java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c372c2b [2018-10-02 11:54:37,818 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 11:54:37,821 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 11:54:37,833 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-02 11:54:37,833 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-02 11:54:37,834 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-02 11:54:37,835 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-02 11:54:37,837 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-02 11:54:37,839 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-02 11:54:37,840 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-02 11:54:37,841 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-02 11:54:37,841 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-02 11:54:37,842 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-02 11:54:37,843 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-02 11:54:37,844 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-02 11:54:37,844 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-02 11:54:37,845 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-02 11:54:37,847 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-02 11:54:37,849 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-02 11:54:37,851 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-02 11:54:37,852 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-02 11:54:37,853 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-02 11:54:37,855 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-02 11:54:37,865 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-02 11:54:37,894 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 11:54:37,895 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 11:54:37,896 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 11:54:37,897 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 11:54:37,897 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 11:54:37,900 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 11:54:37,900 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 11:54:37,900 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 11:54:37,901 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 11:54:37,901 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 11:54:37,901 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 11:54:37,901 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 11:54:37,901 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 11:54:37,902 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 11:54:37,902 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 11:54:37,902 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 11:54:37,902 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 11:54:37,903 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 11:54:37,904 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 11:54:37,904 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 11:54:37,904 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 11:54:37,904 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 11:54:37,905 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:54:37,905 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 11:54:37,905 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 11:54:37,905 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 11:54:37,906 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 11:54:37,906 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 11:54:37,906 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 11:54:37,906 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 11:54:37,967 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 11:54:37,981 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 11:54:37,987 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 11:54:37,989 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 11:54:37,989 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 11:54:37,990 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl [2018-10-02 11:54:37,991 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl' [2018-10-02 11:54:38,045 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 11:54:38,050 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 11:54:38,051 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 11:54:38,051 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 11:54:38,051 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 11:54:38,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:54:38" (1/1) ... [2018-10-02 11:54:38,088 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:54:38" (1/1) ... [2018-10-02 11:54:38,092 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-02 11:54:38,093 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-02 11:54:38,093 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-02 11:54:38,095 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 11:54:38,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 11:54:38,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 11:54:38,096 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 11:54:38,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:54:38" (1/1) ... [2018-10-02 11:54:38,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:54:38" (1/1) ... [2018-10-02 11:54:38,108 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:54:38" (1/1) ... [2018-10-02 11:54:38,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:54:38" (1/1) ... [2018-10-02 11:54:38,110 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:54:38" (1/1) ... [2018-10-02 11:54:38,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:54:38" (1/1) ... [2018-10-02 11:54:38,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:54:38" (1/1) ... [2018-10-02 11:54:38,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 11:54:38,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 11:54:38,119 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 11:54:38,119 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 11:54:38,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:54:38" (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 11:54:38,182 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-02 11:54:38,182 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-02 11:54:38,183 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-02 11:54:38,332 INFO L337 CfgBuilder]: Using library mode [2018-10-02 11:54:38,332 INFO L202 PluginConnector]: Adding new model MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:54:38 BoogieIcfgContainer [2018-10-02 11:54:38,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 11:54:38,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 11:54:38,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 11:54:38,337 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 11:54:38,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:54:38" (1/2) ... [2018-10-02 11:54:38,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b7ff429 and model type MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:54:38, skipping insertion in model container [2018-10-02 11:54:38,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:54:38" (2/2) ... [2018-10-02 11:54:38,340 INFO L112 eAbstractionObserver]: Analyzing ICFG MonadicInvariant01.bpl [2018-10-02 11:54:38,350 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 11:54:38,358 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 11:54:38,409 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 11:54:38,410 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 11:54:38,410 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 11:54:38,410 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 11:54:38,410 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 11:54:38,411 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 11:54:38,411 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 11:54:38,411 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 11:54:38,411 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 11:54:38,426 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-02 11:54:38,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-02 11:54:38,433 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:38,434 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-02 11:54:38,435 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:38,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:38,441 INFO L82 PathProgramCache]: Analyzing trace with hash 29920, now seen corresponding path program 1 times [2018-10-02 11:54:38,443 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:38,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:38,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:38,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:38,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:38,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:38,576 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 11:54:38,579 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:54:38,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-02 11:54:38,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 11:54:38,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 11:54:38,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:54:38,597 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-10-02 11:54:38,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:38,654 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-02 11:54:38,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 11:54:38,656 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-02 11:54:38,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:38,668 INFO L225 Difference]: With dead ends: 11 [2018-10-02 11:54:38,668 INFO L226 Difference]: Without dead ends: 6 [2018-10-02 11:54:38,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:54:38,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-02 11:54:38,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-02 11:54:38,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-02 11:54:38,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-02 11:54:38,739 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2018-10-02 11:54:38,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:38,740 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-02 11:54:38,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 11:54:38,741 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-02 11:54:38,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-02 11:54:38,741 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:38,741 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-10-02 11:54:38,742 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:38,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:38,742 INFO L82 PathProgramCache]: Analyzing trace with hash 28754210, now seen corresponding path program 1 times [2018-10-02 11:54:38,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:38,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:38,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:38,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:38,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:38,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:38,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:38,881 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:38,881 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 11:54:38,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:38,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:38,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:39,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:39,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:39,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-10-02 11:54:39,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 11:54:39,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 11:54:39,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:54:39,025 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-10-02 11:54:39,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:39,065 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-02 11:54:39,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 11:54:39,065 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-10-02 11:54:39,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:39,066 INFO L225 Difference]: With dead ends: 9 [2018-10-02 11:54:39,066 INFO L226 Difference]: Without dead ends: 8 [2018-10-02 11:54:39,067 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:54:39,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-02 11:54:39,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-02 11:54:39,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-02 11:54:39,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-02 11:54:39,070 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2018-10-02 11:54:39,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:39,071 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-02 11:54:39,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 11:54:39,071 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-02 11:54:39,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-02 11:54:39,071 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:39,072 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1] [2018-10-02 11:54:39,072 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:39,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:39,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1862993124, now seen corresponding path program 2 times [2018-10-02 11:54:39,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:39,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:39,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:39,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:39,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:39,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:39,173 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 11:54:39,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:39,174 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 11:54:39,183 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:39,209 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:39,209 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:39,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:39,397 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 11:54:39,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:39,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-10-02 11:54:39,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:54:39,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:54:39,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:54:39,419 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-10-02 11:54:39,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:39,542 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-02 11:54:39,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 11:54:39,543 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-10-02 11:54:39,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:39,544 INFO L225 Difference]: With dead ends: 11 [2018-10-02 11:54:39,544 INFO L226 Difference]: Without dead ends: 10 [2018-10-02 11:54:39,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:54:39,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-02 11:54:39,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-02 11:54:39,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-02 11:54:39,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-02 11:54:39,550 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-10-02 11:54:39,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:39,551 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-02 11:54:39,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:54:39,551 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-02 11:54:39,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-02 11:54:39,552 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:39,552 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1] [2018-10-02 11:54:39,552 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:39,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:39,553 INFO L82 PathProgramCache]: Analyzing trace with hash -664969178, now seen corresponding path program 3 times [2018-10-02 11:54:39,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:39,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:39,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:39,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:39,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:39,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:39,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:39,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:39,759 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:39,774 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:39,787 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-02 11:54:39,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:39,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:39,913 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:39,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-10-02 11:54:39,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:39,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:39,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:39,915 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-10-02 11:54:39,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:39,967 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-02 11:54:39,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 11:54:39,967 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-10-02 11:54:39,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:39,968 INFO L225 Difference]: With dead ends: 13 [2018-10-02 11:54:39,968 INFO L226 Difference]: Without dead ends: 12 [2018-10-02 11:54:39,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:39,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-02 11:54:39,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-02 11:54:39,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-02 11:54:39,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-02 11:54:39,973 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-10-02 11:54:39,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:39,973 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-02 11:54:39,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:39,974 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-02 11:54:39,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-02 11:54:39,974 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:39,974 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2018-10-02 11:54:39,975 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:39,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:39,975 INFO L82 PathProgramCache]: Analyzing trace with hash 914748136, now seen corresponding path program 4 times [2018-10-02 11:54:39,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:39,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:39,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:39,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:39,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:39,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:40,141 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:40,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:40,142 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:40,154 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:40,163 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:40,164 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:40,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:40,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:40,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-10-02 11:54:40,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 11:54:40,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 11:54:40,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:54:40,324 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-10-02 11:54:40,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:40,396 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-02 11:54:40,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:54:40,396 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-10-02 11:54:40,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:40,397 INFO L225 Difference]: With dead ends: 15 [2018-10-02 11:54:40,397 INFO L226 Difference]: Without dead ends: 14 [2018-10-02 11:54:40,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:54:40,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-02 11:54:40,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-02 11:54:40,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-02 11:54:40,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-02 11:54:40,401 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-10-02 11:54:40,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:40,402 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-02 11:54:40,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 11:54:40,402 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-02 11:54:40,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:54:40,403 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:40,403 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1] [2018-10-02 11:54:40,403 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:40,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:40,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1395335894, now seen corresponding path program 5 times [2018-10-02 11:54:40,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:40,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:40,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:40,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:40,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:40,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:40,848 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:40,849 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:40,868 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:40,888 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-02 11:54:40,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:40,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:41,024 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:41,046 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:41,046 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-10-02 11:54:41,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 11:54:41,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 11:54:41,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:54:41,047 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-10-02 11:54:41,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:41,133 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-02 11:54:41,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:54:41,134 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-10-02 11:54:41,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:41,134 INFO L225 Difference]: With dead ends: 17 [2018-10-02 11:54:41,135 INFO L226 Difference]: Without dead ends: 16 [2018-10-02 11:54:41,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:54:41,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-02 11:54:41,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-02 11:54:41,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-02 11:54:41,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-02 11:54:41,139 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-10-02 11:54:41,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:41,140 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-02 11:54:41,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 11:54:41,140 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-02 11:54:41,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:41,141 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:41,141 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1] [2018-10-02 11:54:41,141 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:41,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:41,142 INFO L82 PathProgramCache]: Analyzing trace with hash -887996692, now seen corresponding path program 6 times [2018-10-02 11:54:41,142 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:41,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:41,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:41,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:41,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:41,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:41,268 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:41,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:41,269 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:41,277 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:41,286 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 11:54:41,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:41,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:41,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:41,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-10-02 11:54:41,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 11:54:41,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 11:54:41,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:54:41,462 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-10-02 11:54:41,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:41,517 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-02 11:54:41,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:41,518 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-10-02 11:54:41,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:41,519 INFO L225 Difference]: With dead ends: 19 [2018-10-02 11:54:41,519 INFO L226 Difference]: Without dead ends: 18 [2018-10-02 11:54:41,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:54:41,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-02 11:54:41,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-02 11:54:41,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-02 11:54:41,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-02 11:54:41,525 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-10-02 11:54:41,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:41,526 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-02 11:54:41,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 11:54:41,526 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-02 11:54:41,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:41,527 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:41,527 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1] [2018-10-02 11:54:41,527 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:41,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:41,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1333671982, now seen corresponding path program 7 times [2018-10-02 11:54:41,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:41,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:41,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:41,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:41,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:41,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:41,715 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:41,716 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:41,716 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:41,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:41,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:41,952 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:41,974 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:41,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-10-02 11:54:41,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 11:54:41,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 11:54:41,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:54:41,976 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-10-02 11:54:42,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:42,039 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-02 11:54:42,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:42,040 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-10-02 11:54:42,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:42,040 INFO L225 Difference]: With dead ends: 21 [2018-10-02 11:54:42,041 INFO L226 Difference]: Without dead ends: 20 [2018-10-02 11:54:42,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:54:42,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-02 11:54:42,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-02 11:54:42,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-02 11:54:42,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-02 11:54:42,046 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-10-02 11:54:42,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:42,046 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-02 11:54:42,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 11:54:42,046 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-02 11:54:42,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:54:42,047 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:42,047 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1] [2018-10-02 11:54:42,047 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:42,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:42,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1758521584, now seen corresponding path program 8 times [2018-10-02 11:54:42,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:42,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:42,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:42,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:42,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:42,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:42,269 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:42,278 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:42,285 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:42,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:42,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:42,461 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:42,482 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:42,483 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-10-02 11:54:42,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 11:54:42,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 11:54:42,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:54:42,484 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-10-02 11:54:42,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:42,561 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-02 11:54:42,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:54:42,562 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-10-02 11:54:42,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:42,563 INFO L225 Difference]: With dead ends: 23 [2018-10-02 11:54:42,563 INFO L226 Difference]: Without dead ends: 22 [2018-10-02 11:54:42,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:54:42,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-02 11:54:42,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-02 11:54:42,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:54:42,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-02 11:54:42,568 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-10-02 11:54:42,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:42,568 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-02 11:54:42,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 11:54:42,568 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-02 11:54:42,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-02 11:54:42,569 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:42,569 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1] [2018-10-02 11:54:42,569 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:42,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:42,569 INFO L82 PathProgramCache]: Analyzing trace with hash 2017095986, now seen corresponding path program 9 times [2018-10-02 11:54:42,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:42,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:42,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:42,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:42,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:42,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:42,740 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:42,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:42,741 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 11:54:42,750 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:42,804 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-02 11:54:42,804 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:42,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:43,021 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:43,041 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:43,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-10-02 11:54:43,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-02 11:54:43,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-02 11:54:43,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:54:43,043 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-10-02 11:54:43,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:43,314 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-02 11:54:43,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 11:54:43,314 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-10-02 11:54:43,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:43,315 INFO L225 Difference]: With dead ends: 25 [2018-10-02 11:54:43,315 INFO L226 Difference]: Without dead ends: 24 [2018-10-02 11:54:43,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:54:43,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-02 11:54:43,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-02 11:54:43,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:54:43,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-02 11:54:43,320 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-10-02 11:54:43,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:43,321 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-02 11:54:43,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-02 11:54:43,321 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-02 11:54:43,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-02 11:54:43,322 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:43,322 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1] [2018-10-02 11:54:43,323 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:43,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:43,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1398993140, now seen corresponding path program 10 times [2018-10-02 11:54:43,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:43,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:43,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:43,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:43,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:43,556 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:43,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:43,557 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:43,565 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:43,575 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:43,575 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:43,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:43,795 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:43,816 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:43,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-10-02 11:54:43,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-02 11:54:43,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-02 11:54:43,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:54:43,819 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-10-02 11:54:44,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:44,156 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-02 11:54:44,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 11:54:44,157 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-10-02 11:54:44,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:44,158 INFO L225 Difference]: With dead ends: 27 [2018-10-02 11:54:44,158 INFO L226 Difference]: Without dead ends: 26 [2018-10-02 11:54:44,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:54:44,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-02 11:54:44,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-02 11:54:44,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:44,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-02 11:54:44,165 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-10-02 11:54:44,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:44,166 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-02 11:54:44,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-02 11:54:44,166 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-02 11:54:44,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-02 11:54:44,167 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:44,167 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1] [2018-10-02 11:54:44,167 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:44,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:44,167 INFO L82 PathProgramCache]: Analyzing trace with hash 107644982, now seen corresponding path program 11 times [2018-10-02 11:54:44,168 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:44,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:44,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:44,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:44,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:44,332 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:44,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:44,332 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 11:54:44,339 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:44,363 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-02 11:54:44,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:44,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:44,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:44,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-10-02 11:54:44,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 11:54:44,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 11:54:44,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:54:44,963 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-10-02 11:54:45,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:45,045 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-02 11:54:45,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 11:54:45,045 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-10-02 11:54:45,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:45,046 INFO L225 Difference]: With dead ends: 29 [2018-10-02 11:54:45,046 INFO L226 Difference]: Without dead ends: 28 [2018-10-02 11:54:45,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:54:45,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-02 11:54:45,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-02 11:54:45,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:45,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-02 11:54:45,052 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-10-02 11:54:45,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:45,053 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-02 11:54:45,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 11:54:45,053 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-02 11:54:45,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-02 11:54:45,053 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:45,053 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1] [2018-10-02 11:54:45,054 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:45,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:45,054 INFO L82 PathProgramCache]: Analyzing trace with hash 367613688, now seen corresponding path program 12 times [2018-10-02 11:54:45,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:45,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:45,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:45,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:45,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:45,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:45,373 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:45,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:45,374 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 11:54:45,386 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:45,437 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-02 11:54:45,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:45,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:45,734 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:45,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:45,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-10-02 11:54:45,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-02 11:54:45,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-02 11:54:45,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:54:45,757 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-10-02 11:54:45,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:45,839 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-02 11:54:45,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 11:54:45,840 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-10-02 11:54:45,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:45,840 INFO L225 Difference]: With dead ends: 31 [2018-10-02 11:54:45,841 INFO L226 Difference]: Without dead ends: 30 [2018-10-02 11:54:45,842 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:54:45,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-02 11:54:45,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-02 11:54:45,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:45,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-02 11:54:45,847 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-10-02 11:54:45,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:45,847 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-02 11:54:45,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-02 11:54:45,847 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-02 11:54:45,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-02 11:54:45,848 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:45,848 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1] [2018-10-02 11:54:45,848 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:45,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:45,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1089436986, now seen corresponding path program 13 times [2018-10-02 11:54:45,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:45,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:45,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:45,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:45,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:46,037 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:46,038 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:46,038 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 11:54:46,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:46,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:46,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:46,399 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:46,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-10-02 11:54:46,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-02 11:54:46,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-02 11:54:46,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:54:46,400 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-10-02 11:54:46,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:46,479 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-02 11:54:46,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 11:54:46,480 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-10-02 11:54:46,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:46,480 INFO L225 Difference]: With dead ends: 33 [2018-10-02 11:54:46,480 INFO L226 Difference]: Without dead ends: 32 [2018-10-02 11:54:46,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:54:46,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-02 11:54:46,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-02 11:54:46,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:54:46,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-02 11:54:46,486 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2018-10-02 11:54:46,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:46,486 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-02 11:54:46,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-02 11:54:46,487 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-02 11:54:46,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-02 11:54:46,487 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:46,487 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1] [2018-10-02 11:54:46,488 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:46,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:46,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1023075588, now seen corresponding path program 14 times [2018-10-02 11:54:46,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:46,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:46,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:46,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:46,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:46,701 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 11:54:46,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:46,701 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 11:54:46,711 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:46,722 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:46,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:46,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:47,020 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 11:54:47,040 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:47,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-10-02 11:54:47,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-02 11:54:47,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-02 11:54:47,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:54:47,041 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-10-02 11:54:47,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:47,176 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-02 11:54:47,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 11:54:47,177 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-10-02 11:54:47,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:47,178 INFO L225 Difference]: With dead ends: 35 [2018-10-02 11:54:47,178 INFO L226 Difference]: Without dead ends: 34 [2018-10-02 11:54:47,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:54:47,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-02 11:54:47,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-02 11:54:47,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:54:47,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-02 11:54:47,185 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2018-10-02 11:54:47,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:47,185 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-02 11:54:47,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-02 11:54:47,185 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-02 11:54:47,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-02 11:54:47,186 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:47,186 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1] [2018-10-02 11:54:47,186 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:47,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:47,186 INFO L82 PathProgramCache]: Analyzing trace with hash 371871806, now seen corresponding path program 15 times [2018-10-02 11:54:47,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:47,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:47,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:47,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:47,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:47,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:47,446 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:47,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:47,446 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 11:54:47,456 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:47,653 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-02 11:54:47,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:47,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:48,024 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:48,045 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:48,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-10-02 11:54:48,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-02 11:54:48,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-02 11:54:48,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:54:48,046 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-10-02 11:54:48,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:48,168 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-02 11:54:48,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-02 11:54:48,168 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-10-02 11:54:48,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:48,169 INFO L225 Difference]: With dead ends: 37 [2018-10-02 11:54:48,170 INFO L226 Difference]: Without dead ends: 36 [2018-10-02 11:54:48,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:54:48,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-02 11:54:48,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-02 11:54:48,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-02 11:54:48,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-02 11:54:48,177 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2018-10-02 11:54:48,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:48,177 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-02 11:54:48,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-02 11:54:48,177 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-02 11:54:48,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-02 11:54:48,178 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:48,178 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1] [2018-10-02 11:54:48,178 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:48,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:48,179 INFO L82 PathProgramCache]: Analyzing trace with hash 886521088, now seen corresponding path program 16 times [2018-10-02 11:54:48,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:48,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:48,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:48,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:48,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:48,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:48,426 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:48,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:48,426 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 11:54:48,434 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:48,444 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:48,444 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:48,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:48,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:48,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-10-02 11:54:48,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-02 11:54:48,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-02 11:54:48,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:54:48,760 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-10-02 11:54:48,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:48,845 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-02 11:54:48,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 11:54:48,846 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-10-02 11:54:48,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:48,846 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:54:48,846 INFO L226 Difference]: Without dead ends: 38 [2018-10-02 11:54:48,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:54:48,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-02 11:54:48,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-02 11:54:48,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-02 11:54:48,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-02 11:54:48,853 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-10-02 11:54:48,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:48,853 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-02 11:54:48,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-02 11:54:48,853 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-02 11:54:48,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-02 11:54:48,854 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:48,854 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1] [2018-10-02 11:54:48,854 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:48,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:48,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1543242050, now seen corresponding path program 17 times [2018-10-02 11:54:48,855 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:48,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:48,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:48,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:48,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:48,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:49,210 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:49,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:49,211 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 11:54:49,218 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:49,235 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-02 11:54:49,235 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:49,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:49,861 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:49,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:49,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-10-02 11:54:49,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 11:54:49,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 11:54:49,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:54:49,883 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-10-02 11:54:50,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:50,118 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-02 11:54:50,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-02 11:54:50,119 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-10-02 11:54:50,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:50,120 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:54:50,120 INFO L226 Difference]: Without dead ends: 40 [2018-10-02 11:54:50,122 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:54:50,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-02 11:54:50,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-02 11:54:50,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-02 11:54:50,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-02 11:54:50,127 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-10-02 11:54:50,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:50,127 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-02 11:54:50,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 11:54:50,127 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-02 11:54:50,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-02 11:54:50,128 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:50,128 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1] [2018-10-02 11:54:50,129 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:50,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:50,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1291894020, now seen corresponding path program 18 times [2018-10-02 11:54:50,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:50,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:50,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:50,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:50,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:50,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:50,600 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:50,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:50,600 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:50,607 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:50,623 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-02 11:54:50,623 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:50,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:51,381 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:51,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:51,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-10-02 11:54:51,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-02 11:54:51,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-02 11:54:51,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:54:51,403 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-10-02 11:54:51,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:51,487 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-02 11:54:51,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-02 11:54:51,487 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-10-02 11:54:51,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:51,488 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:54:51,489 INFO L226 Difference]: Without dead ends: 42 [2018-10-02 11:54:51,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:54:51,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-02 11:54:51,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-02 11:54:51,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-02 11:54:51,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-02 11:54:51,493 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-10-02 11:54:51,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:51,494 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-02 11:54:51,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-02 11:54:51,494 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-02 11:54:51,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-02 11:54:51,495 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:51,495 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1] [2018-10-02 11:54:51,495 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:51,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:51,495 INFO L82 PathProgramCache]: Analyzing trace with hash 264605766, now seen corresponding path program 19 times [2018-10-02 11:54:51,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:51,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:51,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:51,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:51,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:51,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:51,803 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:51,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:51,804 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 11:54:51,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:51,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:52,593 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:52,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:52,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-10-02 11:54:52,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-02 11:54:52,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-02 11:54:52,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:54:52,615 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-10-02 11:54:52,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:52,765 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-02 11:54:52,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-02 11:54:52,766 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-10-02 11:54:52,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:52,766 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:54:52,767 INFO L226 Difference]: Without dead ends: 44 [2018-10-02 11:54:52,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:54:52,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-02 11:54:52,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-02 11:54:52,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-02 11:54:52,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-02 11:54:52,773 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-10-02 11:54:52,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:52,773 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-02 11:54:52,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-02 11:54:52,773 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-02 11:54:52,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-02 11:54:52,774 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:52,774 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1] [2018-10-02 11:54:52,774 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:52,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:52,774 INFO L82 PathProgramCache]: Analyzing trace with hash 883071752, now seen corresponding path program 20 times [2018-10-02 11:54:52,775 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:52,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:52,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:52,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:52,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:53,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:53,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:53,431 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:53,444 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:53,444 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:53,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:53,774 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:53,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:53,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-10-02 11:54:53,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-02 11:54:53,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-02 11:54:53,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:54:53,798 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-10-02 11:54:53,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:53,899 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-02 11:54:53,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-02 11:54:53,900 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-10-02 11:54:53,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:53,901 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:54:53,901 INFO L226 Difference]: Without dead ends: 46 [2018-10-02 11:54:53,902 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:54:53,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-02 11:54:53,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-02 11:54:53,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-02 11:54:53,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-02 11:54:53,907 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2018-10-02 11:54:53,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:53,908 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-02 11:54:53,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-02 11:54:53,908 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-02 11:54:53,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-02 11:54:53,909 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:53,909 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1] [2018-10-02 11:54:53,909 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:53,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:53,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1771569846, now seen corresponding path program 21 times [2018-10-02 11:54:53,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:53,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:53,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:53,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:53,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:53,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:55,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:55,048 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:55,055 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:55,074 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-02 11:54:55,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:55,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:55,436 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:55,456 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:55,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-10-02 11:54:55,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-02 11:54:55,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-02 11:54:55,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:54:55,458 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-10-02 11:54:55,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:55,607 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-02 11:54:55,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-02 11:54:55,610 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-10-02 11:54:55,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:55,611 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:54:55,611 INFO L226 Difference]: Without dead ends: 48 [2018-10-02 11:54:55,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:54:55,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-02 11:54:55,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-02 11:54:55,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-02 11:54:55,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-02 11:54:55,617 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2018-10-02 11:54:55,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:55,617 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-02 11:54:55,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-02 11:54:55,617 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-02 11:54:55,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-02 11:54:55,618 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:55,618 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1] [2018-10-02 11:54:55,618 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:55,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:55,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1671571700, now seen corresponding path program 22 times [2018-10-02 11:54:55,619 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:55,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:55,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:55,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:55,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:55,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:56,551 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:56,551 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:56,551 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 11:54:56,561 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:56,575 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:56,575 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:56,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:57,129 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:57,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:57,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-10-02 11:54:57,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-02 11:54:57,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-02 11:54:57,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:54:57,153 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-10-02 11:54:57,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:57,256 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-02 11:54:57,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-02 11:54:57,256 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-10-02 11:54:57,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:57,257 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:54:57,257 INFO L226 Difference]: Without dead ends: 50 [2018-10-02 11:54:57,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:54:57,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-02 11:54:57,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-02 11:54:57,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-02 11:54:57,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-02 11:54:57,264 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2018-10-02 11:54:57,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:57,264 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-02 11:54:57,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-02 11:54:57,265 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-02 11:54:57,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-02 11:54:57,266 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:57,266 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1] [2018-10-02 11:54:57,266 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:57,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:57,266 INFO L82 PathProgramCache]: Analyzing trace with hash -62633906, now seen corresponding path program 23 times [2018-10-02 11:54:57,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:57,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:57,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:57,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:57,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:57,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:58,040 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:58,040 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 11:54:58,048 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:58,073 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-02 11:54:58,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:58,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:58,547 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:58,567 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:58,568 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-10-02 11:54:58,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-02 11:54:58,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-02 11:54:58,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:54:58,569 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-10-02 11:54:58,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:58,704 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-02 11:54:58,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-02 11:54:58,704 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-10-02 11:54:58,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:58,705 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:54:58,705 INFO L226 Difference]: Without dead ends: 52 [2018-10-02 11:54:58,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:54:58,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-02 11:54:58,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-02 11:54:58,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-02 11:54:58,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-02 11:54:58,711 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2018-10-02 11:54:58,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:58,711 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-02 11:54:58,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-02 11:54:58,712 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-02 11:54:58,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-02 11:54:58,712 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:58,712 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1] [2018-10-02 11:54:58,713 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:58,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:58,713 INFO L82 PathProgramCache]: Analyzing trace with hash -61640432, now seen corresponding path program 24 times [2018-10-02 11:54:58,713 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:58,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:58,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:58,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:58,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:58,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:59,212 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:59,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:59,213 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 11:54:59,220 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:59,244 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-02 11:54:59,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:59,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:59,696 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:59,718 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:59,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-10-02 11:54:59,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-02 11:54:59,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-02 11:54:59,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:54:59,720 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-10-02 11:54:59,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:59,914 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-02 11:54:59,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-02 11:54:59,914 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-10-02 11:54:59,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:59,915 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:54:59,915 INFO L226 Difference]: Without dead ends: 54 [2018-10-02 11:54:59,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:54:59,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-02 11:54:59,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-02 11:54:59,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-02 11:54:59,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-02 11:54:59,919 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2018-10-02 11:54:59,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:59,919 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-02 11:54:59,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-02 11:54:59,919 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-02 11:54:59,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-02 11:54:59,920 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:59,920 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1] [2018-10-02 11:54:59,921 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:59,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:59,921 INFO L82 PathProgramCache]: Analyzing trace with hash 893088082, now seen corresponding path program 25 times [2018-10-02 11:54:59,921 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:59,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:59,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:59,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:59,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:59,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:00,351 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:00,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:00,352 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:55:00,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:00,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:00,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:00,849 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:00,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:00,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-10-02 11:55:00,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-02 11:55:00,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-02 11:55:00,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:55:00,872 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-10-02 11:55:01,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:01,001 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-02 11:55:01,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-02 11:55:01,002 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-10-02 11:55:01,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:01,003 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:55:01,003 INFO L226 Difference]: Without dead ends: 56 [2018-10-02 11:55:01,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:55:01,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-02 11:55:01,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-02 11:55:01,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-02 11:55:01,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-02 11:55:01,012 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2018-10-02 11:55:01,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:01,012 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-02 11:55:01,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-02 11:55:01,012 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-02 11:55:01,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-02 11:55:01,013 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:01,013 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1] [2018-10-02 11:55:01,013 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:01,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:01,014 INFO L82 PathProgramCache]: Analyzing trace with hash -735811308, now seen corresponding path program 26 times [2018-10-02 11:55:01,014 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:01,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:01,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:01,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:01,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:01,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:01,583 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:01,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:01,583 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 11:55:01,591 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:01,606 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:01,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:01,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:02,116 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:02,136 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:02,137 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-10-02 11:55:02,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-02 11:55:02,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-02 11:55:02,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:55:02,139 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-10-02 11:55:02,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:02,280 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-02 11:55:02,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-02 11:55:02,280 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-10-02 11:55:02,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:02,281 INFO L225 Difference]: With dead ends: 59 [2018-10-02 11:55:02,281 INFO L226 Difference]: Without dead ends: 58 [2018-10-02 11:55:02,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:55:02,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-02 11:55:02,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-02 11:55:02,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-02 11:55:02,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-02 11:55:02,287 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2018-10-02 11:55:02,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:02,287 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-02 11:55:02,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-02 11:55:02,288 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-02 11:55:02,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-02 11:55:02,288 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:02,288 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1] [2018-10-02 11:55:02,289 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:02,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:02,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1554937942, now seen corresponding path program 27 times [2018-10-02 11:55:02,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:02,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:02,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:02,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:02,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:02,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:02,803 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 11:55:02,811 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:55:02,836 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-02 11:55:02,836 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:02,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:03,324 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:03,345 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:03,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-10-02 11:55:03,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-02 11:55:03,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-02 11:55:03,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 11:55:03,348 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-10-02 11:55:03,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:03,457 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-02 11:55:03,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-02 11:55:03,457 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-10-02 11:55:03,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:03,458 INFO L225 Difference]: With dead ends: 61 [2018-10-02 11:55:03,458 INFO L226 Difference]: Without dead ends: 60 [2018-10-02 11:55:03,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 11:55:03,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-02 11:55:03,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-02 11:55:03,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-02 11:55:03,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-02 11:55:03,463 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2018-10-02 11:55:03,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:03,463 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-02 11:55:03,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-02 11:55:03,463 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-02 11:55:03,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-02 11:55:03,464 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:03,464 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1] [2018-10-02 11:55:03,464 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:03,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:03,464 INFO L82 PathProgramCache]: Analyzing trace with hash -353255656, now seen corresponding path program 28 times [2018-10-02 11:55:03,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:03,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:03,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:03,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:03,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:03,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:03,908 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:03,908 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 11:55:03,926 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:55:03,963 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:55:03,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:03,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:05,300 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:05,320 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:05,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-10-02 11:55:05,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-02 11:55:05,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-02 11:55:05,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-10-02 11:55:05,321 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-10-02 11:55:05,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:05,502 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-02 11:55:05,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-02 11:55:05,503 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-10-02 11:55:05,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:05,504 INFO L225 Difference]: With dead ends: 63 [2018-10-02 11:55:05,504 INFO L226 Difference]: Without dead ends: 62 [2018-10-02 11:55:05,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-10-02 11:55:05,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-02 11:55:05,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-02 11:55:05,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-02 11:55:05,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-02 11:55:05,509 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2018-10-02 11:55:05,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:05,509 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-02 11:55:05,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-02 11:55:05,509 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-02 11:55:05,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-02 11:55:05,510 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:05,510 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1] [2018-10-02 11:55:05,510 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:05,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:05,511 INFO L82 PathProgramCache]: Analyzing trace with hash -176267942, now seen corresponding path program 29 times [2018-10-02 11:55:05,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:05,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:05,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:05,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:05,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:05,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:05,996 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:05,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:05,997 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:55:06,004 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:55:06,030 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-02 11:55:06,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:06,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:06,619 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:06,640 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:06,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-10-02 11:55:06,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-02 11:55:06,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-02 11:55:06,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:55:06,641 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-10-02 11:55:06,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:06,797 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-02 11:55:06,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-02 11:55:06,798 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-10-02 11:55:06,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:06,799 INFO L225 Difference]: With dead ends: 65 [2018-10-02 11:55:06,799 INFO L226 Difference]: Without dead ends: 64 [2018-10-02 11:55:06,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:55:06,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-02 11:55:06,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-02 11:55:06,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-02 11:55:06,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-02 11:55:06,804 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2018-10-02 11:55:06,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:06,804 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-02 11:55:06,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-02 11:55:06,804 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-02 11:55:06,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-02 11:55:06,805 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:06,805 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1] [2018-10-02 11:55:06,805 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:06,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:06,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1889766628, now seen corresponding path program 30 times [2018-10-02 11:55:06,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:06,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:06,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:06,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:06,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:06,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:07,334 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:07,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:07,335 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 11:55:07,344 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:55:07,379 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-02 11:55:07,379 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:07,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:08,085 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:08,105 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:08,106 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-10-02 11:55:08,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-02 11:55:08,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-02 11:55:08,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-10-02 11:55:08,107 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-10-02 11:55:08,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:08,224 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-02 11:55:08,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-02 11:55:08,225 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-10-02 11:55:08,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:08,226 INFO L225 Difference]: With dead ends: 67 [2018-10-02 11:55:08,226 INFO L226 Difference]: Without dead ends: 66 [2018-10-02 11:55:08,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-10-02 11:55:08,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-02 11:55:08,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-02 11:55:08,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-02 11:55:08,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-02 11:55:08,231 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2018-10-02 11:55:08,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:08,231 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-02 11:55:08,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-02 11:55:08,231 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-02 11:55:08,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-02 11:55:08,231 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:08,231 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1] [2018-10-02 11:55:08,232 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:08,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:08,232 INFO L82 PathProgramCache]: Analyzing trace with hash 705437790, now seen corresponding path program 31 times [2018-10-02 11:55:08,232 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:08,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:08,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:08,233 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:08,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:08,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:08,812 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:08,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:08,812 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 11:55:08,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:08,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:08,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:09,474 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:09,494 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:09,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-10-02 11:55:09,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-02 11:55:09,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-02 11:55:09,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:55:09,496 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-10-02 11:55:09,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:09,679 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-02 11:55:09,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-02 11:55:09,679 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-10-02 11:55:09,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:09,680 INFO L225 Difference]: With dead ends: 69 [2018-10-02 11:55:09,680 INFO L226 Difference]: Without dead ends: 68 [2018-10-02 11:55:09,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:55:09,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-02 11:55:09,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-02 11:55:09,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-02 11:55:09,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-02 11:55:09,685 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2018-10-02 11:55:09,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:09,685 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-02 11:55:09,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-02 11:55:09,686 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-02 11:55:09,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-02 11:55:09,686 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:09,686 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1] [2018-10-02 11:55:09,687 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:09,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:09,687 INFO L82 PathProgramCache]: Analyzing trace with hash -679115488, now seen corresponding path program 32 times [2018-10-02 11:55:09,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:09,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:09,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:09,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:09,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:10,651 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:10,651 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 11:55:10,658 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:10,675 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:10,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:10,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:11,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:11,424 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:11,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-10-02 11:55:11,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-02 11:55:11,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-02 11:55:11,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-10-02 11:55:11,426 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-10-02 11:55:11,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:11,585 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-02 11:55:11,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 11:55:11,585 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-10-02 11:55:11,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:11,586 INFO L225 Difference]: With dead ends: 71 [2018-10-02 11:55:11,586 INFO L226 Difference]: Without dead ends: 70 [2018-10-02 11:55:11,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-10-02 11:55:11,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-02 11:55:11,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-02 11:55:11,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-02 11:55:11,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-02 11:55:11,591 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2018-10-02 11:55:11,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:11,591 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-02 11:55:11,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-02 11:55:11,592 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-02 11:55:11,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-02 11:55:11,592 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:11,592 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1] [2018-10-02 11:55:11,592 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:11,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:11,593 INFO L82 PathProgramCache]: Analyzing trace with hash 205046114, now seen corresponding path program 33 times [2018-10-02 11:55:11,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:11,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:11,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:11,594 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:11,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:11,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:12,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:12,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:12,250 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 11:55:12,257 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:55:12,290 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-02 11:55:12,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:12,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:13,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:13,150 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:13,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-10-02 11:55:13,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-02 11:55:13,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-02 11:55:13,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:55:13,152 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-10-02 11:55:13,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:13,347 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-02 11:55:13,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-02 11:55:13,348 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-10-02 11:55:13,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:13,349 INFO L225 Difference]: With dead ends: 73 [2018-10-02 11:55:13,349 INFO L226 Difference]: Without dead ends: 72 [2018-10-02 11:55:13,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:55:13,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-02 11:55:13,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-02 11:55:13,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-02 11:55:13,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-02 11:55:13,352 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2018-10-02 11:55:13,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:13,353 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-02 11:55:13,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-02 11:55:13,353 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-02 11:55:13,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-02 11:55:13,353 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:13,353 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1] [2018-10-02 11:55:13,353 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:13,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:13,354 INFO L82 PathProgramCache]: Analyzing trace with hash -519178972, now seen corresponding path program 34 times [2018-10-02 11:55:13,354 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:13,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:13,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:13,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:13,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:13,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:13,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:13,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:13,945 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:55:13,952 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:55:13,972 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:55:13,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:13,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:14,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:14,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:14,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-10-02 11:55:14,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-02 11:55:14,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-02 11:55:14,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-10-02 11:55:14,744 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-10-02 11:55:14,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:14,922 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-02 11:55:14,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-02 11:55:14,922 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-10-02 11:55:14,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:14,923 INFO L225 Difference]: With dead ends: 75 [2018-10-02 11:55:14,923 INFO L226 Difference]: Without dead ends: 74 [2018-10-02 11:55:14,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-10-02 11:55:14,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-02 11:55:14,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-02 11:55:14,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-02 11:55:14,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-02 11:55:14,928 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2018-10-02 11:55:14,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:14,929 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-02 11:55:14,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-02 11:55:14,929 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-02 11:55:14,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-02 11:55:14,929 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:14,930 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1] [2018-10-02 11:55:14,930 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:14,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:14,930 INFO L82 PathProgramCache]: Analyzing trace with hash -714784666, now seen corresponding path program 35 times [2018-10-02 11:55:14,930 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:14,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:14,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:14,931 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:14,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:15,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:15,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:15,901 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:55:15,908 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:55:15,940 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-02 11:55:15,940 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:15,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:16,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:16,805 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:16,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-10-02 11:55:16,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-02 11:55:16,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-02 11:55:16,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-10-02 11:55:16,807 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-10-02 11:55:17,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:17,124 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-02 11:55:17,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-02 11:55:17,125 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-10-02 11:55:17,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:17,126 INFO L225 Difference]: With dead ends: 77 [2018-10-02 11:55:17,126 INFO L226 Difference]: Without dead ends: 76 [2018-10-02 11:55:17,127 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2520 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-10-02 11:55:17,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-02 11:55:17,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-02 11:55:17,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-02 11:55:17,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-02 11:55:17,130 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2018-10-02 11:55:17,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:17,130 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-02 11:55:17,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-02 11:55:17,130 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-02 11:55:17,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-02 11:55:17,130 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:17,131 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1] [2018-10-02 11:55:17,131 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:17,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:17,131 INFO L82 PathProgramCache]: Analyzing trace with hash 286704424, now seen corresponding path program 36 times [2018-10-02 11:55:17,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:17,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:17,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:17,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:17,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:17,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:17,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:17,935 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:17,936 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 11:55:17,943 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:55:17,977 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-02 11:55:17,977 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:17,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:18,844 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:18,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-10-02 11:55:18,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-02 11:55:18,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-02 11:55:18,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-10-02 11:55:18,846 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-10-02 11:55:19,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:19,021 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-02 11:55:19,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-02 11:55:19,022 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-10-02 11:55:19,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:19,023 INFO L225 Difference]: With dead ends: 79 [2018-10-02 11:55:19,023 INFO L226 Difference]: Without dead ends: 78 [2018-10-02 11:55:19,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-10-02 11:55:19,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-02 11:55:19,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-02 11:55:19,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-02 11:55:19,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-02 11:55:19,027 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2018-10-02 11:55:19,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:19,027 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-02 11:55:19,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-02 11:55:19,028 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-02 11:55:19,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-02 11:55:19,028 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:19,028 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1] [2018-10-02 11:55:19,028 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:19,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:19,029 INFO L82 PathProgramCache]: Analyzing trace with hash 645045610, now seen corresponding path program 37 times [2018-10-02 11:55:19,029 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:19,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:19,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:19,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:19,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:19,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:19,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:19,912 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:19,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:19,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:21,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:21,097 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:21,097 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-10-02 11:55:21,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-02 11:55:21,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-02 11:55:21,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-10-02 11:55:21,098 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-10-02 11:55:21,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:21,267 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-02 11:55:21,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-02 11:55:21,268 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-10-02 11:55:21,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:21,269 INFO L225 Difference]: With dead ends: 81 [2018-10-02 11:55:21,269 INFO L226 Difference]: Without dead ends: 80 [2018-10-02 11:55:21,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2812 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-10-02 11:55:21,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-02 11:55:21,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-02 11:55:21,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-02 11:55:21,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-02 11:55:21,273 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2018-10-02 11:55:21,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:21,273 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-02 11:55:21,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-02 11:55:21,273 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-02 11:55:21,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-02 11:55:21,273 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:21,273 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1] [2018-10-02 11:55:21,274 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:21,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:21,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1413541676, now seen corresponding path program 38 times [2018-10-02 11:55:21,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:21,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:21,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:21,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:21,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:22,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:22,110 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:22,110 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 11:55:22,118 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:22,137 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:22,137 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:22,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:23,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:23,076 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:23,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-10-02 11:55:23,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-02 11:55:23,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-02 11:55:23,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-10-02 11:55:23,078 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-10-02 11:55:23,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:23,247 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-02 11:55:23,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-02 11:55:23,248 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-10-02 11:55:23,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:23,249 INFO L225 Difference]: With dead ends: 83 [2018-10-02 11:55:23,249 INFO L226 Difference]: Without dead ends: 82 [2018-10-02 11:55:23,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-10-02 11:55:23,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-02 11:55:23,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-02 11:55:23,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-02 11:55:23,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-02 11:55:23,253 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2018-10-02 11:55:23,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:23,253 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-02 11:55:23,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-02 11:55:23,253 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-02 11:55:23,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-02 11:55:23,254 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:23,254 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1] [2018-10-02 11:55:23,254 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:23,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:23,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1203886190, now seen corresponding path program 39 times [2018-10-02 11:55:23,254 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:23,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:23,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:23,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:23,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:23,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:24,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:24,285 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 11:55:24,293 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:55:24,331 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-02 11:55:24,331 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:24,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:25,306 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:25,306 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-10-02 11:55:25,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-02 11:55:25,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-02 11:55:25,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-10-02 11:55:25,307 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-10-02 11:55:25,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:25,561 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-02 11:55:25,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-02 11:55:25,561 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-10-02 11:55:25,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:25,562 INFO L225 Difference]: With dead ends: 85 [2018-10-02 11:55:25,562 INFO L226 Difference]: Without dead ends: 84 [2018-10-02 11:55:25,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-10-02 11:55:25,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-02 11:55:25,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-02 11:55:25,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-02 11:55:25,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-02 11:55:25,565 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2018-10-02 11:55:25,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:25,566 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-02 11:55:25,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-02 11:55:25,566 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-02 11:55:25,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-02 11:55:25,566 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:25,567 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1] [2018-10-02 11:55:25,567 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:25,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:25,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1588427056, now seen corresponding path program 40 times [2018-10-02 11:55:25,567 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:25,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:25,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:25,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:25,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:26,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:26,457 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:26,457 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 11:55:26,465 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:55:26,489 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:55:26,489 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:26,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:27,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:27,503 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:27,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-10-02 11:55:27,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-02 11:55:27,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-02 11:55:27,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-10-02 11:55:27,504 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-10-02 11:55:27,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:27,673 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-02 11:55:27,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-02 11:55:27,673 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-10-02 11:55:27,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:27,674 INFO L225 Difference]: With dead ends: 87 [2018-10-02 11:55:27,674 INFO L226 Difference]: Without dead ends: 86 [2018-10-02 11:55:27,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3280 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-10-02 11:55:27,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-02 11:55:27,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-02 11:55:27,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-02 11:55:27,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-02 11:55:27,680 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2018-10-02 11:55:27,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:27,680 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-02 11:55:27,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-02 11:55:27,680 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-02 11:55:27,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-02 11:55:27,681 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:27,681 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1] [2018-10-02 11:55:27,681 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:27,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:27,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1765011826, now seen corresponding path program 41 times [2018-10-02 11:55:27,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:27,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:27,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:27,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:27,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:27,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:28,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:28,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:28,708 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:55:28,716 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:55:28,756 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-02 11:55:28,756 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:28,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:29,932 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:29,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-10-02 11:55:29,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-02 11:55:29,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-02 11:55:29,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-10-02 11:55:29,934 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-10-02 11:55:30,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:30,122 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-02 11:55:30,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-02 11:55:30,123 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-10-02 11:55:30,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:30,124 INFO L225 Difference]: With dead ends: 89 [2018-10-02 11:55:30,124 INFO L226 Difference]: Without dead ends: 88 [2018-10-02 11:55:30,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3444 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-10-02 11:55:30,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-02 11:55:30,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-02 11:55:30,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-02 11:55:30,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-02 11:55:30,129 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2018-10-02 11:55:30,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:30,130 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-02 11:55:30,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-02 11:55:30,130 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-02 11:55:30,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-02 11:55:30,130 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:30,131 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1] [2018-10-02 11:55:30,131 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:30,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:30,131 INFO L82 PathProgramCache]: Analyzing trace with hash -335716044, now seen corresponding path program 42 times [2018-10-02 11:55:30,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:30,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:30,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:30,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:30,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:30,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:31,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:31,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:31,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:55:31,440 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:55:31,487 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-02 11:55:31,487 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:31,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:32,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:32,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-10-02 11:55:32,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-02 11:55:32,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-02 11:55:32,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-10-02 11:55:32,754 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-10-02 11:55:32,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:32,959 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-02 11:55:32,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-02 11:55:32,960 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-10-02 11:55:32,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:32,961 INFO L225 Difference]: With dead ends: 91 [2018-10-02 11:55:32,961 INFO L226 Difference]: Without dead ends: 90 [2018-10-02 11:55:32,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3612 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-10-02 11:55:32,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-02 11:55:32,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-02 11:55:32,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-02 11:55:32,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-02 11:55:32,965 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2018-10-02 11:55:32,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:32,966 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-02 11:55:32,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-02 11:55:32,966 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-02 11:55:32,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-02 11:55:32,966 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:32,966 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1] [2018-10-02 11:55:32,966 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:32,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:32,967 INFO L82 PathProgramCache]: Analyzing trace with hash -500569994, now seen corresponding path program 43 times [2018-10-02 11:55:32,967 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:32,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:32,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:32,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:32,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:32,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:33,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:33,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:33,844 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 11:55:33,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:33,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:33,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:34,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:34,986 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:34,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-10-02 11:55:34,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-02 11:55:34,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-02 11:55:34,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-10-02 11:55:34,988 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-10-02 11:55:35,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:35,176 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-02 11:55:35,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-02 11:55:35,177 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-10-02 11:55:35,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:35,178 INFO L225 Difference]: With dead ends: 93 [2018-10-02 11:55:35,178 INFO L226 Difference]: Without dead ends: 92 [2018-10-02 11:55:35,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3784 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-10-02 11:55:35,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-02 11:55:35,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-02 11:55:35,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-02 11:55:35,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-02 11:55:35,184 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2018-10-02 11:55:35,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:35,184 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-02 11:55:35,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-02 11:55:35,184 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-02 11:55:35,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-02 11:55:35,185 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:35,185 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1] [2018-10-02 11:55:35,185 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:35,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:35,186 INFO L82 PathProgramCache]: Analyzing trace with hash -11425992, now seen corresponding path program 44 times [2018-10-02 11:55:35,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:35,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:35,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:35,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:35,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:35,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:36,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:36,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:36,702 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:36,710 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:36,746 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:36,746 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:36,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:37,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:37,982 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:37,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-10-02 11:55:37,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-02 11:55:37,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-02 11:55:37,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-10-02 11:55:37,983 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-10-02 11:55:38,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:38,169 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-02 11:55:38,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-02 11:55:38,170 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-10-02 11:55:38,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:38,171 INFO L225 Difference]: With dead ends: 95 [2018-10-02 11:55:38,171 INFO L226 Difference]: Without dead ends: 94 [2018-10-02 11:55:38,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-10-02 11:55:38,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-02 11:55:38,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-02 11:55:38,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-02 11:55:38,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-02 11:55:38,176 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2018-10-02 11:55:38,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:38,177 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-02 11:55:38,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-02 11:55:38,177 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-02 11:55:38,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-02 11:55:38,177 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:38,178 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1] [2018-10-02 11:55:38,178 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:38,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:38,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1904524666, now seen corresponding path program 45 times [2018-10-02 11:55:38,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:38,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:38,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:38,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:38,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:38,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:40,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:40,163 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:40,163 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:40,172 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:55:40,281 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-02 11:55:40,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:40,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:41,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:41,932 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:41,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-10-02 11:55:41,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-02 11:55:41,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-02 11:55:41,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-10-02 11:55:41,933 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-10-02 11:55:42,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:42,142 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-02 11:55:42,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-02 11:55:42,142 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-10-02 11:55:42,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:42,143 INFO L225 Difference]: With dead ends: 97 [2018-10-02 11:55:42,144 INFO L226 Difference]: Without dead ends: 96 [2018-10-02 11:55:42,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4140 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-10-02 11:55:42,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-02 11:55:42,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-02 11:55:42,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-02 11:55:42,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-10-02 11:55:42,149 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2018-10-02 11:55:42,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:42,150 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-10-02 11:55:42,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-02 11:55:42,150 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-10-02 11:55:42,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-02 11:55:42,150 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:42,151 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1] [2018-10-02 11:55:42,151 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:42,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:42,151 INFO L82 PathProgramCache]: Analyzing trace with hash 592137020, now seen corresponding path program 46 times [2018-10-02 11:55:42,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:42,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:42,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:42,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:42,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:42,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:43,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:43,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:43,281 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:43,289 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:55:43,317 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:55:43,317 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:43,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:44,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:44,606 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:44,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-10-02 11:55:44,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-02 11:55:44,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-02 11:55:44,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-10-02 11:55:44,608 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-10-02 11:55:44,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:44,808 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-02 11:55:44,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-02 11:55:44,809 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-10-02 11:55:44,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:44,810 INFO L225 Difference]: With dead ends: 99 [2018-10-02 11:55:44,810 INFO L226 Difference]: Without dead ends: 98 [2018-10-02 11:55:44,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4324 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-10-02 11:55:44,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-02 11:55:44,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-02 11:55:44,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-02 11:55:44,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-02 11:55:44,815 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2018-10-02 11:55:44,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:44,815 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-02 11:55:44,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-02 11:55:44,816 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-02 11:55:44,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-02 11:55:44,816 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:44,816 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1] [2018-10-02 11:55:44,817 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:44,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:44,817 INFO L82 PathProgramCache]: Analyzing trace with hash 2107994238, now seen corresponding path program 47 times [2018-10-02 11:55:44,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:44,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:44,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:44,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:44,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:46,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:46,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:46,617 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:46,625 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:55:46,672 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-02 11:55:46,672 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:46,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:48,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:48,097 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:48,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-10-02 11:55:48,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-02 11:55:48,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-02 11:55:48,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-10-02 11:55:48,100 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-10-02 11:55:48,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:48,335 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-02 11:55:48,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-02 11:55:48,336 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-10-02 11:55:48,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:48,337 INFO L225 Difference]: With dead ends: 101 [2018-10-02 11:55:48,337 INFO L226 Difference]: Without dead ends: 100 [2018-10-02 11:55:48,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4512 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-10-02 11:55:48,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-02 11:55:48,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-02 11:55:48,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-02 11:55:48,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-02 11:55:48,342 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2018-10-02 11:55:48,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:48,342 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-02 11:55:48,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-02 11:55:48,343 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-02 11:55:48,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-02 11:55:48,343 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:48,343 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1] [2018-10-02 11:55:48,344 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:48,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:48,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1442099904, now seen corresponding path program 48 times [2018-10-02 11:55:48,344 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:48,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:48,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:48,345 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:48,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:48,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:49,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:49,636 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:49,636 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:49,644 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:55:49,696 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-02 11:55:49,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:49,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:51,302 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:51,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-10-02 11:55:51,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-02 11:55:51,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-02 11:55:51,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-10-02 11:55:51,304 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-10-02 11:55:51,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:51,562 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-02 11:55:51,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-02 11:55:51,563 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-10-02 11:55:51,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:51,564 INFO L225 Difference]: With dead ends: 103 [2018-10-02 11:55:51,564 INFO L226 Difference]: Without dead ends: 102 [2018-10-02 11:55:51,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4704 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-10-02 11:55:51,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-02 11:55:51,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-02 11:55:51,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-02 11:55:51,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-02 11:55:51,570 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2018-10-02 11:55:51,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:51,570 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-02 11:55:51,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-02 11:55:51,570 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-02 11:55:51,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-02 11:55:51,571 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:51,571 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1] [2018-10-02 11:55:51,571 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:51,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:51,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1416429954, now seen corresponding path program 49 times [2018-10-02 11:55:51,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:51,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:51,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:51,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:51,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:52,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:52,938 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:52,938 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:52,945 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:52,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:55,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:55,308 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:55,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-10-02 11:55:55,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-02 11:55:55,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-02 11:55:55,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-10-02 11:55:55,310 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-10-02 11:55:55,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:55,604 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-02 11:55:55,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-02 11:55:55,605 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-10-02 11:55:55,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:55,606 INFO L225 Difference]: With dead ends: 105 [2018-10-02 11:55:55,606 INFO L226 Difference]: Without dead ends: 104 [2018-10-02 11:55:55,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-10-02 11:55:55,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-02 11:55:55,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-02 11:55:55,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-02 11:55:55,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-02 11:55:55,612 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2018-10-02 11:55:55,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:55,613 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-02 11:55:55,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-02 11:55:55,613 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-02 11:55:55,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-02 11:55:55,613 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:55,614 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1] [2018-10-02 11:55:55,614 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:55,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:55,614 INFO L82 PathProgramCache]: Analyzing trace with hash -315445948, now seen corresponding path program 50 times [2018-10-02 11:55:55,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:55,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:55,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:55,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:55,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:57,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:57,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:57,255 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:57,264 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:57,312 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:57,313 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:57,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:58,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:58,853 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:58,853 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-10-02 11:55:58,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-02 11:55:58,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-02 11:55:58,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-10-02 11:55:58,855 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-10-02 11:56:00,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:00,069 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-02 11:56:00,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-02 11:56:00,069 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-10-02 11:56:00,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:00,071 INFO L225 Difference]: With dead ends: 107 [2018-10-02 11:56:00,071 INFO L226 Difference]: Without dead ends: 106 [2018-10-02 11:56:00,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5100 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-10-02 11:56:00,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-02 11:56:00,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-02 11:56:00,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-02 11:56:00,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-10-02 11:56:00,077 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2018-10-02 11:56:00,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:00,077 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-10-02 11:56:00,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-02 11:56:00,077 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-10-02 11:56:00,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-02 11:56:00,078 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:00,078 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1] [2018-10-02 11:56:00,078 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:00,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:00,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1799123078, now seen corresponding path program 51 times [2018-10-02 11:56:00,079 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:00,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:00,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:00,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:00,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:00,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:02,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:02,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:02,026 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:02,033 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:56:02,095 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-02 11:56:02,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:02,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:03,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:03,694 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:03,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-10-02 11:56:03,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-02 11:56:03,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-02 11:56:03,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-10-02 11:56:03,697 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-10-02 11:56:03,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:03,904 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-02 11:56:03,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-02 11:56:03,904 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-10-02 11:56:03,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:03,905 INFO L225 Difference]: With dead ends: 109 [2018-10-02 11:56:03,905 INFO L226 Difference]: Without dead ends: 108 [2018-10-02 11:56:03,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5304 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-10-02 11:56:03,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-02 11:56:03,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-02 11:56:03,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-02 11:56:03,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-02 11:56:03,911 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2018-10-02 11:56:03,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:03,911 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-02 11:56:03,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-02 11:56:03,912 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-02 11:56:03,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-02 11:56:03,912 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:03,912 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1] [2018-10-02 11:56:03,913 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:03,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:03,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1914541240, now seen corresponding path program 52 times [2018-10-02 11:56:03,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:03,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:03,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:03,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:03,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:05,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:05,233 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:05,248 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:56:05,292 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:56:05,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:05,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:07,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:07,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:07,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-10-02 11:56:07,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-02 11:56:07,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-02 11:56:07,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-10-02 11:56:07,412 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-10-02 11:56:07,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:07,624 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-02 11:56:07,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-02 11:56:07,624 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-10-02 11:56:07,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:07,625 INFO L225 Difference]: With dead ends: 111 [2018-10-02 11:56:07,625 INFO L226 Difference]: Without dead ends: 110 [2018-10-02 11:56:07,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5512 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-10-02 11:56:07,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-02 11:56:07,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-02 11:56:07,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-02 11:56:07,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-02 11:56:07,630 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2018-10-02 11:56:07,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:07,631 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-02 11:56:07,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-02 11:56:07,631 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-02 11:56:07,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-02 11:56:07,631 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:07,632 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1] [2018-10-02 11:56:07,632 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:07,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:07,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1628127862, now seen corresponding path program 53 times [2018-10-02 11:56:07,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:07,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:07,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:07,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:07,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:08,938 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:08,938 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:08,950 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:56:09,088 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-02 11:56:09,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:09,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:10,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:10,759 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:10,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-10-02 11:56:10,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-02 11:56:10,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-02 11:56:10,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-10-02 11:56:10,761 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-10-02 11:56:10,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:10,975 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-02 11:56:10,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-02 11:56:10,975 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-10-02 11:56:10,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:10,976 INFO L225 Difference]: With dead ends: 113 [2018-10-02 11:56:10,977 INFO L226 Difference]: Without dead ends: 112 [2018-10-02 11:56:10,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5724 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-10-02 11:56:10,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-02 11:56:10,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-02 11:56:10,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-02 11:56:10,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-02 11:56:10,981 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2018-10-02 11:56:10,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:10,981 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-02 11:56:10,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-02 11:56:10,982 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-02 11:56:10,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-02 11:56:10,982 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:10,982 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1] [2018-10-02 11:56:10,982 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:10,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:10,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1262778548, now seen corresponding path program 54 times [2018-10-02 11:56:10,983 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:10,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:10,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:10,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:10,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:12,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:12,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:12,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:12,873 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:56:12,928 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-02 11:56:12,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:12,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:14,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:14,770 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:14,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-10-02 11:56:14,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-02 11:56:14,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-02 11:56:14,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-10-02 11:56:14,772 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 112 states. [2018-10-02 11:56:15,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:15,283 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-02 11:56:15,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-02 11:56:15,283 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 111 [2018-10-02 11:56:15,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:15,285 INFO L225 Difference]: With dead ends: 115 [2018-10-02 11:56:15,285 INFO L226 Difference]: Without dead ends: 114 [2018-10-02 11:56:15,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5940 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-10-02 11:56:15,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-02 11:56:15,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-02 11:56:15,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-02 11:56:15,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-10-02 11:56:15,289 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2018-10-02 11:56:15,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:15,290 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-10-02 11:56:15,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-02 11:56:15,290 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-10-02 11:56:15,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-02 11:56:15,291 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:15,291 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1] [2018-10-02 11:56:15,291 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:15,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:15,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1945561230, now seen corresponding path program 55 times [2018-10-02 11:56:15,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:15,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:15,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:15,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:15,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:16,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:16,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:16,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:16,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:16,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:16,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:18,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:18,690 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:18,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-10-02 11:56:18,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-10-02 11:56:18,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-10-02 11:56:18,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-10-02 11:56:18,692 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 114 states. [2018-10-02 11:56:19,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:19,197 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-02 11:56:19,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-02 11:56:19,197 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 113 [2018-10-02 11:56:19,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:19,199 INFO L225 Difference]: With dead ends: 117 [2018-10-02 11:56:19,199 INFO L226 Difference]: Without dead ends: 116 [2018-10-02 11:56:19,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6160 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-10-02 11:56:19,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-02 11:56:19,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-10-02 11:56:19,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-02 11:56:19,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-10-02 11:56:19,205 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2018-10-02 11:56:19,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:19,205 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-10-02 11:56:19,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-10-02 11:56:19,205 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-10-02 11:56:19,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-02 11:56:19,206 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:19,206 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1] [2018-10-02 11:56:19,206 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:19,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:19,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1373569360, now seen corresponding path program 56 times [2018-10-02 11:56:19,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:19,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:19,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:19,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:19,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:19,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:20,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:20,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:20,708 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:20,719 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:56:20,748 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:56:20,748 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:20,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:22,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:22,836 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:22,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-10-02 11:56:22,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-10-02 11:56:22,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-10-02 11:56:22,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-10-02 11:56:22,838 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 116 states. [2018-10-02 11:56:23,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:23,077 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-10-02 11:56:23,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-02 11:56:23,077 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 115 [2018-10-02 11:56:23,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:23,078 INFO L225 Difference]: With dead ends: 119 [2018-10-02 11:56:23,079 INFO L226 Difference]: Without dead ends: 118 [2018-10-02 11:56:23,080 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6384 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-10-02 11:56:23,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-10-02 11:56:23,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-10-02 11:56:23,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-02 11:56:23,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-10-02 11:56:23,083 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2018-10-02 11:56:23,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:23,083 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-10-02 11:56:23,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-10-02 11:56:23,084 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-10-02 11:56:23,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-02 11:56:23,084 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:23,084 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1] [2018-10-02 11:56:23,084 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:23,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:23,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1445196178, now seen corresponding path program 57 times [2018-10-02 11:56:23,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:23,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:23,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:23,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:23,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:25,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:25,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:25,172 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:25,179 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:56:25,246 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-02 11:56:25,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:25,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:27,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:27,694 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:27,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-10-02 11:56:27,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-10-02 11:56:27,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-10-02 11:56:27,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-10-02 11:56:27,695 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 118 states. [2018-10-02 11:56:27,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:27,952 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-02 11:56:27,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-02 11:56:27,952 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 117 [2018-10-02 11:56:27,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:27,953 INFO L225 Difference]: With dead ends: 121 [2018-10-02 11:56:27,954 INFO L226 Difference]: Without dead ends: 120 [2018-10-02 11:56:27,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6612 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-10-02 11:56:27,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-02 11:56:27,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-10-02 11:56:27,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-02 11:56:27,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-10-02 11:56:27,960 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2018-10-02 11:56:27,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:27,960 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-10-02 11:56:27,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-10-02 11:56:27,960 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-10-02 11:56:27,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-02 11:56:27,961 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:27,961 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1] [2018-10-02 11:56:27,961 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:27,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:27,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1559091540, now seen corresponding path program 58 times [2018-10-02 11:56:27,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:27,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:27,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:27,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:27,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:29,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:29,459 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:29,459 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:29,468 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:56:29,504 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:56:29,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:29,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:31,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:31,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:31,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-10-02 11:56:31,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-10-02 11:56:31,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-10-02 11:56:31,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-10-02 11:56:31,780 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 120 states. [2018-10-02 11:56:32,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:32,141 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-10-02 11:56:32,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-02 11:56:32,142 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 119 [2018-10-02 11:56:32,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:32,142 INFO L225 Difference]: With dead ends: 123 [2018-10-02 11:56:32,143 INFO L226 Difference]: Without dead ends: 122 [2018-10-02 11:56:32,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6844 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-10-02 11:56:32,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-02 11:56:32,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-10-02 11:56:32,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-02 11:56:32,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-10-02 11:56:32,147 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2018-10-02 11:56:32,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:32,147 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-10-02 11:56:32,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-10-02 11:56:32,147 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-10-02 11:56:32,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-02 11:56:32,148 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:32,148 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1] [2018-10-02 11:56:32,148 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:32,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:32,148 INFO L82 PathProgramCache]: Analyzing trace with hash -656615274, now seen corresponding path program 59 times [2018-10-02 11:56:32,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:32,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:32,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:32,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:32,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:33,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:33,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:33,939 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:33,947 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:56:34,015 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-02 11:56:34,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:34,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:36,110 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:36,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 120 [2018-10-02 11:56:36,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-10-02 11:56:36,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-10-02 11:56:36,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-10-02 11:56:36,113 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 122 states. [2018-10-02 11:56:36,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:36,376 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-10-02 11:56:36,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-02 11:56:36,376 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 121 [2018-10-02 11:56:36,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:36,377 INFO L225 Difference]: With dead ends: 125 [2018-10-02 11:56:36,378 INFO L226 Difference]: Without dead ends: 124 [2018-10-02 11:56:36,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7080 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-10-02 11:56:36,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-02 11:56:36,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-10-02 11:56:36,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-02 11:56:36,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-10-02 11:56:36,384 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2018-10-02 11:56:36,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:36,384 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-10-02 11:56:36,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-10-02 11:56:36,384 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-10-02 11:56:36,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-02 11:56:36,385 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:36,385 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1] [2018-10-02 11:56:36,385 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:36,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:36,386 INFO L82 PathProgramCache]: Analyzing trace with hash 352915288, now seen corresponding path program 60 times [2018-10-02 11:56:36,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:36,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:36,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:36,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:36,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:38,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:38,847 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:38,858 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:56:38,920 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-02 11:56:38,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:38,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:41,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:41,042 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:41,042 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 122 [2018-10-02 11:56:41,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-10-02 11:56:41,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-10-02 11:56:41,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-10-02 11:56:41,044 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 124 states. [2018-10-02 11:56:41,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:41,306 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-02 11:56:41,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-02 11:56:41,307 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 123 [2018-10-02 11:56:41,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:41,308 INFO L225 Difference]: With dead ends: 127 [2018-10-02 11:56:41,308 INFO L226 Difference]: Without dead ends: 126 [2018-10-02 11:56:41,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7320 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-10-02 11:56:41,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-02 11:56:41,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-10-02 11:56:41,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-02 11:56:41,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-10-02 11:56:41,313 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2018-10-02 11:56:41,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:41,313 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-10-02 11:56:41,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-10-02 11:56:41,313 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-10-02 11:56:41,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-02 11:56:41,314 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:41,314 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1] [2018-10-02 11:56:41,314 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:41,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:41,314 INFO L82 PathProgramCache]: Analyzing trace with hash -150823526, now seen corresponding path program 61 times [2018-10-02 11:56:41,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:41,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:41,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:41,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:41,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:41,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:43,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:43,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:43,228 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:43,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:43,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:43,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:45,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:45,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:45,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-10-02 11:56:45,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-10-02 11:56:45,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-10-02 11:56:45,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-10-02 11:56:45,421 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 126 states. [2018-10-02 11:56:45,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:45,734 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-10-02 11:56:45,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-02 11:56:45,735 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 125 [2018-10-02 11:56:45,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:45,736 INFO L225 Difference]: With dead ends: 129 [2018-10-02 11:56:45,736 INFO L226 Difference]: Without dead ends: 128 [2018-10-02 11:56:45,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7564 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-10-02 11:56:45,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-02 11:56:45,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-10-02 11:56:45,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-02 11:56:45,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-10-02 11:56:45,741 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2018-10-02 11:56:45,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:45,741 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-10-02 11:56:45,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-10-02 11:56:45,741 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-10-02 11:56:45,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-02 11:56:45,742 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:45,742 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1] [2018-10-02 11:56:45,742 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:45,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:45,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1087480668, now seen corresponding path program 62 times [2018-10-02 11:56:45,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:45,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:45,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:45,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:45,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:45,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:47,849 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:47,849 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:47,858 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:56:47,892 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:56:47,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:47,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:50,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:50,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:50,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 126 [2018-10-02 11:56:50,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-10-02 11:56:50,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-10-02 11:56:50,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-10-02 11:56:50,058 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 128 states. [2018-10-02 11:56:50,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:50,313 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-10-02 11:56:50,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-02 11:56:50,314 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 127 [2018-10-02 11:56:50,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:50,314 INFO L225 Difference]: With dead ends: 131 [2018-10-02 11:56:50,314 INFO L226 Difference]: Without dead ends: 130 [2018-10-02 11:56:50,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7812 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-10-02 11:56:50,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-10-02 11:56:50,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-10-02 11:56:50,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-02 11:56:50,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-10-02 11:56:50,320 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2018-10-02 11:56:50,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:50,321 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-10-02 11:56:50,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-10-02 11:56:50,321 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-10-02 11:56:50,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-10-02 11:56:50,322 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:50,322 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1] [2018-10-02 11:56:50,322 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:50,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:50,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1391870110, now seen corresponding path program 63 times [2018-10-02 11:56:50,322 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:50,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:50,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:50,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:50,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:50,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:52,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:52,142 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:52,152 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:56:52,219 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-02 11:56:52,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:52,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:54,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:54,774 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:54,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 128 [2018-10-02 11:56:54,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-10-02 11:56:54,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-10-02 11:56:54,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-10-02 11:56:54,777 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 130 states. [2018-10-02 11:56:55,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:55,095 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-02 11:56:55,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-02 11:56:55,096 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 129 [2018-10-02 11:56:55,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:55,097 INFO L225 Difference]: With dead ends: 133 [2018-10-02 11:56:55,097 INFO L226 Difference]: Without dead ends: 132 [2018-10-02 11:56:55,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8064 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-10-02 11:56:55,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-10-02 11:56:55,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-10-02 11:56:55,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-10-02 11:56:55,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-10-02 11:56:55,103 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2018-10-02 11:56:55,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:55,103 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-10-02 11:56:55,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-10-02 11:56:55,103 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-10-02 11:56:55,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-10-02 11:56:55,104 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:55,104 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1] [2018-10-02 11:56:55,104 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:55,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:55,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1852347744, now seen corresponding path program 64 times [2018-10-02 11:56:55,104 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:55,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:55,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:55,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:55,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:56,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:56,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:56,940 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:56:56,952 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:56:56,988 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:56:56,988 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:56,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:59,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:59,672 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:59,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-10-02 11:56:59,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-10-02 11:56:59,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-10-02 11:56:59,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-10-02 11:56:59,674 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 132 states. [2018-10-02 11:56:59,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:59,940 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-10-02 11:56:59,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-02 11:56:59,941 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 131 [2018-10-02 11:56:59,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:59,942 INFO L225 Difference]: With dead ends: 135 [2018-10-02 11:56:59,942 INFO L226 Difference]: Without dead ends: 134 [2018-10-02 11:56:59,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8320 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-10-02 11:56:59,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-02 11:56:59,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-10-02 11:56:59,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-02 11:56:59,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-10-02 11:56:59,947 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2018-10-02 11:56:59,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:59,947 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-10-02 11:56:59,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-10-02 11:56:59,947 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-10-02 11:56:59,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-02 11:56:59,948 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:59,948 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1] [2018-10-02 11:56:59,948 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:59,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:59,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1989722530, now seen corresponding path program 65 times [2018-10-02 11:56:59,948 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:59,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:59,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:59,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:59,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:01,852 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:01,852 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:01,860 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:57:01,933 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-02 11:57:01,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:01,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:05,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:05,406 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:05,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 132 [2018-10-02 11:57:05,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-10-02 11:57:05,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-10-02 11:57:05,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-10-02 11:57:05,410 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 134 states. [2018-10-02 11:57:05,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:05,758 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-02 11:57:05,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-02 11:57:05,759 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 133 [2018-10-02 11:57:05,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:05,760 INFO L225 Difference]: With dead ends: 137 [2018-10-02 11:57:05,760 INFO L226 Difference]: Without dead ends: 136 [2018-10-02 11:57:05,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8580 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-10-02 11:57:05,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-10-02 11:57:05,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-10-02 11:57:05,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-02 11:57:05,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-10-02 11:57:05,766 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2018-10-02 11:57:05,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:05,767 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-10-02 11:57:05,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-10-02 11:57:05,767 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-10-02 11:57:05,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-02 11:57:05,768 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:05,768 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1] [2018-10-02 11:57:05,768 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:05,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:05,768 INFO L82 PathProgramCache]: Analyzing trace with hash 862905700, now seen corresponding path program 66 times [2018-10-02 11:57:05,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:05,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:05,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:05,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:05,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:07,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:07,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:07,671 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:07,679 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:57:07,792 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-02 11:57:07,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:07,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:10,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:10,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 134 [2018-10-02 11:57:10,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-10-02 11:57:10,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-10-02 11:57:10,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-10-02 11:57:10,476 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 136 states. [2018-10-02 11:57:10,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:10,792 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-02 11:57:10,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-02 11:57:10,792 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 135 [2018-10-02 11:57:10,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:10,793 INFO L225 Difference]: With dead ends: 139 [2018-10-02 11:57:10,794 INFO L226 Difference]: Without dead ends: 138 [2018-10-02 11:57:10,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8844 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-10-02 11:57:10,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-02 11:57:10,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-10-02 11:57:10,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-10-02 11:57:10,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-10-02 11:57:10,798 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2018-10-02 11:57:10,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:10,799 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-10-02 11:57:10,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-10-02 11:57:10,799 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-10-02 11:57:10,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-02 11:57:10,799 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:10,799 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1] [2018-10-02 11:57:10,800 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:10,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:10,800 INFO L82 PathProgramCache]: Analyzing trace with hash 323690662, now seen corresponding path program 67 times [2018-10-02 11:57:10,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:10,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:10,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:10,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:10,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:12,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:12,872 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:12,872 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:12,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:12,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:12,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:15,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:15,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-10-02 11:57:15,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-10-02 11:57:15,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-10-02 11:57:15,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-10-02 11:57:15,693 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 138 states. [2018-10-02 11:57:15,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:15,999 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-10-02 11:57:16,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-02 11:57:16,000 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 137 [2018-10-02 11:57:16,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:16,001 INFO L225 Difference]: With dead ends: 141 [2018-10-02 11:57:16,002 INFO L226 Difference]: Without dead ends: 140 [2018-10-02 11:57:16,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9112 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-10-02 11:57:16,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-10-02 11:57:16,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-10-02 11:57:16,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-02 11:57:16,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-10-02 11:57:16,008 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2018-10-02 11:57:16,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:16,008 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-10-02 11:57:16,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-10-02 11:57:16,008 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-10-02 11:57:16,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-02 11:57:16,009 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:16,009 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1] [2018-10-02 11:57:16,009 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:16,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:16,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1829081960, now seen corresponding path program 68 times [2018-10-02 11:57:16,010 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:16,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:16,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:16,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:16,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:18,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:18,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:18,366 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:18,372 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:57:18,409 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:57:18,409 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:18,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:20,934 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:20,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 138 [2018-10-02 11:57:20,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-10-02 11:57:20,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-10-02 11:57:20,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-10-02 11:57:20,936 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 140 states. [2018-10-02 11:57:21,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:21,257 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-10-02 11:57:21,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-02 11:57:21,258 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 139 [2018-10-02 11:57:21,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:21,259 INFO L225 Difference]: With dead ends: 143 [2018-10-02 11:57:21,259 INFO L226 Difference]: Without dead ends: 142 [2018-10-02 11:57:21,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9384 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-10-02 11:57:21,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-10-02 11:57:21,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-10-02 11:57:21,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-02 11:57:21,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-10-02 11:57:21,264 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2018-10-02 11:57:21,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:21,264 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-10-02 11:57:21,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-10-02 11:57:21,264 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-10-02 11:57:21,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-02 11:57:21,265 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:21,265 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1] [2018-10-02 11:57:21,266 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:21,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:21,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1106140586, now seen corresponding path program 69 times [2018-10-02 11:57:21,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:21,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:21,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:21,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:21,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:21,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:23,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:23,637 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:23,637 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:23,644 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:57:23,721 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-02 11:57:23,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:23,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:26,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:26,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:26,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 140 [2018-10-02 11:57:26,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-10-02 11:57:26,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-10-02 11:57:26,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-10-02 11:57:26,395 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 142 states. [2018-10-02 11:57:26,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:26,767 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-02 11:57:26,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-02 11:57:26,768 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 141 [2018-10-02 11:57:26,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:26,769 INFO L225 Difference]: With dead ends: 145 [2018-10-02 11:57:26,769 INFO L226 Difference]: Without dead ends: 144 [2018-10-02 11:57:26,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9660 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-10-02 11:57:26,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-02 11:57:26,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-10-02 11:57:26,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-10-02 11:57:26,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-10-02 11:57:26,774 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2018-10-02 11:57:26,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:26,774 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-10-02 11:57:26,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-10-02 11:57:26,774 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-10-02 11:57:26,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-02 11:57:26,775 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:26,775 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1] [2018-10-02 11:57:26,775 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:26,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:26,775 INFO L82 PathProgramCache]: Analyzing trace with hash 2144182124, now seen corresponding path program 70 times [2018-10-02 11:57:26,775 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:26,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:26,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:26,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:26,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:29,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:29,224 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:29,232 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:57:29,272 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:57:29,272 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:29,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:32,279 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:32,279 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 142 [2018-10-02 11:57:32,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-10-02 11:57:32,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-10-02 11:57:32,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-10-02 11:57:32,282 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 144 states. [2018-10-02 11:57:32,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:32,678 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-10-02 11:57:32,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-02 11:57:32,679 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 143 [2018-10-02 11:57:32,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:32,680 INFO L225 Difference]: With dead ends: 147 [2018-10-02 11:57:32,680 INFO L226 Difference]: Without dead ends: 146 [2018-10-02 11:57:32,682 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9940 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-10-02 11:57:32,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-02 11:57:32,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-10-02 11:57:32,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-10-02 11:57:32,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-10-02 11:57:32,686 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2018-10-02 11:57:32,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:32,686 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-10-02 11:57:32,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-10-02 11:57:32,686 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-10-02 11:57:32,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-02 11:57:32,687 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:32,687 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1] [2018-10-02 11:57:32,687 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:32,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:32,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1025279826, now seen corresponding path program 71 times [2018-10-02 11:57:32,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:32,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:32,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:32,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:32,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:32,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:35,152 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:35,152 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:35,160 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:57:35,342 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-02 11:57:35,343 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:35,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:38,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:38,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:38,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 144 [2018-10-02 11:57:38,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-10-02 11:57:38,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-10-02 11:57:38,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-10-02 11:57:38,464 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 146 states. [2018-10-02 11:57:38,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:38,910 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-10-02 11:57:38,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-02 11:57:38,911 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 145 [2018-10-02 11:57:38,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:38,912 INFO L225 Difference]: With dead ends: 149 [2018-10-02 11:57:38,912 INFO L226 Difference]: Without dead ends: 148 [2018-10-02 11:57:38,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10224 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-10-02 11:57:38,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-10-02 11:57:38,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-10-02 11:57:38,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-02 11:57:38,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-02 11:57:38,918 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2018-10-02 11:57:38,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:38,918 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-02 11:57:38,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-10-02 11:57:38,918 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-02 11:57:38,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-02 11:57:38,919 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:38,919 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1] [2018-10-02 11:57:38,919 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:38,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:38,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1746400912, now seen corresponding path program 72 times [2018-10-02 11:57:38,920 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:38,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:38,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:38,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:38,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:41,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:41,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:41,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:41,254 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:57:41,349 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-02 11:57:41,349 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:41,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:44,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:44,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 146 [2018-10-02 11:57:44,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-10-02 11:57:44,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-10-02 11:57:44,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-10-02 11:57:44,563 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 148 states. [2018-10-02 11:57:45,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:45,165 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-02 11:57:45,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-02 11:57:45,166 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 147 [2018-10-02 11:57:45,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:45,168 INFO L225 Difference]: With dead ends: 151 [2018-10-02 11:57:45,168 INFO L226 Difference]: Without dead ends: 150 [2018-10-02 11:57:45,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10512 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-10-02 11:57:45,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-02 11:57:45,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-10-02 11:57:45,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-02 11:57:45,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-10-02 11:57:45,174 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2018-10-02 11:57:45,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:45,174 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-10-02 11:57:45,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-10-02 11:57:45,174 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-10-02 11:57:45,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-02 11:57:45,175 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:45,175 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1] [2018-10-02 11:57:45,175 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:45,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:45,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1040937394, now seen corresponding path program 73 times [2018-10-02 11:57:45,176 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:45,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:45,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:45,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:45,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:47,513 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:47,513 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:47,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:47,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:47,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:50,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:50,891 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:50,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 148 [2018-10-02 11:57:50,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-10-02 11:57:50,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-10-02 11:57:50,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-10-02 11:57:50,894 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 150 states. [2018-10-02 11:57:51,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:51,270 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-10-02 11:57:51,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-02 11:57:51,270 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 149 [2018-10-02 11:57:51,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:51,271 INFO L225 Difference]: With dead ends: 153 [2018-10-02 11:57:51,271 INFO L226 Difference]: Without dead ends: 152 [2018-10-02 11:57:51,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10804 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-10-02 11:57:51,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-02 11:57:51,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-10-02 11:57:51,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-10-02 11:57:51,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-10-02 11:57:51,278 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2018-10-02 11:57:51,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:51,278 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-10-02 11:57:51,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-10-02 11:57:51,278 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-10-02 11:57:51,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-02 11:57:51,279 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:51,279 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1] [2018-10-02 11:57:51,280 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:51,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:51,280 INFO L82 PathProgramCache]: Analyzing trace with hash -386543244, now seen corresponding path program 74 times [2018-10-02 11:57:51,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:51,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:51,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:51,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:51,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:53,667 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:53,667 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:57:53,674 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:57:53,714 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:57:53,714 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:53,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:56,964 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:56,964 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 150 [2018-10-02 11:57:56,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-10-02 11:57:56,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-10-02 11:57:56,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-10-02 11:57:56,967 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 152 states. [2018-10-02 11:57:57,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:57,370 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-10-02 11:57:57,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-02 11:57:57,370 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 151 [2018-10-02 11:57:57,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:57,371 INFO L225 Difference]: With dead ends: 155 [2018-10-02 11:57:57,372 INFO L226 Difference]: Without dead ends: 154 [2018-10-02 11:57:57,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11100 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-10-02 11:57:57,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-10-02 11:57:57,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-10-02 11:57:57,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-02 11:57:57,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-10-02 11:57:57,377 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2018-10-02 11:57:57,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:57,377 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-10-02 11:57:57,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-10-02 11:57:57,377 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-10-02 11:57:57,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-02 11:57:57,378 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:57,378 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1] [2018-10-02 11:57:57,378 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:57,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:57,378 INFO L82 PathProgramCache]: Analyzing trace with hash -2100868938, now seen corresponding path program 75 times [2018-10-02 11:57:57,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:57,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:57,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:57,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:57,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:57,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:00,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:00,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:00,126 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:00,134 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:58:00,223 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-02 11:58:00,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:00,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:03,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:03,374 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:03,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 152 [2018-10-02 11:58:03,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-10-02 11:58:03,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-10-02 11:58:03,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-10-02 11:58:03,376 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 154 states. [2018-10-02 11:58:03,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:03,797 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-02 11:58:03,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-02 11:58:03,797 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 153 [2018-10-02 11:58:03,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:03,798 INFO L225 Difference]: With dead ends: 157 [2018-10-02 11:58:03,799 INFO L226 Difference]: Without dead ends: 156 [2018-10-02 11:58:03,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11400 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-10-02 11:58:03,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-02 11:58:03,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-10-02 11:58:03,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-10-02 11:58:03,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-10-02 11:58:03,803 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2018-10-02 11:58:03,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:03,804 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-10-02 11:58:03,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-10-02 11:58:03,804 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-10-02 11:58:03,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-02 11:58:03,804 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:03,804 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1] [2018-10-02 11:58:03,805 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:03,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:03,805 INFO L82 PathProgramCache]: Analyzing trace with hash -300419208, now seen corresponding path program 76 times [2018-10-02 11:58:03,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:03,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:03,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:03,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:03,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:03,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:06,653 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:06,653 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:06,661 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:58:06,706 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:58:06,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:06,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:10,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:10,150 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:10,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 154 [2018-10-02 11:58:10,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-10-02 11:58:10,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-10-02 11:58:10,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-10-02 11:58:10,153 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 156 states. [2018-10-02 11:58:10,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:10,516 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-10-02 11:58:10,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-02 11:58:10,516 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 155 [2018-10-02 11:58:10,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:10,518 INFO L225 Difference]: With dead ends: 159 [2018-10-02 11:58:10,518 INFO L226 Difference]: Without dead ends: 158 [2018-10-02 11:58:10,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11704 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-10-02 11:58:10,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-02 11:58:10,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-10-02 11:58:10,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-02 11:58:10,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-10-02 11:58:10,523 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2018-10-02 11:58:10,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:10,524 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-10-02 11:58:10,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-10-02 11:58:10,524 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-10-02 11:58:10,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-02 11:58:10,524 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:10,525 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1] [2018-10-02 11:58:10,525 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:10,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:10,525 INFO L82 PathProgramCache]: Analyzing trace with hash -940048966, now seen corresponding path program 77 times [2018-10-02 11:58:10,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:10,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:10,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:10,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:10,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:10,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:13,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:13,108 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:13,117 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:58:13,235 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-02 11:58:13,235 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:13,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:16,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:16,902 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:16,902 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 156 [2018-10-02 11:58:16,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-10-02 11:58:16,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-10-02 11:58:16,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-10-02 11:58:16,904 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 158 states. [2018-10-02 11:58:17,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:17,315 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-10-02 11:58:17,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-02 11:58:17,316 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 157 [2018-10-02 11:58:17,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:17,317 INFO L225 Difference]: With dead ends: 161 [2018-10-02 11:58:17,317 INFO L226 Difference]: Without dead ends: 160 [2018-10-02 11:58:17,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12012 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-10-02 11:58:17,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-02 11:58:17,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-10-02 11:58:17,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-02 11:58:17,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-10-02 11:58:17,324 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2018-10-02 11:58:17,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:17,325 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-10-02 11:58:17,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-10-02 11:58:17,325 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-10-02 11:58:17,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-02 11:58:17,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:17,326 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1] [2018-10-02 11:58:17,326 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:17,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:17,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1443923076, now seen corresponding path program 78 times [2018-10-02 11:58:17,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:17,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:17,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:17,327 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:17,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:17,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:20,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:20,261 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:20,267 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:58:20,359 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-02 11:58:20,359 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:20,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:23,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:23,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:23,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 158 [2018-10-02 11:58:23,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-10-02 11:58:23,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-10-02 11:58:23,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-10-02 11:58:23,590 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 160 states. [2018-10-02 11:58:23,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:23,977 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-10-02 11:58:23,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-02 11:58:23,977 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 159 [2018-10-02 11:58:23,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:23,978 INFO L225 Difference]: With dead ends: 163 [2018-10-02 11:58:23,978 INFO L226 Difference]: Without dead ends: 162 [2018-10-02 11:58:23,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12324 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-10-02 11:58:23,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-02 11:58:23,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-10-02 11:58:23,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-10-02 11:58:23,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-10-02 11:58:23,985 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2018-10-02 11:58:23,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:23,985 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-10-02 11:58:23,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-10-02 11:58:23,985 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-10-02 11:58:23,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-02 11:58:23,986 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:23,986 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1] [2018-10-02 11:58:23,987 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:23,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:23,987 INFO L82 PathProgramCache]: Analyzing trace with hash -335638338, now seen corresponding path program 79 times [2018-10-02 11:58:23,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:23,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:23,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:23,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:23,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:24,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:27,019 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:27,019 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:27,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:58:27,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:27,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:30,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:30,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:30,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 160 [2018-10-02 11:58:30,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-10-02 11:58:30,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-10-02 11:58:30,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-10-02 11:58:30,683 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 162 states. [2018-10-02 11:58:31,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:31,054 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-10-02 11:58:31,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-02 11:58:31,054 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 161 [2018-10-02 11:58:31,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:31,055 INFO L225 Difference]: With dead ends: 165 [2018-10-02 11:58:31,055 INFO L226 Difference]: Without dead ends: 164 [2018-10-02 11:58:31,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12640 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-10-02 11:58:31,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-10-02 11:58:31,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-10-02 11:58:31,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-02 11:58:31,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-10-02 11:58:31,062 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 161 [2018-10-02 11:58:31,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:31,062 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-10-02 11:58:31,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-10-02 11:58:31,062 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-10-02 11:58:31,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-02 11:58:31,063 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:31,063 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1] [2018-10-02 11:58:31,063 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:31,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:31,064 INFO L82 PathProgramCache]: Analyzing trace with hash -425894528, now seen corresponding path program 80 times [2018-10-02 11:58:31,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:31,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:31,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:31,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:58:31,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:31,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:33,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:33,834 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:58:33,841 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:58:33,893 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:58:33,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:33,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:37,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:37,540 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:37,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 162 [2018-10-02 11:58:37,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-10-02 11:58:37,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-10-02 11:58:37,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10126, Invalid=16606, Unknown=0, NotChecked=0, Total=26732 [2018-10-02 11:58:37,543 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 164 states. [2018-10-02 11:58:37,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:37,921 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-10-02 11:58:37,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-02 11:58:37,922 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 163 [2018-10-02 11:58:37,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:37,923 INFO L225 Difference]: With dead ends: 167 [2018-10-02 11:58:37,923 INFO L226 Difference]: Without dead ends: 166 [2018-10-02 11:58:37,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12960 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=10126, Invalid=16606, Unknown=0, NotChecked=0, Total=26732 [2018-10-02 11:58:37,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-10-02 11:58:37,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-10-02 11:58:37,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-10-02 11:58:37,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2018-10-02 11:58:37,927 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 163 [2018-10-02 11:58:37,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:37,928 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2018-10-02 11:58:37,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-10-02 11:58:37,928 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2018-10-02 11:58:37,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-02 11:58:37,928 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:37,929 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1] [2018-10-02 11:58:37,929 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:37,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:37,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1262747198, now seen corresponding path program 81 times [2018-10-02 11:58:37,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:37,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:37,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:37,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:37,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:37,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-02 11:58:38,135 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-02 11:58:38,139 WARN L205 ceAbstractionStarter]: Timeout [2018-10-02 11:58:38,139 INFO L202 PluginConnector]: Adding new model MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 11:58:38 BoogieIcfgContainer [2018-10-02 11:58:38,139 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-02 11:58:38,140 INFO L168 Benchmark]: Toolchain (without parser) took 240094.01 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -80.7 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 125.1 MB). Peak memory consumption was 44.4 MB. Max. memory is 7.1 GB. [2018-10-02 11:58:38,142 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.26 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 11:58:38,142 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.67 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 11:58:38,142 INFO L168 Benchmark]: Boogie Preprocessor took 22.14 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 11:58:38,143 INFO L168 Benchmark]: RCFGBuilder took 213.91 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-02 11:58:38,143 INFO L168 Benchmark]: TraceAbstraction took 239805.71 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -80.7 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 104.0 MB). Peak memory consumption was 23.2 MB. Max. memory is 7.1 GB. [2018-10-02 11:58:38,145 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 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.67 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.14 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 213.91 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 239805.71 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -80.7 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 104.0 MB). Peak memory consumption was 23.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 25]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 25). Cancelled while BasicCegarLoop was analyzing trace of length 166 with TraceHistMax 82, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 16 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 239.7s OverallTime, 82 OverallIterations, 82 TraceHistogramMax, 19.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 164 SDtfs, 0 SDslu, 1 SDs, 0 SdLazy, 13557 SolverSat, 260 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9961 GetRequests, 3320 SyntacticMatches, 0 SemanticMatches, 6641 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354240 ImplicationChecksByTransitivity, 206.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=166occurred in iteration=81, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 81 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 3.8s SatisfiabilityAnalysisTime, 211.5s InterpolantComputationTime, 13443 NumberOfCodeBlocks, 13443 NumberOfCodeBlocksAsserted, 1774 NumberOfCheckSat, 13282 ConstructedInterpolants, 0 QuantifiedInterpolants, 8661140 SizeOfPredicates, 0 NumberOfNonLiveVariables, 13600 ConjunctsInSsa, 3480 ConjunctsInUnsatCore, 161 InterpolantComputations, 1 PerfectInterpolantSequences, 0/354240 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/MonadicInvariant01.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-02_11-58-38-154.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/MonadicInvariant01.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-02_11-58-38-154.csv Completed graceful shutdown