java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f-m [2018-10-04 14:33:40,861 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 14:33:40,863 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 14:33:40,875 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 14:33:40,875 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 14:33:40,876 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 14:33:40,878 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 14:33:40,880 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 14:33:40,881 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 14:33:40,882 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 14:33:40,883 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 14:33:40,883 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 14:33:40,884 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 14:33:40,885 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 14:33:40,886 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 14:33:40,887 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 14:33:40,888 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 14:33:40,890 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 14:33:40,892 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 14:33:40,894 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 14:33:40,895 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 14:33:40,896 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 14:33:40,898 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-04 14:33:40,908 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-04 14:33:40,923 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 14:33:40,923 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 14:33:40,924 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 14:33:40,924 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 14:33:40,925 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 14:33:40,925 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 14:33:40,925 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 14:33:40,926 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 14:33:40,926 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 14:33:40,926 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 14:33:40,926 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 14:33:40,926 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 14:33:40,926 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 14:33:40,927 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 14:33:40,927 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 14:33:40,927 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 14:33:40,927 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 14:33:40,927 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 14:33:40,928 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 14:33:40,928 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 14:33:40,928 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 14:33:40,928 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 14:33:40,928 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 14:33:40,929 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 14:33:40,929 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 14:33:40,929 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 14:33:40,929 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 14:33:40,929 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 14:33:40,930 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 14:33:40,930 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 14:33:40,930 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 14:33:40,972 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 14:33:40,986 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 14:33:40,991 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 14:33:40,992 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 14:33:40,993 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 14:33:40,993 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl [2018-10-04 14:33:40,994 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl' [2018-10-04 14:33:41,047 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 14:33:41,049 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 14:33:41,050 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 14:33:41,050 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 14:33:41,050 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 14:33:41,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:33:41" (1/1) ... [2018-10-04 14:33:41,083 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:33:41" (1/1) ... [2018-10-04 14:33:41,088 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-04 14:33:41,089 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-04 14:33:41,089 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-04 14:33:41,091 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 14:33:41,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 14:33:41,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 14:33:41,092 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 14:33:41,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:33:41" (1/1) ... [2018-10-04 14:33:41,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:33:41" (1/1) ... [2018-10-04 14:33:41,105 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:33:41" (1/1) ... [2018-10-04 14:33:41,107 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:33:41" (1/1) ... [2018-10-04 14:33:41,109 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:33:41" (1/1) ... [2018-10-04 14:33:41,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:33:41" (1/1) ... [2018-10-04 14:33:41,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:33:41" (1/1) ... [2018-10-04 14:33:41,117 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 14:33:41,118 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 14:33:41,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 14:33:41,119 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 14:33:41,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:33:41" (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 [2018-10-04 14:33:41,196 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-04 14:33:41,196 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-04 14:33:41,196 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-04 14:33:41,369 INFO L338 CfgBuilder]: Using library mode [2018-10-04 14:33:41,370 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 02:33:41 BoogieIcfgContainer [2018-10-04 14:33:41,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 14:33:41,371 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 14:33:41,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 14:33:41,375 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 14:33:41,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:33:41" (1/2) ... [2018-10-04 14:33:41,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26395452 and model type DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 02:33:41, skipping insertion in model container [2018-10-04 14:33:41,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 02:33:41" (2/2) ... [2018-10-04 14:33:41,378 INFO L112 eAbstractionObserver]: Analyzing ICFG DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl [2018-10-04 14:33:41,390 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 14:33:41,398 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 14:33:41,443 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 14:33:41,444 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 14:33:41,444 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 14:33:41,444 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 14:33:41,444 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 14:33:41,445 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 14:33:41,445 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 14:33:41,445 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 14:33:41,445 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 14:33:41,460 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-10-04 14:33:41,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-10-04 14:33:41,467 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:41,469 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-10-04 14:33:41,470 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:41,477 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:41,477 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-10-04 14:33:41,480 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:41,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:41,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:41,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:41,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:41,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:41,667 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 14:33:41,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-04 14:33:41,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 14:33:41,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 14:33:41,683 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:41,685 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-10-04 14:33:41,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:41,745 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-04 14:33:41,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 14:33:41,748 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-10-04 14:33:41,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:41,762 INFO L225 Difference]: With dead ends: 9 [2018-10-04 14:33:41,762 INFO L226 Difference]: Without dead ends: 4 [2018-10-04 14:33:41,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-04 14:33:41,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-10-04 14:33:41,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-10-04 14:33:41,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-10-04 14:33:41,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-10-04 14:33:41,803 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-10-04 14:33:41,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:41,803 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-10-04 14:33:41,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 14:33:41,803 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-10-04 14:33:41,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-04 14:33:41,804 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:41,804 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-04 14:33:41,804 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:41,804 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:41,804 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-10-04 14:33:41,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:41,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:41,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:41,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:41,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:41,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:41,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:41,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:41,989 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 [2018-10-04 14:33:42,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:42,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:42,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:42,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:42,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-10-04 14:33:42,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 14:33:42,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 14:33:42,134 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:42,134 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 6 states. [2018-10-04 14:33:42,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:42,195 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-10-04 14:33:42,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 14:33:42,195 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-10-04 14:33:42,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:42,196 INFO L225 Difference]: With dead ends: 6 [2018-10-04 14:33:42,196 INFO L226 Difference]: Without dead ends: 5 [2018-10-04 14:33:42,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 3 [2018-10-04 14:33:42,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-10-04 14:33:42,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-10-04 14:33:42,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-04 14:33:42,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-10-04 14:33:42,200 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-10-04 14:33:42,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:42,200 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-10-04 14:33:42,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 14:33:42,201 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-10-04 14:33:42,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 14:33:42,201 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:42,201 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-10-04 14:33:42,202 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:42,202 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:42,202 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-10-04 14:33:42,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:42,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:42,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:42,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:42,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:42,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:42,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:42,421 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 [2018-10-04 14:33:42,431 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:33:42,455 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:33:42,455 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:42,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:42,533 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:42,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-10-04 14:33:42,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 14:33:42,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 14:33:42,534 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:42,534 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 8 states. [2018-10-04 14:33:42,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:42,675 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-10-04 14:33:42,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 14:33:42,676 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-10-04 14:33:42,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:42,677 INFO L225 Difference]: With dead ends: 7 [2018-10-04 14:33:42,677 INFO L226 Difference]: Without dead ends: 6 [2018-10-04 14:33:42,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 4 [2018-10-04 14:33:42,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-04 14:33:42,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-04 14:33:42,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-04 14:33:42,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-04 14:33:42,680 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-04 14:33:42,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:42,681 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-04 14:33:42,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 14:33:42,681 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-04 14:33:42,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 14:33:42,682 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:42,682 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-10-04 14:33:42,682 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:42,682 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:42,683 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-10-04 14:33:42,683 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:42,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:42,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:42,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:42,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:43,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:43,001 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:43,001 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 [2018-10-04 14:33:43,019 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:33:43,044 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-04 14:33:43,045 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:43,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:43,168 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:43,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-10-04 14:33:43,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 14:33:43,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 14:33:43,169 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:43,169 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 10 states. [2018-10-04 14:33:43,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:43,243 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-10-04 14:33:43,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 14:33:43,243 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-10-04 14:33:43,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:43,244 INFO L225 Difference]: With dead ends: 8 [2018-10-04 14:33:43,245 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 14:33:43,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 5 [2018-10-04 14:33:43,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 14:33:43,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 14:33:43,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 14:33:43,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-04 14:33:43,249 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-04 14:33:43,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:43,249 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-04 14:33:43,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 14:33:43,250 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-04 14:33:43,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 14:33:43,250 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:43,250 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-10-04 14:33:43,251 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:43,251 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:43,251 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-10-04 14:33:43,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:43,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:43,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:43,253 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:43,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:43,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:43,388 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:43,388 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:43,389 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 [2018-10-04 14:33:43,402 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:33:43,433 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:33:43,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:43,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:43,600 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:43,621 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:43,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-10-04 14:33:43,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 14:33:43,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 14:33:43,623 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:43,623 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 12 states. [2018-10-04 14:33:43,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:43,700 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-04 14:33:43,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 14:33:43,702 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-10-04 14:33:43,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:43,703 INFO L225 Difference]: With dead ends: 9 [2018-10-04 14:33:43,703 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 14:33:43,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 6 [2018-10-04 14:33:43,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 14:33:43,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 14:33:43,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 14:33:43,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-04 14:33:43,707 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-04 14:33:43,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:43,707 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-04 14:33:43,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 14:33:43,708 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-04 14:33:43,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 14:33:43,708 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:43,708 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-10-04 14:33:43,709 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:43,709 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:43,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-10-04 14:33:43,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:43,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:43,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:43,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:43,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:43,893 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:43,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:43,893 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 [2018-10-04 14:33:43,908 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:33:43,966 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-04 14:33:43,966 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:43,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:44,458 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:44,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:44,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-10-04 14:33:44,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 14:33:44,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 14:33:44,481 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:44,482 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 14 states. [2018-10-04 14:33:44,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:44,577 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-04 14:33:44,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 14:33:44,578 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 7 [2018-10-04 14:33:44,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:44,579 INFO L225 Difference]: With dead ends: 10 [2018-10-04 14:33:44,579 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 14:33:44,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 7 [2018-10-04 14:33:44,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 14:33:44,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 14:33:44,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 14:33:44,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-04 14:33:44,583 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-04 14:33:44,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:44,584 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-04 14:33:44,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 14:33:44,584 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-04 14:33:44,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 14:33:44,584 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:44,585 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-10-04 14:33:44,585 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:44,585 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:44,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-10-04 14:33:44,585 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:44,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:44,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:44,587 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:44,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:44,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:44,722 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:44,722 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:33:44,731 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:33:44,742 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-04 14:33:44,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:44,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:44,900 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:44,921 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:44,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-10-04 14:33:44,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 14:33:44,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 14:33:44,922 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:44,922 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 16 states. [2018-10-04 14:33:45,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:45,033 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 14:33:45,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 14:33:45,034 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 8 [2018-10-04 14:33:45,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:45,034 INFO L225 Difference]: With dead ends: 11 [2018-10-04 14:33:45,035 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 14:33:45,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 8 [2018-10-04 14:33:45,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 14:33:45,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-04 14:33:45,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 14:33:45,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-04 14:33:45,039 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-04 14:33:45,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:45,040 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-04 14:33:45,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 14:33:45,040 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-04 14:33:45,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 14:33:45,040 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:45,040 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-10-04 14:33:45,041 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:45,041 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:45,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-10-04 14:33:45,041 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:45,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:45,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:45,042 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:45,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:45,535 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:45,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:45,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:33:45,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:45,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:45,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:45,755 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:45,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:45,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-10-04 14:33:45,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 14:33:45,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 14:33:45,778 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:45,779 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 18 states. [2018-10-04 14:33:45,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:45,957 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-04 14:33:45,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 14:33:45,958 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 9 [2018-10-04 14:33:45,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:45,959 INFO L225 Difference]: With dead ends: 12 [2018-10-04 14:33:45,959 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 14:33:45,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 9 [2018-10-04 14:33:45,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 14:33:45,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 14:33:45,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 14:33:45,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-04 14:33:45,964 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-04 14:33:45,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:45,964 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-04 14:33:45,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 14:33:45,964 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-04 14:33:45,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 14:33:45,965 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:45,965 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-10-04 14:33:45,965 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:45,965 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:45,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-10-04 14:33:45,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:45,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:45,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:45,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:45,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:46,125 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:46,125 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 [2018-10-04 14:33:46,141 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:33:46,159 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:33:46,159 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:46,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:46,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:46,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-10-04 14:33:46,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 14:33:46,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 14:33:46,311 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:46,311 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 20 states. [2018-10-04 14:33:46,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:46,452 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 14:33:46,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 14:33:46,454 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 10 [2018-10-04 14:33:46,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:46,455 INFO L225 Difference]: With dead ends: 13 [2018-10-04 14:33:46,455 INFO L226 Difference]: Without dead ends: 12 [2018-10-04 14:33:46,455 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 10 [2018-10-04 14:33:46,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-04 14:33:46,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-04 14:33:46,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 14:33:46,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-04 14:33:46,459 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-04 14:33:46,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:46,460 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-04 14:33:46,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 14:33:46,460 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-04 14:33:46,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 14:33:46,461 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:46,461 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-10-04 14:33:46,461 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:46,461 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:46,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-10-04 14:33:46,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:46,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:46,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:46,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:46,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:46,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:46,661 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:46,661 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:46,661 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 [2018-10-04 14:33:46,670 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:33:46,683 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 14:33:46,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:46,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:46,897 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:46,918 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:46,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-10-04 14:33:46,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 14:33:46,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 14:33:46,920 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:46,920 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 22 states. [2018-10-04 14:33:47,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:47,097 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-04 14:33:47,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 14:33:47,098 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 11 [2018-10-04 14:33:47,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:47,099 INFO L225 Difference]: With dead ends: 14 [2018-10-04 14:33:47,099 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 14:33:47,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 11 [2018-10-04 14:33:47,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 14:33:47,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 14:33:47,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 14:33:47,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-04 14:33:47,103 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-04 14:33:47,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:47,104 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-04 14:33:47,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 14:33:47,104 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-04 14:33:47,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 14:33:47,104 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:47,105 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-10-04 14:33:47,105 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:47,105 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:47,105 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-10-04 14:33:47,105 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:47,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:47,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:47,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:47,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:47,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:47,391 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:47,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:47,391 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 [2018-10-04 14:33:47,401 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:33:47,410 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:33:47,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:47,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:47,607 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:47,628 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:47,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-10-04 14:33:47,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 14:33:47,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 14:33:47,629 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:47,629 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 24 states. [2018-10-04 14:33:47,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:47,964 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-04 14:33:47,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 14:33:47,965 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 12 [2018-10-04 14:33:47,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:47,966 INFO L225 Difference]: With dead ends: 15 [2018-10-04 14:33:47,966 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 14:33:47,966 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 12 [2018-10-04 14:33:47,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 14:33:47,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-04 14:33:47,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 14:33:47,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-04 14:33:47,975 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-04 14:33:47,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:47,975 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-04 14:33:47,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 14:33:47,975 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-04 14:33:47,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 14:33:47,978 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:47,978 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-10-04 14:33:47,978 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:47,978 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:47,978 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-10-04 14:33:47,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:47,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:47,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:47,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:47,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:48,235 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:48,235 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:48,235 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:33:48,266 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:33:48,296 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 14:33:48,296 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:48,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:48,812 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:48,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-10-04 14:33:48,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 14:33:48,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 14:33:48,813 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:48,813 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 26 states. [2018-10-04 14:33:49,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:49,116 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-04 14:33:49,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 14:33:49,116 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 13 [2018-10-04 14:33:49,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:49,117 INFO L225 Difference]: With dead ends: 16 [2018-10-04 14:33:49,118 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 14:33:49,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.5s impTime 13 [2018-10-04 14:33:49,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 14:33:49,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 14:33:49,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 14:33:49,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-04 14:33:49,123 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-04 14:33:49,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:49,123 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-04 14:33:49,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 14:33:49,123 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-04 14:33:49,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 14:33:49,124 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:49,124 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-10-04 14:33:49,124 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:49,124 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:49,124 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-10-04 14:33:49,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:49,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:49,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:49,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:49,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:49,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:49,597 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:49,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:49,597 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:49,605 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:33:49,619 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 14:33:49,619 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:49,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:49,872 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:49,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-10-04 14:33:49,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 14:33:49,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 14:33:49,872 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:49,873 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 28 states. [2018-10-04 14:33:50,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:50,184 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 14:33:50,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 14:33:50,184 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 14 [2018-10-04 14:33:50,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:50,185 INFO L225 Difference]: With dead ends: 17 [2018-10-04 14:33:50,185 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 14:33:50,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.5s impTime 14 [2018-10-04 14:33:50,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 14:33:50,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-04 14:33:50,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 14:33:50,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-04 14:33:50,190 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-04 14:33:50,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:50,190 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-04 14:33:50,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 14:33:50,190 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-04 14:33:50,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 14:33:50,191 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:50,191 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-10-04 14:33:50,191 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:50,191 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:50,191 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-10-04 14:33:50,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:50,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:50,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:50,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:50,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:50,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:50,605 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:50,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:50,606 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 [2018-10-04 14:33:50,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:50,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:50,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:50,932 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:50,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:50,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-10-04 14:33:50,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 14:33:50,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 14:33:50,953 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:50,953 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 30 states. [2018-10-04 14:33:51,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:51,292 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-04 14:33:51,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 14:33:51,293 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 15 [2018-10-04 14:33:51,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:51,294 INFO L225 Difference]: With dead ends: 18 [2018-10-04 14:33:51,294 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 14:33:51,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.5s impTime 15 [2018-10-04 14:33:51,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 14:33:51,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 14:33:51,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 14:33:51,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-04 14:33:51,299 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-04 14:33:51,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:51,299 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-04 14:33:51,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 14:33:51,299 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-04 14:33:51,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 14:33:51,300 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:51,300 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-10-04 14:33:51,300 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:51,300 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:51,300 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-10-04 14:33:51,300 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:51,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:51,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:51,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:51,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:52,171 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:52,171 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:52,171 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:33:52,179 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:33:52,197 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:33:52,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:52,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:52,524 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:52,545 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:52,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-10-04 14:33:52,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 14:33:52,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 14:33:52,546 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:52,546 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 32 states. [2018-10-04 14:33:52,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:52,840 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-04 14:33:52,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 14:33:52,841 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 16 [2018-10-04 14:33:52,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:52,842 INFO L225 Difference]: With dead ends: 19 [2018-10-04 14:33:52,842 INFO L226 Difference]: Without dead ends: 18 [2018-10-04 14:33:52,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.9s impTime 16 [2018-10-04 14:33:52,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-04 14:33:52,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-04 14:33:52,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 14:33:52,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-04 14:33:52,847 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-04 14:33:52,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:52,847 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-04 14:33:52,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 14:33:52,847 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-04 14:33:52,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 14:33:52,848 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:52,848 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-10-04 14:33:52,848 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:52,848 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:52,849 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-10-04 14:33:52,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:52,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:52,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:52,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:52,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:53,591 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:53,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:53,592 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 [2018-10-04 14:33:53,607 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:33:53,710 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 14:33:53,711 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:53,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:54,047 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:54,068 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:54,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-10-04 14:33:54,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 14:33:54,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 14:33:54,069 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:54,069 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 34 states. [2018-10-04 14:33:54,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:54,586 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-04 14:33:54,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 14:33:54,587 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 17 [2018-10-04 14:33:54,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:54,588 INFO L225 Difference]: With dead ends: 20 [2018-10-04 14:33:54,588 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 14:33:54,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.8s impTime 17 [2018-10-04 14:33:54,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 14:33:54,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 14:33:54,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 14:33:54,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-04 14:33:54,594 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-04 14:33:54,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:54,594 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-04 14:33:54,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 14:33:54,595 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-04 14:33:54,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 14:33:54,595 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:54,595 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-10-04 14:33:54,596 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:54,596 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:54,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-10-04 14:33:54,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:54,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:54,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:54,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:54,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:55,123 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:55,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:55,123 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 [2018-10-04 14:33:55,131 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:33:55,144 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:33:55,145 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:55,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:55,451 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:55,471 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:55,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-10-04 14:33:55,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 14:33:55,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 14:33:55,472 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:55,472 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 36 states. [2018-10-04 14:33:56,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:56,028 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 14:33:56,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 14:33:56,029 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 18 [2018-10-04 14:33:56,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:56,030 INFO L225 Difference]: With dead ends: 21 [2018-10-04 14:33:56,030 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 14:33:56,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime 18 [2018-10-04 14:33:56,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 14:33:56,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-04 14:33:56,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 14:33:56,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-04 14:33:56,035 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-04 14:33:56,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:56,035 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-04 14:33:56,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 14:33:56,035 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-04 14:33:56,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 14:33:56,036 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:56,036 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-10-04 14:33:56,036 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:56,037 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:56,037 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-10-04 14:33:56,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:56,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:56,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:56,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:56,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:56,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:56,402 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:56,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:56,403 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:33:56,410 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:33:56,425 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-04 14:33:56,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:56,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:56,766 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:56,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:56,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-10-04 14:33:56,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 14:33:56,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 14:33:56,787 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:56,787 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 38 states. [2018-10-04 14:33:57,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:57,173 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-04 14:33:57,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 14:33:57,173 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 19 [2018-10-04 14:33:57,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:57,173 INFO L225 Difference]: With dead ends: 22 [2018-10-04 14:33:57,174 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 14:33:57,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.5s impTime 19 [2018-10-04 14:33:57,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 14:33:57,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 14:33:57,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 14:33:57,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-04 14:33:57,177 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-04 14:33:57,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:57,177 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-04 14:33:57,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 14:33:57,177 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-04 14:33:57,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 14:33:57,178 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:57,178 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-10-04 14:33:57,178 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:57,178 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:57,178 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-10-04 14:33:57,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:57,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:57,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:57,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:57,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:57,543 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:57,543 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:57,544 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 [2018-10-04 14:33:57,553 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:33:57,572 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-04 14:33:57,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:57,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:57,980 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:58,001 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:58,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-10-04 14:33:58,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 14:33:58,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 14:33:58,002 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:58,002 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 40 states. [2018-10-04 14:33:58,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:58,722 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-04 14:33:58,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 14:33:58,723 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 20 [2018-10-04 14:33:58,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:58,724 INFO L225 Difference]: With dead ends: 23 [2018-10-04 14:33:58,724 INFO L226 Difference]: Without dead ends: 22 [2018-10-04 14:33:58,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime 20 [2018-10-04 14:33:58,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-04 14:33:58,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-04 14:33:58,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 14:33:58,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-04 14:33:58,728 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-04 14:33:58,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:58,729 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-04 14:33:58,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 14:33:58,729 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-04 14:33:58,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-04 14:33:58,729 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:58,730 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-10-04 14:33:58,730 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:58,730 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:58,730 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-10-04 14:33:58,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:58,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:58,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:58,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:58,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:59,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:59,216 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 [2018-10-04 14:33:59,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:59,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:59,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:59,659 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:59,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:59,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-10-04 14:33:59,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 14:33:59,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 14:33:59,688 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:59,688 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 42 states. [2018-10-04 14:34:00,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:00,124 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-04 14:34:00,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 14:34:00,125 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 21 [2018-10-04 14:34:00,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:00,125 INFO L225 Difference]: With dead ends: 24 [2018-10-04 14:34:00,126 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 14:34:00,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime 21 [2018-10-04 14:34:00,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 14:34:00,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 14:34:00,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 14:34:00,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-04 14:34:00,131 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-04 14:34:00,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:00,131 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-04 14:34:00,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 14:34:00,131 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-04 14:34:00,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 14:34:00,132 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:00,132 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-10-04 14:34:00,132 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:00,132 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:00,132 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-10-04 14:34:00,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:00,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:00,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:00,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:00,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:00,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:01,202 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:01,202 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:01,202 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) [2018-10-04 14:34:01,217 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:34:01,232 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:34:01,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:01,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:01,816 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:01,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-10-04 14:34:01,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 14:34:01,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 14:34:01,817 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:01,817 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 44 states. [2018-10-04 14:34:02,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:02,418 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 14:34:02,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 14:34:02,418 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 22 [2018-10-04 14:34:02,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:02,419 INFO L225 Difference]: With dead ends: 25 [2018-10-04 14:34:02,419 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 14:34:02,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.2s impTime 22 [2018-10-04 14:34:02,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 14:34:02,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-04 14:34:02,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 14:34:02,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-04 14:34:02,425 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-04 14:34:02,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:02,426 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-04 14:34:02,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 14:34:02,426 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-04 14:34:02,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 14:34:02,426 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:02,427 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-10-04 14:34:02,427 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:02,427 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:02,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-10-04 14:34:02,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:02,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:02,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:02,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:02,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:02,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:02,978 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:02,978 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 [2018-10-04 14:34:02,985 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:34:03,004 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-04 14:34:03,004 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:03,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:03,727 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:03,747 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:03,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-10-04 14:34:03,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 14:34:03,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 14:34:03,748 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:03,748 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 46 states. [2018-10-04 14:34:04,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:04,367 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-04 14:34:04,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 14:34:04,370 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 23 [2018-10-04 14:34:04,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:04,370 INFO L225 Difference]: With dead ends: 26 [2018-10-04 14:34:04,370 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 14:34:04,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 1.0s impTime 23 [2018-10-04 14:34:04,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 14:34:04,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 14:34:04,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 14:34:04,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-04 14:34:04,374 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-04 14:34:04,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:04,374 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-04 14:34:04,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 14:34:04,374 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-04 14:34:04,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 14:34:04,375 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:04,375 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-10-04 14:34:04,375 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:04,376 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:04,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-10-04 14:34:04,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:04,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:04,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:04,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:04,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:04,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:05,445 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:05,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:05,445 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:34:05,452 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:34:05,467 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:34:05,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:05,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:06,038 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:06,038 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-10-04 14:34:06,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 14:34:06,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 14:34:06,039 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:06,039 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 48 states. [2018-10-04 14:34:06,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:06,735 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-04 14:34:06,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 14:34:06,735 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 24 [2018-10-04 14:34:06,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:06,736 INFO L225 Difference]: With dead ends: 27 [2018-10-04 14:34:06,736 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 14:34:06,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.2s impTime 24 [2018-10-04 14:34:06,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 14:34:06,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-04 14:34:06,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 14:34:06,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-04 14:34:06,741 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-04 14:34:06,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:06,741 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-04 14:34:06,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 14:34:06,741 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-04 14:34:06,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-04 14:34:06,742 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:06,742 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-10-04 14:34:06,742 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:06,742 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:06,742 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-10-04 14:34:06,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:06,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:06,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:06,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:06,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:07,392 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:07,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:07,392 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 [2018-10-04 14:34:07,401 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:34:07,420 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-04 14:34:07,420 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:07,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:07,973 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:07,995 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:07,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-10-04 14:34:07,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 14:34:07,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 14:34:07,996 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:07,996 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 50 states. [2018-10-04 14:34:08,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:08,737 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-04 14:34:08,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 14:34:08,737 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 25 [2018-10-04 14:34:08,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:08,738 INFO L225 Difference]: With dead ends: 28 [2018-10-04 14:34:08,738 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 14:34:08,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.9s impTime 25 [2018-10-04 14:34:08,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 14:34:08,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 14:34:08,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 14:34:08,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-04 14:34:08,743 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-04 14:34:08,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:08,743 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-04 14:34:08,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 14:34:08,743 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-04 14:34:08,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 14:34:08,744 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:08,744 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-10-04 14:34:08,744 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:08,744 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:08,744 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-10-04 14:34:08,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:08,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:08,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:08,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:08,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:08,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:09,345 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:09,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:09,345 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 [2018-10-04 14:34:09,353 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:34:09,373 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 14:34:09,373 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:09,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:10,034 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:10,056 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:10,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-10-04 14:34:10,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 14:34:10,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 14:34:10,057 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:10,057 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 52 states. [2018-10-04 14:34:10,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:10,879 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-04 14:34:10,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 14:34:10,879 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 26 [2018-10-04 14:34:10,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:10,880 INFO L225 Difference]: With dead ends: 29 [2018-10-04 14:34:10,880 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 14:34:10,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 1.0s impTime 26 [2018-10-04 14:34:10,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 14:34:10,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-04 14:34:10,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 14:34:10,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-04 14:34:10,885 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-04 14:34:10,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:10,886 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-04 14:34:10,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 14:34:10,886 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-04 14:34:10,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 14:34:10,886 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:10,886 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-10-04 14:34:10,887 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:10,887 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:10,887 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-10-04 14:34:10,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:10,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:10,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:10,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:10,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:10,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:11,668 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:11,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:11,669 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 [2018-10-04 14:34:11,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:11,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:11,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:12,339 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:12,360 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:12,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-10-04 14:34:12,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 14:34:12,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 14:34:12,361 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:12,361 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 54 states. [2018-10-04 14:34:13,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:13,284 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-04 14:34:13,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 14:34:13,290 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 27 [2018-10-04 14:34:13,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:13,290 INFO L225 Difference]: With dead ends: 30 [2018-10-04 14:34:13,291 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 14:34:13,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.1s impTime 27 [2018-10-04 14:34:13,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 14:34:13,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 14:34:13,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 14:34:13,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-04 14:34:13,297 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-04 14:34:13,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:13,297 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-04 14:34:13,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 14:34:13,297 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-04 14:34:13,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 14:34:13,298 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:13,298 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-10-04 14:34:13,298 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:13,298 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:13,298 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-10-04 14:34:13,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:13,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:13,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:13,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:13,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:14,136 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:14,136 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:14,136 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 [2018-10-04 14:34:14,143 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:34:14,158 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:34:14,158 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:14,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:14,982 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:15,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:15,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-10-04 14:34:15,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 14:34:15,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 14:34:15,004 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:15,004 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 56 states. [2018-10-04 14:34:16,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:16,084 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-04 14:34:16,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 14:34:16,085 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 28 [2018-10-04 14:34:16,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:16,085 INFO L225 Difference]: With dead ends: 31 [2018-10-04 14:34:16,085 INFO L226 Difference]: Without dead ends: 30 [2018-10-04 14:34:16,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.4s impTime 28 [2018-10-04 14:34:16,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-04 14:34:16,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-04 14:34:16,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 14:34:16,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-04 14:34:16,090 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-04 14:34:16,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:16,090 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-04 14:34:16,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 14:34:16,090 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-04 14:34:16,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-04 14:34:16,091 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:16,091 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-10-04 14:34:16,091 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:16,091 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:16,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-10-04 14:34:16,092 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:16,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:16,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:16,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:16,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:16,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:17,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:17,556 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:34:17,564 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:34:17,588 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 14:34:17,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:17,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:18,369 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:18,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:18,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-10-04 14:34:18,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 14:34:18,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 14:34:18,389 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:18,390 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 58 states. [2018-10-04 14:34:19,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:19,369 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-04 14:34:19,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 14:34:19,370 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 29 [2018-10-04 14:34:19,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:19,370 INFO L225 Difference]: With dead ends: 32 [2018-10-04 14:34:19,370 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 14:34:19,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.9s impTime 29 [2018-10-04 14:34:19,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 14:34:19,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 14:34:19,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 14:34:19,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-04 14:34:19,376 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-04 14:34:19,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:19,376 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-04 14:34:19,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 14:34:19,377 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-04 14:34:19,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 14:34:19,377 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:19,377 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-10-04 14:34:19,377 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:19,378 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:19,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-10-04 14:34:19,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:19,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:19,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:19,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:19,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:20,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:20,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:34:20,256 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:34:20,276 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:34:20,276 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:20,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:21,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:21,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-10-04 14:34:21,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 14:34:21,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 14:34:21,176 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:21,176 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 60 states. [2018-10-04 14:34:22,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:22,091 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-04 14:34:22,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 14:34:22,091 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 30 [2018-10-04 14:34:22,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:22,092 INFO L225 Difference]: With dead ends: 33 [2018-10-04 14:34:22,092 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 14:34:22,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.3s impTime 30 [2018-10-04 14:34:22,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 14:34:22,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-04 14:34:22,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 14:34:22,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-04 14:34:22,096 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-04 14:34:22,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:22,097 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-04 14:34:22,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 14:34:22,097 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-04 14:34:22,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-04 14:34:22,098 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:22,098 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-10-04 14:34:22,098 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:22,098 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:22,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-10-04 14:34:22,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:22,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:22,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:22,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:22,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:22,974 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:22,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:22,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:34:22,988 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:34:23,013 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-04 14:34:23,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:23,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:24,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:24,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-10-04 14:34:24,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 14:34:24,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 14:34:24,525 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:24,525 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 62 states. [2018-10-04 14:34:25,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:25,778 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-04 14:34:25,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 14:34:25,779 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 31 [2018-10-04 14:34:25,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:25,780 INFO L225 Difference]: With dead ends: 34 [2018-10-04 14:34:25,780 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 14:34:25,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 1.9s impTime 31 [2018-10-04 14:34:25,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 14:34:25,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 14:34:25,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 14:34:25,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-04 14:34:25,786 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-04 14:34:25,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:25,786 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-04 14:34:25,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 14:34:25,787 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-04 14:34:25,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 14:34:25,787 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:25,787 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-10-04 14:34:25,788 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:25,788 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:25,788 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-10-04 14:34:25,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:25,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:25,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:25,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:25,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:27,082 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:27,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:34:27,106 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:34:27,143 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-04 14:34:27,143 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:27,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:27,986 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:28,007 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:28,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-10-04 14:34:28,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 14:34:28,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 14:34:28,008 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:28,009 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 64 states. [2018-10-04 14:34:29,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:29,044 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-04 14:34:29,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 14:34:29,045 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 32 [2018-10-04 14:34:29,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:29,045 INFO L225 Difference]: With dead ends: 35 [2018-10-04 14:34:29,045 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 14:34:29,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.7s impTime 32 [2018-10-04 14:34:29,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 14:34:29,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-04 14:34:29,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 14:34:29,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-04 14:34:29,050 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-04 14:34:29,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:29,050 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-04 14:34:29,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 14:34:29,050 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-04 14:34:29,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-04 14:34:29,051 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:29,051 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-10-04 14:34:29,051 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:29,051 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:29,051 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-10-04 14:34:29,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:29,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:29,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:29,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:29,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:29,994 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:29,994 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:29,994 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 [2018-10-04 14:34:30,004 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:30,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:31,178 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:31,197 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:31,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-10-04 14:34:31,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 14:34:31,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 14:34:31,198 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:31,198 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 66 states. [2018-10-04 14:34:32,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:32,506 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-04 14:34:32,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 14:34:32,507 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 33 [2018-10-04 14:34:32,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:32,507 INFO L225 Difference]: With dead ends: 36 [2018-10-04 14:34:32,508 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 14:34:32,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.7s impTime 33 [2018-10-04 14:34:32,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 14:34:32,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 14:34:32,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 14:34:32,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-04 14:34:32,512 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-04 14:34:32,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:32,512 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-04 14:34:32,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 14:34:32,512 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-04 14:34:32,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 14:34:32,513 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:32,513 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-10-04 14:34:32,513 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:32,513 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:32,513 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-10-04 14:34:32,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:32,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:32,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:32,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:32,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:32,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:33,581 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:33,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:33,582 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 [2018-10-04 14:34:33,590 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:34:33,610 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:34:33,610 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:33,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:34,719 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:34,740 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:34,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-10-04 14:34:34,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 14:34:34,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 14:34:34,741 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:34,742 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 68 states. [2018-10-04 14:34:35,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:35,814 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-04 14:34:35,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 14:34:35,815 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 34 [2018-10-04 14:34:35,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:35,815 INFO L225 Difference]: With dead ends: 37 [2018-10-04 14:34:35,815 INFO L226 Difference]: Without dead ends: 36 [2018-10-04 14:34:35,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.8s impTime 34 [2018-10-04 14:34:35,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-04 14:34:35,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-04 14:34:35,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-04 14:34:35,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-04 14:34:35,821 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-04 14:34:35,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:35,821 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-04 14:34:35,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 14:34:35,821 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-04 14:34:35,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-04 14:34:35,822 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:35,822 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-10-04 14:34:35,822 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:35,822 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:35,823 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-10-04 14:34:35,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:35,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:35,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:35,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:35,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:35,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:36,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:36,973 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 [2018-10-04 14:34:36,980 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:34:37,007 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-04 14:34:37,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:37,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:38,240 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:38,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-10-04 14:34:38,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 14:34:38,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 14:34:38,241 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:38,241 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 70 states. [2018-10-04 14:34:40,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:40,074 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-04 14:34:40,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 14:34:40,075 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 35 [2018-10-04 14:34:40,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:40,075 INFO L225 Difference]: With dead ends: 38 [2018-10-04 14:34:40,076 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 14:34:40,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 2.0s impTime 35 [2018-10-04 14:34:40,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 14:34:40,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 14:34:40,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 14:34:40,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-04 14:34:40,080 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-04 14:34:40,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:40,081 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-04 14:34:40,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 14:34:40,081 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-04 14:34:40,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 14:34:40,081 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:40,081 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-10-04 14:34:40,082 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:40,082 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:40,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-10-04 14:34:40,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:40,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:40,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:40,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:40,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:41,292 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:41,292 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:41,292 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 [2018-10-04 14:34:41,300 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:34:41,324 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:34:41,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:41,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:42,601 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:42,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:42,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-10-04 14:34:42,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 14:34:42,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 14:34:42,621 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:42,621 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 72 states. [2018-10-04 14:34:44,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:44,119 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-04 14:34:44,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 14:34:44,119 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 36 [2018-10-04 14:34:44,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:44,120 INFO L225 Difference]: With dead ends: 39 [2018-10-04 14:34:44,120 INFO L226 Difference]: Without dead ends: 38 [2018-10-04 14:34:44,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 2.0s impTime 36 [2018-10-04 14:34:44,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-04 14:34:44,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-04 14:34:44,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-04 14:34:44,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-04 14:34:44,124 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-04 14:34:44,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:44,124 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-04 14:34:44,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 14:34:44,125 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-04 14:34:44,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-04 14:34:44,125 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:44,125 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-10-04 14:34:44,125 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:44,126 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:44,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-10-04 14:34:44,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:44,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:44,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:44,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:44,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:44,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:45,300 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:45,300 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:45,300 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 [2018-10-04 14:34:45,307 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:34:45,334 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 14:34:45,334 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:45,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:46,460 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:46,479 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:46,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-10-04 14:34:46,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 14:34:46,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 14:34:46,480 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:46,480 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 74 states. [2018-10-04 14:34:47,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:47,885 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-04 14:34:47,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 14:34:47,886 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 37 [2018-10-04 14:34:47,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:47,887 INFO L225 Difference]: With dead ends: 40 [2018-10-04 14:34:47,887 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 14:34:47,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.9s impTime 37 [2018-10-04 14:34:47,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 14:34:47,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 14:34:47,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 14:34:47,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-04 14:34:47,892 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-04 14:34:47,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:47,892 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-04 14:34:47,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 14:34:47,892 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-04 14:34:47,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 14:34:47,893 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:47,893 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-10-04 14:34:47,893 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:47,893 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:47,893 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-10-04 14:34:47,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:47,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:47,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:47,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:47,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:47,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:48,980 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:48,980 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 [2018-10-04 14:34:48,988 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:34:49,015 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 14:34:49,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:49,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:50,318 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:50,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:50,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-10-04 14:34:50,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 14:34:50,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 14:34:50,339 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:50,339 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 76 states. [2018-10-04 14:34:51,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:51,731 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-04 14:34:51,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 14:34:51,731 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 38 [2018-10-04 14:34:51,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:51,732 INFO L225 Difference]: With dead ends: 41 [2018-10-04 14:34:51,732 INFO L226 Difference]: Without dead ends: 40 [2018-10-04 14:34:51,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 2.1s impTime 38 [2018-10-04 14:34:51,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-04 14:34:51,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-04 14:34:51,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 14:34:51,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-04 14:34:51,736 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-04 14:34:51,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:51,737 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-04 14:34:51,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-04 14:34:51,737 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-04 14:34:51,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-04 14:34:51,737 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:51,738 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-10-04 14:34:51,738 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:51,738 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:51,738 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-10-04 14:34:51,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:51,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:51,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:51,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:51,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:51,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:52,893 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:52,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:52,893 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 [2018-10-04 14:34:52,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:52,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:54,122 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:54,142 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:54,142 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-10-04 14:34:54,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 14:34:54,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 14:34:54,143 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:54,143 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 78 states. [2018-10-04 14:34:55,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:55,672 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-04 14:34:55,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 14:34:55,673 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 39 [2018-10-04 14:34:55,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:55,674 INFO L225 Difference]: With dead ends: 42 [2018-10-04 14:34:55,674 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 14:34:55,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 2.0s impTime 39 [2018-10-04 14:34:55,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 14:34:55,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 14:34:55,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 14:34:55,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-04 14:34:55,678 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-04 14:34:55,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:55,678 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-04 14:34:55,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 14:34:55,678 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-04 14:34:55,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 14:34:55,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:55,678 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-10-04 14:34:55,679 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:55,679 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:55,679 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-10-04 14:34:55,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:55,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:55,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:55,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:55,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:55,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:57,044 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:57,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:57,044 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:34:57,051 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:34:57,074 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:34:57,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:57,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:58,369 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:58,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:58,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-10-04 14:34:58,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 14:34:58,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 14:34:58,390 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:58,390 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 80 states. [2018-10-04 14:35:00,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:00,038 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-04 14:35:00,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 14:35:00,039 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 40 [2018-10-04 14:35:00,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:00,040 INFO L225 Difference]: With dead ends: 43 [2018-10-04 14:35:00,040 INFO L226 Difference]: Without dead ends: 42 [2018-10-04 14:35:00,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.3s impTime 40 [2018-10-04 14:35:00,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-04 14:35:00,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-04 14:35:00,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-04 14:35:00,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-04 14:35:00,045 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-04 14:35:00,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:00,045 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-04 14:35:00,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 14:35:00,045 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-04 14:35:00,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-04 14:35:00,046 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:00,046 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-10-04 14:35:00,046 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:00,046 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:00,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-10-04 14:35:00,047 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:00,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:00,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:00,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:00,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:02,383 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:02,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:02,384 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 [2018-10-04 14:35:02,391 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:35:02,424 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-04 14:35:02,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:02,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:03,858 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:03,878 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:03,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-10-04 14:35:03,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-04 14:35:03,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-04 14:35:03,879 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:03,879 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 82 states. [2018-10-04 14:35:05,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:05,993 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-04 14:35:05,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 14:35:05,994 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 41 [2018-10-04 14:35:05,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:05,995 INFO L225 Difference]: With dead ends: 44 [2018-10-04 14:35:05,995 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 14:35:05,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s Time 3.2s impTime 41 [2018-10-04 14:35:05,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 14:35:05,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 14:35:05,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 14:35:05,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-04 14:35:05,998 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-04 14:35:05,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:05,999 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-04 14:35:05,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-04 14:35:05,999 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-04 14:35:05,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 14:35:05,999 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:05,999 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-10-04 14:35:05,999 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:05,999 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:06,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-10-04 14:35:06,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:06,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:06,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:06,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:06,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:07,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:07,307 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 [2018-10-04 14:35:07,314 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:35:07,341 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:35:07,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:07,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:08,954 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:08,974 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:08,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-10-04 14:35:08,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-04 14:35:08,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-04 14:35:08,974 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:08,974 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 84 states. [2018-10-04 14:35:11,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:11,214 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-04 14:35:11,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 14:35:11,215 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 42 [2018-10-04 14:35:11,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:11,216 INFO L225 Difference]: With dead ends: 45 [2018-10-04 14:35:11,216 INFO L226 Difference]: Without dead ends: 44 [2018-10-04 14:35:11,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.5s impTime 42 [2018-10-04 14:35:11,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-04 14:35:11,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-04 14:35:11,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-04 14:35:11,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-04 14:35:11,219 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-04 14:35:11,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:11,219 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-04 14:35:11,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-04 14:35:11,219 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-04 14:35:11,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-04 14:35:11,219 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:11,220 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-10-04 14:35:11,220 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:11,220 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:11,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-10-04 14:35:11,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:11,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:11,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:11,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:11,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:11,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:12,678 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:12,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:12,679 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 [2018-10-04 14:35:12,686 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:35:12,722 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-04 14:35:12,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:12,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:14,327 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:14,346 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:14,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-10-04 14:35:14,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-04 14:35:14,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-04 14:35:14,348 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:14,348 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 86 states. [2018-10-04 14:35:16,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:16,358 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-04 14:35:16,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 14:35:16,358 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 43 [2018-10-04 14:35:16,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:16,359 INFO L225 Difference]: With dead ends: 46 [2018-10-04 14:35:16,359 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 14:35:16,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time 2.7s impTime 43 [2018-10-04 14:35:16,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 14:35:16,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-04 14:35:16,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 14:35:16,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-04 14:35:16,364 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-04 14:35:16,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:16,364 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-04 14:35:16,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-04 14:35:16,364 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-04 14:35:16,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 14:35:16,364 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:16,364 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-10-04 14:35:16,365 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:16,365 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:16,365 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-10-04 14:35:16,365 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:16,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:16,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:16,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:16,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:18,360 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:18,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:18,360 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 [2018-10-04 14:35:18,367 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:35:18,399 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-04 14:35:18,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:18,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:19,928 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:19,948 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:19,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-10-04 14:35:19,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-04 14:35:19,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-04 14:35:19,949 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:19,949 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 88 states. [2018-10-04 14:35:21,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:21,874 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-04 14:35:21,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 14:35:21,874 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 44 [2018-10-04 14:35:21,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:21,875 INFO L225 Difference]: With dead ends: 47 [2018-10-04 14:35:21,875 INFO L226 Difference]: Without dead ends: 46 [2018-10-04 14:35:21,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time 3.0s impTime 44 [2018-10-04 14:35:21,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-04 14:35:21,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-04 14:35:21,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 14:35:21,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-04 14:35:21,879 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-04 14:35:21,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:21,879 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-04 14:35:21,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-04 14:35:21,879 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-04 14:35:21,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-04 14:35:21,880 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:21,880 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-10-04 14:35:21,880 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:21,880 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:21,880 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-10-04 14:35:21,880 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:21,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:21,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:21,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:21,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:21,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:23,563 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:23,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:23,563 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 [2018-10-04 14:35:23,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:35:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:23,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:25,660 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:25,680 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:25,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-10-04 14:35:25,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-04 14:35:25,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-04 14:35:25,681 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:25,682 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 90 states. [2018-10-04 14:35:28,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:28,336 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-04 14:35:28,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 14:35:28,336 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 45 [2018-10-04 14:35:28,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:28,337 INFO L225 Difference]: With dead ends: 48 [2018-10-04 14:35:28,337 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 14:35:28,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s Time 3.3s impTime 45 [2018-10-04 14:35:28,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 14:35:28,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 14:35:28,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 14:35:28,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-04 14:35:28,342 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-04 14:35:28,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:28,342 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-04 14:35:28,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-04 14:35:28,342 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-04 14:35:28,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 14:35:28,343 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:28,343 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1] [2018-10-04 14:35:28,343 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:28,343 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:28,343 INFO L82 PathProgramCache]: Analyzing trace with hash 667835207, now seen corresponding path program 44 times [2018-10-04 14:35:28,344 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:28,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:28,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:28,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:35:28,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:30,568 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:30,568 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:30,568 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:35:30,575 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:35:30,605 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:35:30,605 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:30,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:32,306 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:32,326 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:32,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-10-04 14:35:32,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-04 14:35:32,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-04 14:35:32,326 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:32,327 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 92 states. [2018-10-04 14:35:34,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:34,187 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-04 14:35:34,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 14:35:34,188 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 46 [2018-10-04 14:35:34,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:34,188 INFO L225 Difference]: With dead ends: 49 [2018-10-04 14:35:34,189 INFO L226 Difference]: Without dead ends: 48 [2018-10-04 14:35:34,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s Time 3.4s impTime 46 [2018-10-04 14:35:34,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-04 14:35:34,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-04 14:35:34,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-04 14:35:34,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-04 14:35:34,193 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-04 14:35:34,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:34,193 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-04 14:35:34,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-04 14:35:34,194 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-04 14:35:34,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 14:35:34,194 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:34,194 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1] [2018-10-04 14:35:34,194 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:34,195 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:34,195 INFO L82 PathProgramCache]: Analyzing trace with hash -771945119, now seen corresponding path program 45 times [2018-10-04 14:35:34,195 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:34,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:34,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:34,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:34,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:34,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:36,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:36,074 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:36,074 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 [2018-10-04 14:35:36,083 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:35:36,125 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-04 14:35:36,125 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:36,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:38,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:38,142 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:38,142 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-10-04 14:35:38,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-04 14:35:38,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-04 14:35:38,143 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:38,143 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 94 states. [2018-10-04 14:35:40,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:40,675 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-04 14:35:40,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 14:35:40,675 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 47 [2018-10-04 14:35:40,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:40,676 INFO L225 Difference]: With dead ends: 50 [2018-10-04 14:35:40,676 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 14:35:40,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s Time 3.4s impTime 47 [2018-10-04 14:35:40,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 14:35:40,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 14:35:40,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 14:35:40,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-04 14:35:40,680 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-04 14:35:40,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:40,680 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-04 14:35:40,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-04 14:35:40,680 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-04 14:35:40,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 14:35:40,681 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:40,681 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1] [2018-10-04 14:35:40,681 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:40,681 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:40,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505031, now seen corresponding path program 46 times [2018-10-04 14:35:40,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:40,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:40,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:40,682 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:40,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:42,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:42,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:42,553 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 [2018-10-04 14:35:42,560 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:35:42,591 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:35:42,591 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:42,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:44,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:44,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:44,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-10-04 14:35:44,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-04 14:35:44,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-04 14:35:44,589 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:44,589 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 96 states. [2018-10-04 14:35:47,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:47,333 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-04 14:35:47,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 14:35:47,333 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 48 [2018-10-04 14:35:47,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:47,334 INFO L225 Difference]: With dead ends: 51 [2018-10-04 14:35:47,334 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 14:35:47,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s Time 3.4s impTime 48 [2018-10-04 14:35:47,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 14:35:47,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-04 14:35:47,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 14:35:47,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-04 14:35:47,338 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-04 14:35:47,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:47,338 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-04 14:35:47,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-04 14:35:47,339 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-04 14:35:47,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-04 14:35:47,339 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:47,339 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1] [2018-10-04 14:35:47,339 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:47,339 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:47,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081057, now seen corresponding path program 47 times [2018-10-04 14:35:47,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:47,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:47,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:47,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:47,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:49,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:49,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:49,206 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 [2018-10-04 14:35:49,213 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:35:49,252 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-04 14:35:49,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:49,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:51,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:51,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:51,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-10-04 14:35:51,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-04 14:35:51,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-04 14:35:51,310 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:51,310 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 98 states. [2018-10-04 14:35:53,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:53,613 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-04 14:35:53,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 14:35:53,615 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 49 [2018-10-04 14:35:53,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:53,615 INFO L225 Difference]: With dead ends: 52 [2018-10-04 14:35:53,615 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 14:35:53,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s Time 3.5s impTime 49 [2018-10-04 14:35:53,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 14:35:53,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 14:35:53,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 14:35:53,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-04 14:35:53,619 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-04 14:35:53,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:53,619 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-04 14:35:53,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-04 14:35:53,620 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-04 14:35:53,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 14:35:53,620 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:53,620 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1] [2018-10-04 14:35:53,620 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:53,620 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:53,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192953, now seen corresponding path program 48 times [2018-10-04 14:35:53,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:53,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:53,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:53,621 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:53,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:53,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:55,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:55,454 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:55,454 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 [2018-10-04 14:35:55,461 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:35:55,500 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 14:35:55,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:55,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:57,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:57,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:57,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-10-04 14:35:57,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-04 14:35:57,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-04 14:35:57,657 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:57,658 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 100 states. [2018-10-04 14:35:59,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:59,384 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-04 14:35:59,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 14:35:59,384 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 50 [2018-10-04 14:35:59,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:59,385 INFO L225 Difference]: With dead ends: 53 [2018-10-04 14:35:59,385 INFO L226 Difference]: Without dead ends: 52 [2018-10-04 14:35:59,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s Time 3.5s impTime 50 [2018-10-04 14:35:59,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-04 14:35:59,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-04 14:35:59,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 14:35:59,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-04 14:35:59,390 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-04 14:35:59,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:59,391 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-04 14:35:59,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-04 14:35:59,391 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-04 14:35:59,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-04 14:35:59,391 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:59,391 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1] [2018-10-04 14:35:59,392 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:59,392 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:59,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593249, now seen corresponding path program 49 times [2018-10-04 14:35:59,392 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:59,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:59,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:59,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:59,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:01,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:01,647 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:01,647 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:36:01,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:36:01,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:01,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:03,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:03,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:03,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-10-04 14:36:03,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-04 14:36:03,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-04 14:36:03,592 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:03,592 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 102 states. [2018-10-04 14:36:05,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:05,526 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-04 14:36:05,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 14:36:05,527 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 51 [2018-10-04 14:36:05,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:05,528 INFO L225 Difference]: With dead ends: 54 [2018-10-04 14:36:05,528 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 14:36:05,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s Time 3.7s impTime 51 [2018-10-04 14:36:05,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 14:36:05,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 14:36:05,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 14:36:05,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-04 14:36:05,533 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-04 14:36:05,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:05,533 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-04 14:36:05,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-04 14:36:05,533 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-04 14:36:05,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 14:36:05,533 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:05,534 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1] [2018-10-04 14:36:05,534 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:05,534 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:05,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1250315001, now seen corresponding path program 50 times [2018-10-04 14:36:05,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:05,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:05,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:05,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:36:05,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:08,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:08,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:08,172 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 14:36:08,181 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:36:08,220 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:36:08,220 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:08,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:10,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:10,344 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:10,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-10-04 14:36:10,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-04 14:36:10,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-04 14:36:10,345 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:10,345 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 104 states. [2018-10-04 14:36:12,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:12,466 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-04 14:36:12,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 14:36:12,466 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 52 [2018-10-04 14:36:12,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:12,467 INFO L225 Difference]: With dead ends: 55 [2018-10-04 14:36:12,467 INFO L226 Difference]: Without dead ends: 54 [2018-10-04 14:36:12,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s Time 4.1s impTime 52 [2018-10-04 14:36:12,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-04 14:36:12,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-04 14:36:12,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-04 14:36:12,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-04 14:36:12,471 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-04 14:36:12,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:12,472 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-04 14:36:12,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-04 14:36:12,472 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-04 14:36:12,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 14:36:12,472 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:12,473 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1] [2018-10-04 14:36:12,473 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:12,473 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:12,473 INFO L82 PathProgramCache]: Analyzing trace with hash -105059423, now seen corresponding path program 51 times [2018-10-04 14:36:12,473 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:12,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:12,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:12,474 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:12,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:14,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:14,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:14,789 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 [2018-10-04 14:36:14,796 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:36:14,859 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-04 14:36:14,859 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:14,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:17,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:17,155 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:17,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-10-04 14:36:17,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-04 14:36:17,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-04 14:36:17,156 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:17,156 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 106 states. [2018-10-04 14:36:19,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:19,204 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-04 14:36:19,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 14:36:19,204 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 53 [2018-10-04 14:36:19,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:19,205 INFO L225 Difference]: With dead ends: 56 [2018-10-04 14:36:19,205 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 14:36:19,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s Time 4.0s impTime 53 [2018-10-04 14:36:19,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 14:36:19,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 14:36:19,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 14:36:19,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-04 14:36:19,209 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-04 14:36:19,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:19,210 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-04 14:36:19,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-04 14:36:19,210 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-04 14:36:19,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 14:36:19,210 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:19,211 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1] [2018-10-04 14:36:19,211 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:19,211 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:19,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125127, now seen corresponding path program 52 times [2018-10-04 14:36:19,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:19,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:19,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:19,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:19,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:21,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:21,283 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:21,283 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 [2018-10-04 14:36:21,290 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:36:21,323 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:36:21,323 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:21,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:23,667 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:23,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-10-04 14:36:23,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-04 14:36:23,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-04 14:36:23,668 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:23,668 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 108 states. [2018-10-04 14:36:26,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:26,010 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-04 14:36:26,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 14:36:26,010 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 54 [2018-10-04 14:36:26,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:26,011 INFO L225 Difference]: With dead ends: 57 [2018-10-04 14:36:26,011 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 14:36:26,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s Time 4.0s impTime 54 [2018-10-04 14:36:26,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 14:36:26,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-04 14:36:26,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 14:36:26,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-04 14:36:26,015 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-04 14:36:26,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:26,015 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-04 14:36:26,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-04 14:36:26,015 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-04 14:36:26,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-04 14:36:26,016 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:26,016 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1] [2018-10-04 14:36:26,016 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:26,016 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:26,016 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107809, now seen corresponding path program 53 times [2018-10-04 14:36:26,016 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:26,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:26,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:26,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:26,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:26,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:28,320 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:28,320 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 [2018-10-04 14:36:28,328 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:36:28,375 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-04 14:36:28,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:28,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:30,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:30,813 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:30,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-10-04 14:36:30,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-04 14:36:30,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-04 14:36:30,814 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:30,814 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 110 states. [2018-10-04 14:36:33,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:33,675 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-04 14:36:33,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 14:36:33,676 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 55 [2018-10-04 14:36:33,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:33,677 INFO L225 Difference]: With dead ends: 58 [2018-10-04 14:36:33,677 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 14:36:33,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s Time 4.3s impTime 55 [2018-10-04 14:36:33,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 14:36:33,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-04 14:36:33,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-04 14:36:33,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-04 14:36:33,681 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-04 14:36:33,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:33,682 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-04 14:36:33,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-04 14:36:33,682 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-04 14:36:33,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 14:36:33,682 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:33,683 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1] [2018-10-04 14:36:33,683 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:33,683 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:33,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832583, now seen corresponding path program 54 times [2018-10-04 14:36:33,683 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:33,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:33,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:33,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:33,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:33,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:35,978 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:35,978 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 [2018-10-04 14:36:35,987 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:36:36,030 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-04 14:36:36,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:36,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:38,890 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:38,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-10-04 14:36:38,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-04 14:36:38,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-04 14:36:38,891 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:38,891 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 112 states. [2018-10-04 14:36:42,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:42,221 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-04 14:36:42,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 14:36:42,221 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 56 [2018-10-04 14:36:42,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:42,222 INFO L225 Difference]: With dead ends: 59 [2018-10-04 14:36:42,222 INFO L226 Difference]: Without dead ends: 58 [2018-10-04 14:36:42,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s Time 4.7s impTime 56 [2018-10-04 14:36:42,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-04 14:36:42,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-04 14:36:42,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-04 14:36:42,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-04 14:36:42,226 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-04 14:36:42,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:42,226 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-04 14:36:42,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-04 14:36:42,226 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-04 14:36:42,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-04 14:36:42,227 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:42,227 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1] [2018-10-04 14:36:42,227 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:42,227 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:42,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895647, now seen corresponding path program 55 times [2018-10-04 14:36:42,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:42,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:42,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:42,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:42,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:44,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:44,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:44,576 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 [2018-10-04 14:36:44,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:36:44,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:44,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:47,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:47,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:47,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-10-04 14:36:47,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-10-04 14:36:47,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-10-04 14:36:47,459 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:47,459 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 114 states. [2018-10-04 14:36:51,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:51,283 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-04 14:36:51,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 14:36:51,284 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 57 [2018-10-04 14:36:51,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:51,285 INFO L225 Difference]: With dead ends: 60 [2018-10-04 14:36:51,285 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 14:36:51,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s Time 4.7s impTime 57 [2018-10-04 14:36:51,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 14:36:51,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 14:36:51,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 14:36:51,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-04 14:36:51,289 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-04 14:36:51,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:51,289 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-04 14:36:51,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-10-04 14:36:51,289 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-04 14:36:51,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 14:36:51,289 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:51,289 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1] [2018-10-04 14:36:51,290 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:51,290 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:51,290 INFO L82 PathProgramCache]: Analyzing trace with hash -836059449, now seen corresponding path program 56 times [2018-10-04 14:36:51,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:51,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:51,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:51,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:36:51,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:51,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:53,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:53,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:53,843 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 [2018-10-04 14:36:53,850 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:36:53,882 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:36:53,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:53,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:57,060 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:57,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-10-04 14:36:57,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-10-04 14:36:57,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-10-04 14:36:57,061 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:57,061 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 116 states. [2018-10-04 14:37:01,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:01,717 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-04 14:37:01,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 14:37:01,718 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 58 [2018-10-04 14:37:01,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:01,719 INFO L225 Difference]: With dead ends: 61 [2018-10-04 14:37:01,719 INFO L226 Difference]: Without dead ends: 60 [2018-10-04 14:37:01,719 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s Time 5.3s impTime 58 [2018-10-04 14:37:01,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-04 14:37:01,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-04 14:37:01,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-04 14:37:01,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-04 14:37:01,723 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-04 14:37:01,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:01,723 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-04 14:37:01,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-10-04 14:37:01,723 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-04 14:37:01,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-04 14:37:01,724 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:01,724 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1] [2018-10-04 14:37:01,724 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:01,724 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:01,724 INFO L82 PathProgramCache]: Analyzing trace with hash -148039199, now seen corresponding path program 57 times [2018-10-04 14:37:01,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:01,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:01,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:01,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:01,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:01,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:04,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:04,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:04,378 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 [2018-10-04 14:37:04,386 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:37:04,453 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-04 14:37:04,453 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:04,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:06,958 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:06,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-10-04 14:37:06,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-10-04 14:37:06,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-10-04 14:37:06,959 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:06,959 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 118 states. [2018-10-04 14:37:09,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:09,957 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-04 14:37:09,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 14:37:09,958 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 59 [2018-10-04 14:37:09,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:09,959 INFO L225 Difference]: With dead ends: 62 [2018-10-04 14:37:09,959 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 14:37:09,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s Time 4.7s impTime 59 [2018-10-04 14:37:09,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 14:37:09,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 14:37:09,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 14:37:09,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-04 14:37:09,964 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-04 14:37:09,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:09,964 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-04 14:37:09,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-10-04 14:37:09,964 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-04 14:37:09,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 14:37:09,965 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:09,965 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1] [2018-10-04 14:37:09,965 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:09,965 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:09,965 INFO L82 PathProgramCache]: Analyzing trace with hash -294247929, now seen corresponding path program 58 times [2018-10-04 14:37:09,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:09,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:09,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:09,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:09,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:09,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:12,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:12,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:12,735 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 [2018-10-04 14:37:12,752 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:37:12,788 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:37:12,789 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:12,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:15,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:15,861 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:15,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-10-04 14:37:15,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-10-04 14:37:15,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-10-04 14:37:15,862 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:15,862 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 120 states. [2018-10-04 14:37:19,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:19,805 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-04 14:37:19,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 14:37:19,805 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 60 [2018-10-04 14:37:19,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:19,806 INFO L225 Difference]: With dead ends: 63 [2018-10-04 14:37:19,806 INFO L226 Difference]: Without dead ends: 62 [2018-10-04 14:37:19,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7s Time 5.3s impTime 60 [2018-10-04 14:37:19,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-04 14:37:19,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-04 14:37:19,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-04 14:37:19,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-04 14:37:19,811 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-10-04 14:37:19,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:19,811 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-04 14:37:19,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-10-04 14:37:19,811 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-04 14:37:19,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-04 14:37:19,812 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:19,812 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1] [2018-10-04 14:37:19,812 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:19,812 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:19,812 INFO L82 PathProgramCache]: Analyzing trace with hash -531751263, now seen corresponding path program 59 times [2018-10-04 14:37:19,812 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:19,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:19,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:19,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:19,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:19,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:22,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:22,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:22,484 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 [2018-10-04 14:37:22,492 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:37:22,541 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-04 14:37:22,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:22,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:26,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:26,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:26,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 120 [2018-10-04 14:37:26,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-10-04 14:37:26,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-10-04 14:37:26,474 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:26,474 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 122 states. [2018-10-04 14:37:31,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:31,472 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-04 14:37:31,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 14:37:31,472 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 61 [2018-10-04 14:37:31,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:31,473 INFO L225 Difference]: With dead ends: 64 [2018-10-04 14:37:31,473 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 14:37:31,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4s Time 6.1s impTime 61 [2018-10-04 14:37:31,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 14:37:31,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-04 14:37:31,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 14:37:31,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-04 14:37:31,477 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-10-04 14:37:31,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:31,477 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-04 14:37:31,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-10-04 14:37:31,477 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-04 14:37:31,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 14:37:31,478 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:31,478 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1] [2018-10-04 14:37:31,478 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:31,478 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:31,478 INFO L82 PathProgramCache]: Analyzing trace with hash 695579975, now seen corresponding path program 60 times [2018-10-04 14:37:31,478 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:31,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:31,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:31,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:31,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:31,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:34,480 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:34,480 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 [2018-10-04 14:37:34,488 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:37:34,541 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-04 14:37:34,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:34,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:37,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:37,420 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:37,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 122 [2018-10-04 14:37:37,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-10-04 14:37:37,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-10-04 14:37:37,421 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:37,421 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 124 states. [2018-10-04 14:37:41,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:41,056 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-04 14:37:41,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 14:37:41,057 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 62 [2018-10-04 14:37:41,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:41,057 INFO L225 Difference]: With dead ends: 65 [2018-10-04 14:37:41,057 INFO L226 Difference]: Without dead ends: 64 [2018-10-04 14:37:41,057 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7s Time 5.3s impTime 62 [2018-10-04 14:37:41,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-04 14:37:41,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-04 14:37:41,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-04 14:37:41,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-04 14:37:41,061 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-10-04 14:37:41,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:41,061 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-04 14:37:41,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-10-04 14:37:41,062 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-04 14:37:41,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-04 14:37:41,062 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:41,062 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1] [2018-10-04 14:37:41,062 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:41,062 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:41,062 INFO L82 PathProgramCache]: Analyzing trace with hash 88142689, now seen corresponding path program 61 times [2018-10-04 14:37:41,062 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:41,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:41,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:41,063 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:41,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:44,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:44,289 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 [2018-10-04 14:37:44,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:44,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:44,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:47,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:47,610 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:47,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-10-04 14:37:47,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-10-04 14:37:47,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-10-04 14:37:47,611 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:47,612 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 126 states. Received shutdown request... [2018-10-04 14:37:50,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 14:37:50,907 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 14:37:50,914 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 14:37:50,915 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 02:37:50 BoogieIcfgContainer [2018-10-04 14:37:50,915 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 14:37:50,916 INFO L168 Benchmark]: Toolchain (without parser) took 249868.35 ms. Allocated memory was 1.6 GB in the beginning and 1.5 GB in the end (delta: -66.6 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 201.6 MB). Peak memory consumption was 135.0 MB. Max. memory is 7.1 GB. [2018-10-04 14:37:50,918 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.24 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 14:37:50,918 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.99 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 14:37:50,919 INFO L168 Benchmark]: Boogie Preprocessor took 25.22 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 14:37:50,919 INFO L168 Benchmark]: RCFGBuilder took 252.57 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 14:37:50,920 INFO L168 Benchmark]: TraceAbstraction took 249543.65 ms. Allocated memory was 1.6 GB in the beginning and 1.5 GB in the end (delta: -66.6 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 180.5 MB). Peak memory consumption was 113.9 MB. Max. memory is 7.1 GB. [2018-10-04 14:37:50,924 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 0.24 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.99 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.22 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 252.57 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 249543.65 ms. Allocated memory was 1.6 GB in the beginning and 1.5 GB in the end (delta: -66.6 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 180.5 MB). Peak memory consumption was 113.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 18]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 18). Cancelled while BasicCegarLoop was constructing difference of abstraction (64states) and FLOYD_HOARE automaton (currently 44 states, 126 states before enhancement), while ReachableStatesComputation was computing reachable states (42 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. TIMEOUT Result, 249.4s OverallTime, 62 OverallIterations, 61 TraceHistogramMax, 90.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 124 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 122609 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 76.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3905 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3905 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 150.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=61, 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: 0.2s AutomataMinimizationTime, 61 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 153.3s InterpolantComputationTime, 4028 NumberOfCodeBlocks, 4028 NumberOfCodeBlocksAsserted, 628 NumberOfCheckSat, 3905 ConstructedInterpolants, 0 QuantifiedInterpolants, 2137899 SizeOfPredicates, 0 NumberOfNonLiveVariables, 7991 ConjunctsInSsa, 7808 ConjunctsInUnsatCore, 123 InterpolantComputations, 1 PerfectInterpolantSequences, 0/79422 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_14-37-50-935.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_14-37-50-935.csv Completed graceful shutdown