096 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-02 12:17:58,097 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-02 12:17:58,097 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-02 12:17:58,295 INFO L337 CfgBuilder]: Using library mode [2018-10-02 12:17:58,296 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:17:58 BoogieIcfgContainer [2018-10-02 12:17:58,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 12:17:58,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 12:17:58,298 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 12:17:58,304 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 12:17:58,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:17:57" (1/2) ... [2018-10-02 12:17:58,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a571697 and model type DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 12:17:58, skipping insertion in model container [2018-10-02 12:17:58,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:17:58" (2/2) ... [2018-10-02 12:17:58,308 INFO L112 eAbstractionObserver]: Analyzing ICFG DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl [2018-10-02 12:17:58,319 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 12:17:58,331 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 12:17:58,389 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 12:17:58,389 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 12:17:58,390 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 12:17:58,390 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 12:17:58,390 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 12:17:58,390 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 12:17:58,390 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 12:17:58,391 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 12:17:58,391 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 12:17:58,409 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-10-02 12:17:58,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-10-02 12:17:58,421 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:58,423 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-10-02 12:17:58,424 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:58,435 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:58,436 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-10-02 12:17:58,438 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:58,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:58,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:58,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:17:58,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:58,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:58,625 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 12:17:58,625 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-02 12:17:58,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 12:17:58,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 12:17:58,641 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:58,643 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-10-02 12:17:58,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:58,813 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-02 12:17:58,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 12:17:58,815 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-10-02 12:17:58,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:58,829 INFO L225 Difference]: With dead ends: 9 [2018-10-02 12:17:58,830 INFO L226 Difference]: Without dead ends: 4 [2018-10-02 12:17:58,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime [2018-10-02 12:17:58,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-10-02 12:17:58,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-10-02 12:17:58,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-10-02 12:17:58,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-10-02 12:17:58,878 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-10-02 12:17:58,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:58,879 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-10-02 12:17:58,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 12:17:58,879 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-10-02 12:17:58,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-02 12:17:58,880 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:58,880 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-02 12:17:58,881 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:58,881 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:58,881 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-10-02 12:17:58,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:58,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:58,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:58,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:17:58,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:58,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:59,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:59,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:59,032 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:17:59,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:17:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:59,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:59,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:59,216 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:59,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-10-02 12:17:59,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 12:17:59,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 12:17:59,217 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:59,217 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 6 states. [2018-10-02 12:17:59,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:17:59,445 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-10-02 12:17:59,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 12:17:59,445 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-10-02 12:17:59,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:17:59,446 INFO L225 Difference]: With dead ends: 6 [2018-10-02 12:17:59,446 INFO L226 Difference]: Without dead ends: 5 [2018-10-02 12:17:59,447 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime [2018-10-02 12:17:59,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-10-02 12:17:59,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-10-02 12:17:59,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-02 12:17:59,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-10-02 12:17:59,451 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-10-02 12:17:59,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:17:59,451 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-10-02 12:17:59,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 12:17:59,451 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-10-02 12:17:59,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-02 12:17:59,452 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:17:59,452 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-10-02 12:17:59,453 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:17:59,453 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:17:59,453 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-10-02 12:17:59,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:17:59,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:17:59,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:59,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:17:59,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:17:59,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:59,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:59,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:59,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:17:59,651 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:17:59,688 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:17:59,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:17:59,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:17:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:59,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:17:59,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-10-02 12:17:59,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 12:17:59,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 12:17:59,889 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:17:59,890 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 8 states. [2018-10-02 12:18:00,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:00,390 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-10-02 12:18:00,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 12:18:00,391 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-10-02 12:18:00,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:00,392 INFO L225 Difference]: With dead ends: 7 [2018-10-02 12:18:00,392 INFO L226 Difference]: Without dead ends: 6 [2018-10-02 12:18:00,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime [2018-10-02 12:18:00,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-02 12:18:00,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-02 12:18:00,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-02 12:18:00,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-02 12:18:00,396 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-02 12:18:00,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:00,397 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-02 12:18:00,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 12:18:00,397 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-02 12:18:00,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-02 12:18:00,398 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:00,398 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-10-02 12:18:00,398 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:00,399 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:00,399 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-10-02 12:18:00,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:00,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:00,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:00,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:00,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:00,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:00,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:00,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:00,515 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:00,525 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:18:00,533 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-02 12:18:00,533 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:00,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:00,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:00,627 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:00,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-10-02 12:18:00,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 12:18:00,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 12:18:00,628 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:00,628 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 10 states. [2018-10-02 12:18:01,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:01,185 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-10-02 12:18:01,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 12:18:01,186 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-10-02 12:18:01,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:01,187 INFO L225 Difference]: With dead ends: 8 [2018-10-02 12:18:01,187 INFO L226 Difference]: Without dead ends: 7 [2018-10-02 12:18:01,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:18:01,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-02 12:18:01,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-02 12:18:01,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-02 12:18:01,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-02 12:18:01,191 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-02 12:18:01,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:01,192 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-02 12:18:01,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 12:18:01,192 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-02 12:18:01,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-02 12:18:01,192 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:01,192 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-10-02 12:18:01,193 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:01,193 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:01,193 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-10-02 12:18:01,193 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:01,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:01,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:01,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:01,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:01,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:01,310 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:01,310 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:01,319 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:18:01,325 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:18:01,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:01,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:01,411 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:01,434 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:01,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-10-02 12:18:01,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 12:18:01,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 12:18:01,435 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:01,435 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 12 states. [2018-10-02 12:18:01,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:01,749 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-02 12:18:01,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 12:18:01,749 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-10-02 12:18:01,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:01,750 INFO L225 Difference]: With dead ends: 9 [2018-10-02 12:18:01,751 INFO L226 Difference]: Without dead ends: 8 [2018-10-02 12:18:01,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:18:01,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-02 12:18:01,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-02 12:18:01,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-02 12:18:01,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-02 12:18:01,755 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-02 12:18:01,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:01,755 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-02 12:18:01,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 12:18:01,755 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-02 12:18:01,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-02 12:18:01,756 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:01,756 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-10-02 12:18:01,756 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:01,757 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:01,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-10-02 12:18:01,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:01,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:01,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:01,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:01,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:01,891 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:01,891 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:01,891 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:01,906 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:18:01,926 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-02 12:18:01,926 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:01,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:02,063 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:02,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:02,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-10-02 12:18:02,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 12:18:02,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 12:18:02,085 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:02,085 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 14 states. [2018-10-02 12:18:02,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:02,600 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-02 12:18:02,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 12:18:02,601 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 7 [2018-10-02 12:18:02,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:02,602 INFO L225 Difference]: With dead ends: 10 [2018-10-02 12:18:02,602 INFO L226 Difference]: Without dead ends: 9 [2018-10-02 12:18:02,603 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime [2018-10-02 12:18:02,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-02 12:18:02,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-02 12:18:02,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-02 12:18:02,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-02 12:18:02,607 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-02 12:18:02,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:02,608 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-02 12:18:02,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 12:18:02,608 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-02 12:18:02,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-02 12:18:02,609 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:02,609 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-10-02 12:18:02,609 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:02,609 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:02,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-10-02 12:18:02,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:02,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:02,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:02,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:02,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:02,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:02,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:02,790 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:02,799 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:18:02,816 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-02 12:18:02,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:02,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:02,937 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:02,959 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:02,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-10-02 12:18:02,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 12:18:02,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 12:18:02,960 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:02,960 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 16 states. [2018-10-02 12:18:03,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:03,332 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-02 12:18:03,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 12:18:03,333 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 8 [2018-10-02 12:18:03,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:03,334 INFO L225 Difference]: With dead ends: 11 [2018-10-02 12:18:03,334 INFO L226 Difference]: Without dead ends: 10 [2018-10-02 12:18:03,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime [2018-10-02 12:18:03,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-02 12:18:03,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-02 12:18:03,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-02 12:18:03,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-02 12:18:03,338 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-02 12:18:03,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:03,339 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-02 12:18:03,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 12:18:03,339 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-02 12:18:03,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-02 12:18:03,339 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:03,340 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-10-02 12:18:03,340 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:03,340 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:03,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-10-02 12:18:03,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:03,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:03,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:03,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:03,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:03,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:03,501 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:03,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:03,502 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:03,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:18:03,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:03,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:03,694 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:03,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:03,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-10-02 12:18:03,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 12:18:03,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 12:18:03,717 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:03,717 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 18 states. [2018-10-02 12:18:04,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:04,264 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-02 12:18:04,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 12:18:04,266 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 9 [2018-10-02 12:18:04,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:04,267 INFO L225 Difference]: With dead ends: 12 [2018-10-02 12:18:04,267 INFO L226 Difference]: Without dead ends: 11 [2018-10-02 12:18:04,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime [2018-10-02 12:18:04,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-02 12:18:04,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-02 12:18:04,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-02 12:18:04,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-02 12:18:04,271 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-02 12:18:04,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:04,272 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-02 12:18:04,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 12:18:04,272 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-02 12:18:04,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-02 12:18:04,272 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:04,273 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-10-02 12:18:04,273 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:04,273 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:04,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-10-02 12:18:04,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:04,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:04,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:04,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:18:04,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:04,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:04,443 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:04,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:04,459 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:18:04,477 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:18:04,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:04,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:04,606 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:04,627 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:04,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-10-02 12:18:04,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 12:18:04,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 12:18:04,629 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:04,629 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 20 states. [2018-10-02 12:18:05,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:05,227 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-02 12:18:05,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 12:18:05,230 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 10 [2018-10-02 12:18:05,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:05,231 INFO L225 Difference]: With dead ends: 13 [2018-10-02 12:18:05,231 INFO L226 Difference]: Without dead ends: 12 [2018-10-02 12:18:05,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime [2018-10-02 12:18:05,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-02 12:18:05,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-02 12:18:05,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-02 12:18:05,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-02 12:18:05,235 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-02 12:18:05,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:05,235 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-02 12:18:05,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 12:18:05,235 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-02 12:18:05,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-02 12:18:05,236 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:05,236 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-10-02 12:18:05,236 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:05,236 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:05,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-10-02 12:18:05,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:05,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:05,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:05,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:05,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:05,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:05,474 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:05,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:05,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:05,484 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:18:05,496 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-02 12:18:05,496 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:05,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:05,659 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:05,680 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:05,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-10-02 12:18:05,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-02 12:18:05,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-02 12:18:05,681 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:05,681 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 22 states. [2018-10-02 12:18:06,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:06,380 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-02 12:18:06,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 12:18:06,380 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 11 [2018-10-02 12:18:06,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:06,381 INFO L225 Difference]: With dead ends: 14 [2018-10-02 12:18:06,381 INFO L226 Difference]: Without dead ends: 13 [2018-10-02 12:18:06,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime [2018-10-02 12:18:06,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-02 12:18:06,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-02 12:18:06,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-02 12:18:06,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-02 12:18:06,386 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-02 12:18:06,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:06,387 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-02 12:18:06,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-02 12:18:06,387 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-02 12:18:06,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-02 12:18:06,387 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:06,387 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-10-02 12:18:06,388 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:06,388 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:06,388 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-10-02 12:18:06,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:06,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:06,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:06,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:06,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:06,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:06,610 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:06,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:06,611 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:06,619 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:18:06,646 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:18:06,647 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:06,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:07,121 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:07,143 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:07,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-10-02 12:18:07,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-02 12:18:07,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-02 12:18:07,144 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:07,145 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 24 states. [2018-10-02 12:18:08,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:08,224 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-02 12:18:08,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 12:18:08,225 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 12 [2018-10-02 12:18:08,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:08,226 INFO L225 Difference]: With dead ends: 15 [2018-10-02 12:18:08,226 INFO L226 Difference]: Without dead ends: 14 [2018-10-02 12:18:08,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime [2018-10-02 12:18:08,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-02 12:18:08,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-02 12:18:08,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-02 12:18:08,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-02 12:18:08,231 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-02 12:18:08,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:08,231 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-02 12:18:08,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-02 12:18:08,231 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-02 12:18:08,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 12:18:08,232 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:08,232 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-10-02 12:18:08,232 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:08,233 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:08,233 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-10-02 12:18:08,233 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:08,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:08,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:08,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:08,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:08,422 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:08,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:08,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:08,432 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:18:08,442 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-02 12:18:08,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:08,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:08,853 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:08,853 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-10-02 12:18:08,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 12:18:08,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 12:18:08,854 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:08,854 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 26 states. [2018-10-02 12:18:09,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:09,906 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-02 12:18:09,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 12:18:09,907 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 13 [2018-10-02 12:18:09,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:09,908 INFO L225 Difference]: With dead ends: 16 [2018-10-02 12:18:09,908 INFO L226 Difference]: Without dead ends: 15 [2018-10-02 12:18:09,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime [2018-10-02 12:18:09,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-02 12:18:09,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-02 12:18:09,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-02 12:18:09,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-02 12:18:09,912 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-02 12:18:09,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:09,912 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-02 12:18:09,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 12:18:09,913 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-02 12:18:09,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-02 12:18:09,913 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:09,913 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-10-02 12:18:09,913 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:09,914 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:09,914 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-10-02 12:18:09,914 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:09,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:09,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:09,915 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:09,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:10,360 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:10,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:10,361 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:10,368 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:18:10,383 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 12:18:10,384 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:10,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:10,615 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:10,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:10,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-10-02 12:18:10,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-02 12:18:10,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-02 12:18:10,639 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:10,639 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 28 states. [2018-10-02 12:18:11,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:11,955 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-02 12:18:11,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 12:18:11,956 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 14 [2018-10-02 12:18:11,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:11,957 INFO L225 Difference]: With dead ends: 17 [2018-10-02 12:18:11,957 INFO L226 Difference]: Without dead ends: 16 [2018-10-02 12:18:11,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime [2018-10-02 12:18:11,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-02 12:18:11,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-02 12:18:11,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-02 12:18:11,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-02 12:18:11,962 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-02 12:18:11,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:11,962 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-02 12:18:11,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-02 12:18:11,962 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-02 12:18:11,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 12:18:11,963 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:11,963 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-10-02 12:18:11,963 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:11,963 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:11,963 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-10-02 12:18:11,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:11,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:11,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:11,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:11,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:11,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:12,227 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:12,227 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:12,228 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:12,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:18:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:12,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:12,589 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:12,609 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:12,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-10-02 12:18:12,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-02 12:18:12,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-02 12:18:12,609 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:12,610 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 30 states. [2018-10-02 12:18:14,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:14,179 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-02 12:18:14,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 12:18:14,179 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 15 [2018-10-02 12:18:14,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:14,180 INFO L225 Difference]: With dead ends: 18 [2018-10-02 12:18:14,180 INFO L226 Difference]: Without dead ends: 17 [2018-10-02 12:18:14,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime [2018-10-02 12:18:14,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-02 12:18:14,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-02 12:18:14,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-02 12:18:14,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-02 12:18:14,185 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-02 12:18:14,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:14,186 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-02 12:18:14,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-02 12:18:14,186 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-02 12:18:14,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-02 12:18:14,186 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:14,186 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-10-02 12:18:14,187 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:14,187 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:14,187 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-10-02 12:18:14,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:14,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:14,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:14,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:18:14,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:14,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:14,811 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:14,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:14,811 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:14,819 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:18:14,833 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:18:14,833 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:14,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:15,136 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:15,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:15,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-10-02 12:18:15,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-02 12:18:15,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-02 12:18:15,158 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:15,158 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 32 states. [2018-10-02 12:18:16,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:16,390 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-02 12:18:16,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 12:18:16,391 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 16 [2018-10-02 12:18:16,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:16,391 INFO L225 Difference]: With dead ends: 19 [2018-10-02 12:18:16,392 INFO L226 Difference]: Without dead ends: 18 [2018-10-02 12:18:16,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime [2018-10-02 12:18:16,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-02 12:18:16,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-02 12:18:16,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-02 12:18:16,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-02 12:18:16,397 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-02 12:18:16,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:16,397 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-02 12:18:16,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-02 12:18:16,398 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-02 12:18:16,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 12:18:16,398 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:16,398 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-10-02 12:18:16,399 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:16,399 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:16,399 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-10-02 12:18:16,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:16,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:16,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:16,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:16,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:16,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:17,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:17,115 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:17,131 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:18:17,255 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 12:18:17,255 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:17,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:17,871 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:17,892 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:17,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-10-02 12:18:17,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-02 12:18:17,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-02 12:18:17,893 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:17,893 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 34 states. [2018-10-02 12:18:19,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:19,625 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-02 12:18:19,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-02 12:18:19,626 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 17 [2018-10-02 12:18:19,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:19,627 INFO L225 Difference]: With dead ends: 20 [2018-10-02 12:18:19,627 INFO L226 Difference]: Without dead ends: 19 [2018-10-02 12:18:19,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 1.0s impTime [2018-10-02 12:18:19,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-02 12:18:19,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-02 12:18:19,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-02 12:18:19,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-02 12:18:19,632 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-02 12:18:19,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:19,632 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-02 12:18:19,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-02 12:18:19,632 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-02 12:18:19,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-02 12:18:19,633 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:19,633 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-10-02 12:18:19,633 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:19,633 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:19,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-10-02 12:18:19,634 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:19,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:19,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:19,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:19,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:19,945 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:19,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:19,945 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:19,952 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:18:19,964 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:18:19,964 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:19,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:20,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:20,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-10-02 12:18:20,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-02 12:18:20,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-02 12:18:20,285 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:20,285 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 36 states. [2018-10-02 12:18:21,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:21,838 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-02 12:18:21,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 12:18:21,839 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 18 [2018-10-02 12:18:21,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:21,840 INFO L225 Difference]: With dead ends: 21 [2018-10-02 12:18:21,840 INFO L226 Difference]: Without dead ends: 20 [2018-10-02 12:18:21,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.4s impTime [2018-10-02 12:18:21,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-02 12:18:21,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-02 12:18:21,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-02 12:18:21,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-02 12:18:21,844 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-02 12:18:21,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:21,845 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-02 12:18:21,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-02 12:18:21,845 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-02 12:18:21,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 12:18:21,845 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:21,846 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-10-02 12:18:21,846 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:21,846 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:21,846 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-10-02 12:18:21,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:21,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:21,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:21,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:21,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:21,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:23,154 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:23,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:23,154 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:23,163 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:18:23,177 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-02 12:18:23,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:23,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:23,501 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:23,521 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:23,521 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-10-02 12:18:23,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 12:18:23,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 12:18:23,522 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:23,522 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 38 states. [2018-10-02 12:18:25,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:25,254 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-02 12:18:25,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-02 12:18:25,254 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 19 [2018-10-02 12:18:25,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:25,255 INFO L225 Difference]: With dead ends: 22 [2018-10-02 12:18:25,255 INFO L226 Difference]: Without dead ends: 21 [2018-10-02 12:18:25,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.2s impTime [2018-10-02 12:18:25,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-02 12:18:25,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-02 12:18:25,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-02 12:18:25,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-02 12:18:25,262 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-02 12:18:25,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:25,262 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-02 12:18:25,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 12:18:25,262 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-02 12:18:25,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-02 12:18:25,262 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:25,263 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-10-02 12:18:25,263 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:25,263 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:25,263 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-10-02 12:18:25,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:25,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:25,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:25,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:25,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:25,788 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:25,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:25,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:25,798 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:18:25,815 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-02 12:18:25,815 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:25,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:26,218 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:26,240 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:26,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-10-02 12:18:26,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-02 12:18:26,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-02 12:18:26,241 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:26,241 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 40 states. [2018-10-02 12:18:28,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:28,795 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-02 12:18:28,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-02 12:18:28,796 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 20 [2018-10-02 12:18:28,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:28,797 INFO L225 Difference]: With dead ends: 23 [2018-10-02 12:18:28,797 INFO L226 Difference]: Without dead ends: 22 [2018-10-02 12:18:28,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime [2018-10-02 12:18:28,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-02 12:18:28,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-02 12:18:28,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 12:18:28,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-02 12:18:28,801 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-02 12:18:28,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:28,801 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-02 12:18:28,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-02 12:18:28,802 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-02 12:18:28,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-02 12:18:28,802 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:28,802 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-10-02 12:18:28,803 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:28,803 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:28,803 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-10-02 12:18:28,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:28,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:28,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:28,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:28,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:28,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:29,255 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:29,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:29,255 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:29,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:18:29,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:29,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:29,668 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:29,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:29,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-10-02 12:18:29,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-02 12:18:29,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-02 12:18:29,698 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:29,699 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 42 states. [2018-10-02 12:18:31,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:31,736 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-02 12:18:31,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-02 12:18:31,736 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 21 [2018-10-02 12:18:31,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:31,737 INFO L225 Difference]: With dead ends: 24 [2018-10-02 12:18:31,737 INFO L226 Difference]: Without dead ends: 23 [2018-10-02 12:18:31,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.6s impTime [2018-10-02 12:18:31,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-02 12:18:31,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-02 12:18:31,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-02 12:18:31,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-02 12:18:31,742 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-02 12:18:31,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:31,742 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-02 12:18:31,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-02 12:18:31,743 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-02 12:18:31,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-02 12:18:31,743 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:31,743 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-10-02 12:18:31,744 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:31,744 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:31,744 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-10-02 12:18:31,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:31,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:31,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:31,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:18:31,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:31,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:32,838 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:32,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:32,838 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:32,854 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:18:32,874 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:18:32,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:32,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:33,554 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:33,575 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:33,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-10-02 12:18:33,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-02 12:18:33,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-02 12:18:33,575 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:33,575 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 44 states. [2018-10-02 12:18:36,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:36,266 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-02 12:18:36,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-02 12:18:36,266 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 22 [2018-10-02 12:18:36,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:36,267 INFO L225 Difference]: With dead ends: 25 [2018-10-02 12:18:36,267 INFO L226 Difference]: Without dead ends: 24 [2018-10-02 12:18:36,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.3s impTime [2018-10-02 12:18:36,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-02 12:18:36,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-02 12:18:36,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 12:18:36,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-02 12:18:36,272 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-02 12:18:36,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:36,272 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-02 12:18:36,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-02 12:18:36,272 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-02 12:18:36,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-02 12:18:36,273 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:36,273 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-10-02 12:18:36,274 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:36,274 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:36,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-10-02 12:18:36,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:36,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:36,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:36,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:36,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:36,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:36,830 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:36,830 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:36,839 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:18:36,860 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-02 12:18:36,860 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:36,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:37,388 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:37,408 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:37,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-10-02 12:18:37,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-02 12:18:37,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-02 12:18:37,409 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:37,409 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 46 states. [2018-10-02 12:18:40,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:40,675 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-02 12:18:40,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-02 12:18:40,678 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 23 [2018-10-02 12:18:40,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:40,679 INFO L225 Difference]: With dead ends: 26 [2018-10-02 12:18:40,679 INFO L226 Difference]: Without dead ends: 25 [2018-10-02 12:18:40,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.8s impTime [2018-10-02 12:18:40,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-02 12:18:40,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-02 12:18:40,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-02 12:18:40,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-02 12:18:40,684 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-02 12:18:40,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:40,685 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-02 12:18:40,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-02 12:18:40,685 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-02 12:18:40,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-02 12:18:40,686 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:40,686 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-10-02 12:18:40,686 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:40,686 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:40,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-10-02 12:18:40,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:40,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:40,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:40,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:40,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:40,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:41,229 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:41,229 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:41,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:41,238 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:18:41,253 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:18:41,254 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:41,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:41,823 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:41,843 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:41,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-10-02 12:18:41,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-02 12:18:41,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-02 12:18:41,844 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:41,845 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 48 states. [2018-10-02 12:18:45,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:45,261 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-02 12:18:45,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-02 12:18:45,261 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 24 [2018-10-02 12:18:45,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:45,262 INFO L225 Difference]: With dead ends: 27 [2018-10-02 12:18:45,262 INFO L226 Difference]: Without dead ends: 26 [2018-10-02 12:18:45,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.8s impTime [2018-10-02 12:18:45,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-02 12:18:45,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-02 12:18:45,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 12:18:45,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-02 12:18:45,267 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-02 12:18:45,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:45,267 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-02 12:18:45,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-02 12:18:45,267 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-02 12:18:45,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-02 12:18:45,268 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:45,268 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-10-02 12:18:45,268 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:45,268 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:45,269 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-10-02 12:18:45,269 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:45,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:45,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:45,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:45,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:45,957 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:45,957 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:45,958 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:45,965 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:18:45,982 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-02 12:18:45,982 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:45,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:46,511 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:46,531 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:46,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-10-02 12:18:46,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-02 12:18:46,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-02 12:18:46,532 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:46,532 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 50 states. [2018-10-02 12:18:49,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:49,800 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-02 12:18:49,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-02 12:18:49,800 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 25 [2018-10-02 12:18:49,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:49,801 INFO L225 Difference]: With dead ends: 28 [2018-10-02 12:18:49,801 INFO L226 Difference]: Without dead ends: 27 [2018-10-02 12:18:49,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.9s impTime [2018-10-02 12:18:49,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-02 12:18:49,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-02 12:18:49,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-02 12:18:49,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-02 12:18:49,805 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-02 12:18:49,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:49,805 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-02 12:18:49,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-02 12:18:49,805 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-02 12:18:49,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-02 12:18:49,806 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:49,806 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-10-02 12:18:49,806 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:49,806 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:49,807 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-10-02 12:18:49,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:49,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:49,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:49,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:49,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:49,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:50,372 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:50,372 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:50,372 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:50,379 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:18:50,397 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-02 12:18:50,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:18:50,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:51,011 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:51,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:51,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-10-02 12:18:51,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-02 12:18:51,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-02 12:18:51,033 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:51,033 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 52 states. [2018-10-02 12:18:55,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:18:55,341 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-02 12:18:55,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-02 12:18:55,342 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 26 [2018-10-02 12:18:55,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:18:55,342 INFO L225 Difference]: With dead ends: 29 [2018-10-02 12:18:55,343 INFO L226 Difference]: Without dead ends: 28 [2018-10-02 12:18:55,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.9s impTime [2018-10-02 12:18:55,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-02 12:18:55,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-02 12:18:55,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 12:18:55,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-02 12:18:55,348 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-02 12:18:55,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:18:55,348 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-02 12:18:55,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-02 12:18:55,349 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-02 12:18:55,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-02 12:18:55,349 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:18:55,349 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-10-02 12:18:55,349 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:18:55,350 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:18:55,350 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-10-02 12:18:55,350 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:18:55,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:18:55,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:55,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:18:55,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:18:55,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:56,096 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:56,096 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:18:56,097 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:18:56,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:18:56,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:18:56,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:18:56,791 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:18:56,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:18:56,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-10-02 12:18:56,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-02 12:18:56,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-02 12:18:56,815 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:18:56,816 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 54 states. [2018-10-02 12:19:01,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:01,490 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-02 12:19:01,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-02 12:19:01,491 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 27 [2018-10-02 12:19:01,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:01,491 INFO L225 Difference]: With dead ends: 30 [2018-10-02 12:19:01,491 INFO L226 Difference]: Without dead ends: 29 [2018-10-02 12:19:01,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.1s impTime [2018-10-02 12:19:01,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-02 12:19:01,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-02 12:19:01,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-02 12:19:01,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-02 12:19:01,497 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-02 12:19:01,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:01,497 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-02 12:19:01,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-02 12:19:01,497 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-02 12:19:01,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-02 12:19:01,498 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:01,498 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-10-02 12:19:01,498 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:01,498 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:01,498 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-10-02 12:19:01,499 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:01,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:01,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:01,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:19:01,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:01,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:02,115 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:02,116 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:02,116 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:02,125 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:19:02,141 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:19:02,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:02,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:02,938 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:02,959 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:02,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-10-02 12:19:02,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-02 12:19:02,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-02 12:19:02,960 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:02,960 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 56 states. [2018-10-02 12:19:08,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:08,489 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-02 12:19:08,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-02 12:19:08,489 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 28 [2018-10-02 12:19:08,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:08,490 INFO L225 Difference]: With dead ends: 31 [2018-10-02 12:19:08,490 INFO L226 Difference]: Without dead ends: 30 [2018-10-02 12:19:08,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.2s impTime [2018-10-02 12:19:08,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-02 12:19:08,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-02 12:19:08,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 12:19:08,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-02 12:19:08,495 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-02 12:19:08,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:08,496 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-02 12:19:08,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-02 12:19:08,496 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-02 12:19:08,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-02 12:19:08,496 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:08,497 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-10-02 12:19:08,497 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:08,497 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:08,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-10-02 12:19:08,497 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:08,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:08,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:08,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:08,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:10,379 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:10,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:10,379 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:10,387 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:19:10,412 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-02 12:19:10,412 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:10,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:11,136 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:11,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:11,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-10-02 12:19:11,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-02 12:19:11,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-02 12:19:11,157 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:11,158 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 58 states. [2018-10-02 12:19:15,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:15,477 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-02 12:19:15,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-02 12:19:15,477 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 29 [2018-10-02 12:19:15,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:15,478 INFO L225 Difference]: With dead ends: 32 [2018-10-02 12:19:15,478 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 12:19:15,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.1s impTime [2018-10-02 12:19:15,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 12:19:15,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-02 12:19:15,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-02 12:19:15,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-02 12:19:15,483 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-02 12:19:15,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:15,484 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-02 12:19:15,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-02 12:19:15,484 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-02 12:19:15,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-02 12:19:15,484 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:15,484 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-10-02 12:19:15,484 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:15,485 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:15,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-10-02 12:19:15,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:15,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:15,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:15,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:15,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:16,251 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:16,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:16,251 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:16,260 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:19:16,277 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:19:16,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:16,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:17,063 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:17,083 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:17,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-10-02 12:19:17,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-02 12:19:17,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-02 12:19:17,084 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:17,084 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 60 states. [2018-10-02 12:19:21,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:21,659 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-02 12:19:21,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-02 12:19:21,660 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 30 [2018-10-02 12:19:21,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:21,660 INFO L225 Difference]: With dead ends: 33 [2018-10-02 12:19:21,660 INFO L226 Difference]: Without dead ends: 32 [2018-10-02 12:19:21,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.2s impTime [2018-10-02 12:19:21,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-02 12:19:21,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-02 12:19:21,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 12:19:21,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-02 12:19:21,666 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-02 12:19:21,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:21,666 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-02 12:19:21,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-02 12:19:21,666 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-02 12:19:21,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-02 12:19:21,667 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:21,667 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-10-02 12:19:21,667 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:21,667 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:21,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-10-02 12:19:21,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:21,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:21,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:21,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:21,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:21,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:22,573 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:22,574 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:22,574 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:22,588 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:19:22,613 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-02 12:19:22,613 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:22,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:24,103 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:24,103 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-10-02 12:19:24,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-02 12:19:24,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-02 12:19:24,104 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:24,104 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 62 states. [2018-10-02 12:19:30,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:30,494 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-02 12:19:30,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-02 12:19:30,494 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 31 [2018-10-02 12:19:30,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:30,495 INFO L225 Difference]: With dead ends: 34 [2018-10-02 12:19:30,495 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 12:19:30,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 1.9s impTime [2018-10-02 12:19:30,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 12:19:30,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-02 12:19:30,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-02 12:19:30,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-02 12:19:30,500 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-02 12:19:30,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:30,501 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-02 12:19:30,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-02 12:19:30,501 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-02 12:19:30,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-02 12:19:30,501 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:30,502 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-10-02 12:19:30,502 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:30,502 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:30,502 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-10-02 12:19:30,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:30,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:30,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:30,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:30,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:30,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:31,405 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:31,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:31,405 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:31,414 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:19:31,472 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-02 12:19:31,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:31,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:32,318 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:32,340 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:32,340 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-10-02 12:19:32,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-02 12:19:32,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-02 12:19:32,341 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:32,341 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 64 states. [2018-10-02 12:19:37,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:37,220 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-02 12:19:37,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-02 12:19:37,220 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 32 [2018-10-02 12:19:37,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:37,221 INFO L225 Difference]: With dead ends: 35 [2018-10-02 12:19:37,221 INFO L226 Difference]: Without dead ends: 34 [2018-10-02 12:19:37,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.3s impTime [2018-10-02 12:19:37,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-02 12:19:37,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-02 12:19:37,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 12:19:37,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-02 12:19:37,226 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-02 12:19:37,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:37,226 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-02 12:19:37,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-02 12:19:37,226 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-02 12:19:37,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-02 12:19:37,227 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:37,227 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-10-02 12:19:37,227 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:37,227 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:37,227 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-10-02 12:19:37,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:37,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:37,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:37,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:37,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:38,270 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:38,270 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:38,270 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:38,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:19:38,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:38,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:39,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:39,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-10-02 12:19:39,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-02 12:19:39,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-02 12:19:39,238 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:39,239 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 66 states. [2018-10-02 12:19:46,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:46,242 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-02 12:19:46,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-02 12:19:46,243 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 33 [2018-10-02 12:19:46,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:46,244 INFO L225 Difference]: With dead ends: 36 [2018-10-02 12:19:46,244 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 12:19:46,244 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.6s impTime [2018-10-02 12:19:46,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 12:19:46,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-02 12:19:46,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-02 12:19:46,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-02 12:19:46,249 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-02 12:19:46,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:46,249 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-02 12:19:46,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-02 12:19:46,249 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-02 12:19:46,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-02 12:19:46,250 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:46,250 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-10-02 12:19:46,250 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:46,250 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:46,250 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-10-02 12:19:46,250 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:46,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:46,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:46,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:19:46,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:47,402 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:47,402 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:47,403 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:47,410 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:19:47,439 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:19:47,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:47,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:48,347 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:48,367 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:48,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-10-02 12:19:48,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-02 12:19:48,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-02 12:19:48,368 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:48,368 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 68 states. [2018-10-02 12:19:53,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:19:53,897 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-02 12:19:53,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 12:19:53,897 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 34 [2018-10-02 12:19:53,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:19:53,898 INFO L225 Difference]: With dead ends: 37 [2018-10-02 12:19:53,898 INFO L226 Difference]: Without dead ends: 36 [2018-10-02 12:19:53,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.7s impTime [2018-10-02 12:19:53,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-02 12:19:53,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-02 12:19:53,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-02 12:19:53,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-02 12:19:53,903 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-02 12:19:53,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:19:53,904 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-02 12:19:53,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-02 12:19:53,904 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-02 12:19:53,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-02 12:19:53,904 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:19:53,904 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-10-02 12:19:53,905 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:19:53,905 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:19:53,905 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-10-02 12:19:53,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:19:53,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:19:53,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:53,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:19:53,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:19:53,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:19:55,548 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:55,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:19:55,549 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:19:55,556 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:19:55,586 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-02 12:19:55,586 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:19:55,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:19:56,798 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:19:56,819 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:19:56,819 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-10-02 12:19:56,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-02 12:19:56,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-02 12:19:56,820 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:19:56,820 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 70 states. [2018-10-02 12:20:05,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:05,756 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-02 12:20:05,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-02 12:20:05,756 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 35 [2018-10-02 12:20:05,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:05,757 INFO L225 Difference]: With dead ends: 38 [2018-10-02 12:20:05,757 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 12:20:05,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.4s impTime [2018-10-02 12:20:05,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 12:20:05,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-02 12:20:05,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-02 12:20:05,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-02 12:20:05,761 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-02 12:20:05,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:05,761 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-02 12:20:05,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-02 12:20:05,762 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-02 12:20:05,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-02 12:20:05,762 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:05,762 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-10-02 12:20:05,762 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:05,762 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:05,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-10-02 12:20:05,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:05,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:05,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:05,763 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:20:05,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:05,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:07,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:07,204 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:20:07,212 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:20:07,234 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:20:07,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:20:07,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:08,452 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:08,472 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:08,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-10-02 12:20:08,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-02 12:20:08,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-02 12:20:08,473 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:08,473 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 72 states. [2018-10-02 12:20:16,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:16,356 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-02 12:20:16,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-02 12:20:16,356 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 36 [2018-10-02 12:20:16,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:16,357 INFO L225 Difference]: With dead ends: 39 [2018-10-02 12:20:16,357 INFO L226 Difference]: Without dead ends: 38 [2018-10-02 12:20:16,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.2s impTime [2018-10-02 12:20:16,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-02 12:20:16,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-02 12:20:16,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-02 12:20:16,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-02 12:20:16,361 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-02 12:20:16,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:16,361 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-02 12:20:16,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-02 12:20:16,361 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-02 12:20:16,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-02 12:20:16,362 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:16,362 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-10-02 12:20:16,362 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:16,362 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:16,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-10-02 12:20:16,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:16,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:16,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:16,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:20:16,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:16,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:17,935 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:17,935 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:17,935 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:20:17,946 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:20:17,977 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-02 12:20:17,977 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:20:17,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:19,080 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:19,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:19,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-10-02 12:20:19,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-02 12:20:19,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-02 12:20:19,101 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:19,101 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 74 states. [2018-10-02 12:20:26,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:26,629 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-02 12:20:26,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-02 12:20:26,630 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 37 [2018-10-02 12:20:26,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:26,630 INFO L225 Difference]: With dead ends: 40 [2018-10-02 12:20:26,631 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 12:20:26,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.2s impTime [2018-10-02 12:20:26,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 12:20:26,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-02 12:20:26,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-02 12:20:26,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-02 12:20:26,635 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-02 12:20:26,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:26,635 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-02 12:20:26,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-02 12:20:26,636 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-02 12:20:26,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-02 12:20:26,636 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:26,636 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-10-02 12:20:26,636 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:26,637 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:26,637 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-10-02 12:20:26,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:26,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:26,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:26,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:20:26,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:27,781 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:27,781 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:27,781 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:20:27,790 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:20:27,824 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-02 12:20:27,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:20:27,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:28,986 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:29,008 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:29,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-10-02 12:20:29,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-02 12:20:29,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-02 12:20:29,009 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:29,009 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 76 states. [2018-10-02 12:20:36,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:36,450 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-02 12:20:36,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-02 12:20:36,451 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 38 [2018-10-02 12:20:36,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:36,451 INFO L225 Difference]: With dead ends: 41 [2018-10-02 12:20:36,452 INFO L226 Difference]: Without dead ends: 40 [2018-10-02 12:20:36,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.9s impTime [2018-10-02 12:20:36,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-02 12:20:36,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-02 12:20:36,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-02 12:20:36,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-02 12:20:36,457 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-02 12:20:36,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:36,457 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-02 12:20:36,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-02 12:20:36,458 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-02 12:20:36,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-02 12:20:36,458 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:36,458 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-10-02 12:20:36,458 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:36,459 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:36,459 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-10-02 12:20:36,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:36,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:36,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:36,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:20:36,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:37,634 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:37,634 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:20:37,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:20:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:37,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:38,865 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:38,866 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-10-02 12:20:38,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-02 12:20:38,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-02 12:20:38,866 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:38,866 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 78 states. [2018-10-02 12:20:46,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:46,346 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-02 12:20:46,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-02 12:20:46,347 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 39 [2018-10-02 12:20:46,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:46,347 INFO L225 Difference]: With dead ends: 42 [2018-10-02 12:20:46,347 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 12:20:46,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 2.0s impTime [2018-10-02 12:20:46,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 12:20:46,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-02 12:20:46,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-02 12:20:46,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-02 12:20:46,350 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-02 12:20:46,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:46,350 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-02 12:20:46,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-02 12:20:46,350 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-02 12:20:46,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-02 12:20:46,350 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:46,351 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-10-02 12:20:46,351 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:46,351 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:46,351 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-10-02 12:20:46,351 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:46,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:46,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:46,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:20:46,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:46,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:20:47,749 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:47,750 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:20:47,750 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:20:47,757 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:20:47,782 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:20:47,782 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:20:47,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:20:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:20:49,046 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:20:49,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-10-02 12:20:49,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-02 12:20:49,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-02 12:20:49,047 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:20:49,047 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 80 states. [2018-10-02 12:20:57,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:20:57,193 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-02 12:20:57,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-02 12:20:57,194 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 40 [2018-10-02 12:20:57,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:20:57,195 INFO L225 Difference]: With dead ends: 43 [2018-10-02 12:20:57,195 INFO L226 Difference]: Without dead ends: 42 [2018-10-02 12:20:57,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.2s impTime [2018-10-02 12:20:57,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-02 12:20:57,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-02 12:20:57,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-02 12:20:57,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-02 12:20:57,199 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-02 12:20:57,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:20:57,199 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-02 12:20:57,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-02 12:20:57,200 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-02 12:20:57,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-02 12:20:57,200 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:20:57,200 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-10-02 12:20:57,200 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:20:57,200 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:20:57,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-10-02 12:20:57,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:20:57,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:20:57,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:57,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:20:57,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:20:57,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:00,236 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:00,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:00,236 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:21:00,244 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:21:00,276 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-02 12:21:00,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:00,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:01,842 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:01,862 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:01,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-10-02 12:21:01,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-02 12:21:01,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-02 12:21:01,863 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:01,863 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 82 states. [2018-10-02 12:21:11,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:11,079 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-02 12:21:11,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-02 12:21:11,080 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 41 [2018-10-02 12:21:11,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:11,080 INFO L225 Difference]: With dead ends: 44 [2018-10-02 12:21:11,081 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 12:21:11,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s Time 3.9s impTime [2018-10-02 12:21:11,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 12:21:11,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-02 12:21:11,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-02 12:21:11,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-02 12:21:11,086 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-02 12:21:11,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:11,086 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-02 12:21:11,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-02 12:21:11,086 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-02 12:21:11,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-02 12:21:11,086 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:11,087 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-10-02 12:21:11,087 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:11,087 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:11,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-10-02 12:21:11,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:11,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:11,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:11,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:11,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:11,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:12,585 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:12,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:12,585 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:21:12,592 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:21:12,619 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:21:12,619 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:12,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:14,200 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:14,220 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:14,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-10-02 12:21:14,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-02 12:21:14,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-02 12:21:14,221 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:14,222 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 84 states. [2018-10-02 12:21:25,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:25,624 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-02 12:21:25,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-02 12:21:25,625 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 42 [2018-10-02 12:21:25,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:25,626 INFO L225 Difference]: With dead ends: 45 [2018-10-02 12:21:25,626 INFO L226 Difference]: Without dead ends: 44 [2018-10-02 12:21:25,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time 2.7s impTime [2018-10-02 12:21:25,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-02 12:21:25,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-02 12:21:25,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-02 12:21:25,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-02 12:21:25,629 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-02 12:21:25,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:25,630 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-02 12:21:25,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-02 12:21:25,630 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-02 12:21:25,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-02 12:21:25,630 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:25,631 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-10-02 12:21:25,631 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:25,631 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:25,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-10-02 12:21:25,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:25,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:25,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:25,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:25,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:25,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:27,161 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:27,161 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:27,162 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:21:27,169 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:21:27,213 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-02 12:21:27,213 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:27,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:28,911 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:28,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:28,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-10-02 12:21:28,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-02 12:21:28,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-02 12:21:28,932 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:28,932 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 86 states. [2018-10-02 12:21:39,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:39,088 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-02 12:21:39,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-02 12:21:39,089 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 43 [2018-10-02 12:21:39,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:39,089 INFO L225 Difference]: With dead ends: 46 [2018-10-02 12:21:39,089 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 12:21:39,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time 2.8s impTime [2018-10-02 12:21:39,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 12:21:39,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-02 12:21:39,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-02 12:21:39,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-02 12:21:39,094 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-02 12:21:39,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:39,094 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-02 12:21:39,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-02 12:21:39,094 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-02 12:21:39,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-02 12:21:39,094 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:39,094 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-10-02 12:21:39,095 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:39,095 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:39,095 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-10-02 12:21:39,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:39,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:39,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:39,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:39,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:40,506 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:40,507 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:40,507 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:21:40,514 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:21:40,548 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-02 12:21:40,548 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:21:40,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:42,146 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:42,167 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:42,167 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-10-02 12:21:42,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-02 12:21:42,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-02 12:21:42,168 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:42,168 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 88 states. [2018-10-02 12:21:52,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:21:52,279 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-02 12:21:52,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-02 12:21:52,280 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 44 [2018-10-02 12:21:52,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:21:52,280 INFO L225 Difference]: With dead ends: 47 [2018-10-02 12:21:52,280 INFO L226 Difference]: Without dead ends: 46 [2018-10-02 12:21:52,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time 2.7s impTime [2018-10-02 12:21:52,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-02 12:21:52,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-02 12:21:52,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-02 12:21:52,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-02 12:21:52,285 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-02 12:21:52,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:21:52,285 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-02 12:21:52,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-02 12:21:52,285 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-02 12:21:52,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-02 12:21:52,286 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:21:52,286 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-10-02 12:21:52,286 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:21:52,286 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:21:52,286 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-10-02 12:21:52,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:21:52,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:21:52,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:52,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:21:52,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:21:52,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:54,060 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:54,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:21:54,060 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:21:54,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:21:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:21:54,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:21:56,133 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:21:56,155 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:21:56,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-10-02 12:21:56,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-02 12:21:56,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-02 12:21:56,156 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:21:56,156 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 90 states. Received shutdown request... [2018-10-02 12:22:08,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-02 12:22:08,100 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-02 12:22:08,107 WARN L205 ceAbstractionStarter]: Timeout [2018-10-02 12:22:08,107 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 12:22:08 BoogieIcfgContainer [2018-10-02 12:22:08,107 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-02 12:22:08,108 INFO L168 Benchmark]: Toolchain (without parser) took 250153.53 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -71.8 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 320.0 MB). Peak memory consumption was 248.2 MB. Max. memory is 7.1 GB. [2018-10-02 12:22:08,110 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 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. [2018-10-02 12:22:08,110 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.69 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. [2018-10-02 12:22:08,111 INFO L168 Benchmark]: Boogie Preprocessor took 20.62 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. [2018-10-02 12:22:08,111 INFO L168 Benchmark]: RCFGBuilder took 275.25 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-02 12:22:08,112 INFO L168 Benchmark]: TraceAbstraction took 249809.80 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -71.8 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 298.9 MB). Peak memory consumption was 227.0 MB. Max. memory is 7.1 GB. [2018-10-02 12:22:08,116 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 0.23 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 41.69 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 20.62 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 275.25 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 249809.80 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -71.8 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 298.9 MB). Peak memory consumption was 227.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 18]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 18). Cancelled while BasicCegarLoop was constructing difference of abstraction (46states) and FLOYD_HOARE automaton (currently 39 states, 90 states before enhancement), while ReachableStatesComputation was computing reachable states (37 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. TIMEOUT Result, 249.7s OverallTime, 44 OverallIterations, 43 TraceHistogramMax, 180.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 88 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 46839 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 59.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1979 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1979 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=43, 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: 0.1s AutomataMinimizationTime, 43 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 65.7s InterpolantComputationTime, 2066 NumberOfCodeBlocks, 2066 NumberOfCodeBlocksAsserted, 346 NumberOfCheckSat, 1979 ConstructedInterpolants, 0 QuantifiedInterpolants, 763617 SizeOfPredicates, 0 NumberOfNonLiveVariables, 4085 ConjunctsInSsa, 3956 ConjunctsInUnsatCore, 87 InterpolantComputations, 1 PerfectInterpolantSequences, 0/28380 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/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-02_12-22-08-127.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-02_12-22-08-127.csv Completed graceful shutdown