java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/real-life/threadpooling_product_WithoutIf.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b2fde6a [2018-09-28 09:56:04,425 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-28 09:56:04,427 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-28 09:56:04,443 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-28 09:56:04,443 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-28 09:56:04,444 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-28 09:56:04,445 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-28 09:56:04,447 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-28 09:56:04,449 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-28 09:56:04,450 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-28 09:56:04,450 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-28 09:56:04,451 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-28 09:56:04,455 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-28 09:56:04,456 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-28 09:56:04,458 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-28 09:56:04,459 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-28 09:56:04,460 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-28 09:56:04,461 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-28 09:56:04,463 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-28 09:56:04,466 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-28 09:56:04,467 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-28 09:56:04,469 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-28 09:56:04,471 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-28 09:56:04,473 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-28 09:56:04,474 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-28 09:56:04,474 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-28 09:56:04,477 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-28 09:56:04,478 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-28 09:56:04,479 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-28 09:56:04,480 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-28 09:56:04,480 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-28 09:56:04,481 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-09-28 09:56:04,485 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-28 09:56:04,508 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-28 09:56:04,508 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-28 09:56:04,509 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-28 09:56:04,509 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-28 09:56:04,510 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-28 09:56:04,510 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-28 09:56:04,510 INFO L133 SettingsManager]: * Use SBE=true [2018-09-28 09:56:04,510 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-28 09:56:04,511 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-28 09:56:04,511 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-28 09:56:04,511 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-28 09:56:04,511 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-28 09:56:04,511 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-28 09:56:04,512 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-28 09:56:04,512 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-28 09:56:04,512 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-28 09:56:04,512 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-28 09:56:04,512 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-28 09:56:04,514 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-28 09:56:04,514 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-28 09:56:04,514 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-28 09:56:04,514 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-28 09:56:04,515 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 09:56:04,515 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-28 09:56:04,515 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-28 09:56:04,515 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-28 09:56:04,515 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-28 09:56:04,516 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-28 09:56:04,516 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-28 09:56:04,516 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-28 09:56:04,558 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-28 09:56:04,572 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-28 09:56:04,576 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-28 09:56:04,577 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-28 09:56:04,578 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-28 09:56:04,579 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/threadpooling_product_WithoutIf.bpl [2018-09-28 09:56:04,579 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/threadpooling_product_WithoutIf.bpl' [2018-09-28 09:56:04,641 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-28 09:56:04,644 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-28 09:56:04,645 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-28 09:56:04,645 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-28 09:56:04,646 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-28 09:56:04,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:56:04" (1/1) ... [2018-09-28 09:56:04,678 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:56:04" (1/1) ... [2018-09-28 09:56:04,683 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-28 09:56:04,683 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-28 09:56:04,684 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-28 09:56:04,686 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-28 09:56:04,687 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-28 09:56:04,687 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-28 09:56:04,687 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-28 09:56:04,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:56:04" (1/1) ... [2018-09-28 09:56:04,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:56:04" (1/1) ... [2018-09-28 09:56:04,699 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:56:04" (1/1) ... [2018-09-28 09:56:04,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:56:04" (1/1) ... [2018-09-28 09:56:04,702 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:56:04" (1/1) ... [2018-09-28 09:56:04,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:56:04" (1/1) ... [2018-09-28 09:56:04,708 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:56:04" (1/1) ... [2018-09-28 09:56:04,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-28 09:56:04,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-28 09:56:04,710 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-28 09:56:04,710 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-28 09:56:04,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:56:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 09:56:04,783 INFO L124 BoogieDeclarations]: Specification and implementation of procedure product given in one single declaration [2018-09-28 09:56:04,783 INFO L130 BoogieDeclarations]: Found specification of procedure product [2018-09-28 09:56:04,784 INFO L138 BoogieDeclarations]: Found implementation of procedure product [2018-09-28 09:56:05,145 INFO L350 CfgBuilder]: Using library mode [2018-09-28 09:56:05,146 INFO L202 PluginConnector]: Adding new model threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 09:56:05 BoogieIcfgContainer [2018-09-28 09:56:05,146 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-28 09:56:05,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-28 09:56:05,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-28 09:56:05,150 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-28 09:56:05,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:56:04" (1/2) ... [2018-09-28 09:56:05,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30969cae and model type threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.09 09:56:05, skipping insertion in model container [2018-09-28 09:56:05,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 09:56:05" (2/2) ... [2018-09-28 09:56:05,154 INFO L112 eAbstractionObserver]: Analyzing ICFG threadpooling_product_WithoutIf.bpl [2018-09-28 09:56:05,164 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-28 09:56:05,173 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-09-28 09:56:05,225 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-28 09:56:05,226 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-28 09:56:05,226 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-28 09:56:05,226 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-28 09:56:05,226 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-28 09:56:05,226 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-28 09:56:05,227 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-28 09:56:05,227 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-28 09:56:05,227 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-28 09:56:05,243 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2018-09-28 09:56:05,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-28 09:56:05,250 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:05,251 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-28 09:56:05,252 INFO L423 AbstractCegarLoop]: === Iteration 1 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:05,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:05,259 INFO L82 PathProgramCache]: Analyzing trace with hash 927686, now seen corresponding path program 1 times [2018-09-28 09:56:05,261 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:05,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:05,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:05,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:05,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:05,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:05,478 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 09:56:05,479 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-28 09:56:05,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 09:56:05,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 09:56:05,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-28 09:56:05,502 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2018-09-28 09:56:06,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:06,042 INFO L93 Difference]: Finished difference Result 32 states and 51 transitions. [2018-09-28 09:56:06,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 09:56:06,044 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-09-28 09:56:06,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:06,058 INFO L225 Difference]: With dead ends: 32 [2018-09-28 09:56:06,059 INFO L226 Difference]: Without dead ends: 30 [2018-09-28 09:56:06,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-28 09:56:06,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-28 09:56:06,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2018-09-28 09:56:06,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 09:56:06,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 37 transitions. [2018-09-28 09:56:06,105 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 37 transitions. Word has length 4 [2018-09-28 09:56:06,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:06,105 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 37 transitions. [2018-09-28 09:56:06,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 09:56:06,106 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 37 transitions. [2018-09-28 09:56:06,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-28 09:56:06,106 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:06,107 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-28 09:56:06,107 INFO L423 AbstractCegarLoop]: === Iteration 2 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:06,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:06,108 INFO L82 PathProgramCache]: Analyzing trace with hash 930088, now seen corresponding path program 1 times [2018-09-28 09:56:06,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:06,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:06,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:06,109 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:06,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:06,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:06,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:06,200 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 09:56:06,200 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-28 09:56:06,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 09:56:06,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 09:56:06,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-28 09:56:06,203 INFO L87 Difference]: Start difference. First operand 24 states and 37 transitions. Second operand 5 states. [2018-09-28 09:56:06,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:06,503 INFO L93 Difference]: Finished difference Result 38 states and 61 transitions. [2018-09-28 09:56:06,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 09:56:06,504 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-09-28 09:56:06,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:06,505 INFO L225 Difference]: With dead ends: 38 [2018-09-28 09:56:06,505 INFO L226 Difference]: Without dead ends: 36 [2018-09-28 09:56:06,506 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-28 09:56:06,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-28 09:56:06,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2018-09-28 09:56:06,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 09:56:06,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 47 transitions. [2018-09-28 09:56:06,515 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 47 transitions. Word has length 4 [2018-09-28 09:56:06,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:06,515 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 47 transitions. [2018-09-28 09:56:06,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 09:56:06,516 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 47 transitions. [2018-09-28 09:56:06,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-28 09:56:06,516 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:06,516 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-28 09:56:06,517 INFO L423 AbstractCegarLoop]: === Iteration 3 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:06,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:06,518 INFO L82 PathProgramCache]: Analyzing trace with hash 28768015, now seen corresponding path program 1 times [2018-09-28 09:56:06,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:06,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:06,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:06,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:06,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:06,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:06,612 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 09:56:06,612 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-28 09:56:06,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 09:56:06,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 09:56:06,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-28 09:56:06,614 INFO L87 Difference]: Start difference. First operand 30 states and 47 transitions. Second operand 6 states. [2018-09-28 09:56:07,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:07,261 INFO L93 Difference]: Finished difference Result 43 states and 67 transitions. [2018-09-28 09:56:07,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 09:56:07,262 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-28 09:56:07,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:07,263 INFO L225 Difference]: With dead ends: 43 [2018-09-28 09:56:07,263 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 09:56:07,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-09-28 09:56:07,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 09:56:07,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2018-09-28 09:56:07,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-28 09:56:07,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 59 transitions. [2018-09-28 09:56:07,274 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 59 transitions. Word has length 5 [2018-09-28 09:56:07,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:07,275 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 59 transitions. [2018-09-28 09:56:07,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 09:56:07,275 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 59 transitions. [2018-09-28 09:56:07,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-28 09:56:07,276 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:07,276 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-28 09:56:07,276 INFO L423 AbstractCegarLoop]: === Iteration 4 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:07,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:07,277 INFO L82 PathProgramCache]: Analyzing trace with hash 28831153, now seen corresponding path program 1 times [2018-09-28 09:56:07,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:07,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:07,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:07,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:07,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:07,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:07,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:07,389 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 09:56:07,389 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-28 09:56:07,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 09:56:07,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 09:56:07,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-28 09:56:07,391 INFO L87 Difference]: Start difference. First operand 37 states and 59 transitions. Second operand 6 states. [2018-09-28 09:56:07,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:07,701 INFO L93 Difference]: Finished difference Result 54 states and 89 transitions. [2018-09-28 09:56:07,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 09:56:07,705 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-28 09:56:07,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:07,706 INFO L225 Difference]: With dead ends: 54 [2018-09-28 09:56:07,706 INFO L226 Difference]: Without dead ends: 52 [2018-09-28 09:56:07,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-28 09:56:07,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-28 09:56:07,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2018-09-28 09:56:07,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-28 09:56:07,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 70 transitions. [2018-09-28 09:56:07,720 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 70 transitions. Word has length 5 [2018-09-28 09:56:07,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:07,721 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 70 transitions. [2018-09-28 09:56:07,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 09:56:07,721 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 70 transitions. [2018-09-28 09:56:07,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-28 09:56:07,722 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:07,722 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:07,723 INFO L423 AbstractCegarLoop]: === Iteration 5 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:07,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:07,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1974033510, now seen corresponding path program 1 times [2018-09-28 09:56:07,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:07,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:07,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:07,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:07,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:07,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:07,911 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:07,912 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:07,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:07,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:08,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:08,511 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:08,512 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-28 09:56:08,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 09:56:08,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 09:56:08,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-28 09:56:08,513 INFO L87 Difference]: Start difference. First operand 43 states and 70 transitions. Second operand 14 states. [2018-09-28 09:56:09,794 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 9 [2018-09-28 09:56:10,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:10,197 INFO L93 Difference]: Finished difference Result 107 states and 168 transitions. [2018-09-28 09:56:10,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-28 09:56:10,198 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 8 [2018-09-28 09:56:10,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:10,201 INFO L225 Difference]: With dead ends: 107 [2018-09-28 09:56:10,201 INFO L226 Difference]: Without dead ends: 106 [2018-09-28 09:56:10,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2018-09-28 09:56:10,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-28 09:56:10,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 64. [2018-09-28 09:56:10,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-28 09:56:10,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 109 transitions. [2018-09-28 09:56:10,219 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 109 transitions. Word has length 8 [2018-09-28 09:56:10,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:10,219 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 109 transitions. [2018-09-28 09:56:10,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 09:56:10,220 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 109 transitions. [2018-09-28 09:56:10,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-28 09:56:10,221 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:10,221 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:10,221 INFO L423 AbstractCegarLoop]: === Iteration 6 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:10,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:10,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1974032228, now seen corresponding path program 1 times [2018-09-28 09:56:10,222 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:10,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:10,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:10,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:10,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:10,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:10,388 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 09:56:10,388 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-28 09:56:10,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 09:56:10,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 09:56:10,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-09-28 09:56:10,390 INFO L87 Difference]: Start difference. First operand 64 states and 109 transitions. Second operand 8 states. [2018-09-28 09:56:10,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:10,807 INFO L93 Difference]: Finished difference Result 95 states and 152 transitions. [2018-09-28 09:56:10,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-28 09:56:10,808 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-28 09:56:10,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:10,809 INFO L225 Difference]: With dead ends: 95 [2018-09-28 09:56:10,810 INFO L226 Difference]: Without dead ends: 93 [2018-09-28 09:56:10,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2018-09-28 09:56:10,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-28 09:56:10,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2018-09-28 09:56:10,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-28 09:56:10,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 134 transitions. [2018-09-28 09:56:10,829 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 134 transitions. Word has length 8 [2018-09-28 09:56:10,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:10,830 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 134 transitions. [2018-09-28 09:56:10,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 09:56:10,830 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 134 transitions. [2018-09-28 09:56:10,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-28 09:56:10,831 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:10,831 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:10,831 INFO L423 AbstractCegarLoop]: === Iteration 7 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:10,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:10,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1965445341, now seen corresponding path program 1 times [2018-09-28 09:56:10,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:10,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:10,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:10,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:10,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:10,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:10,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:10,930 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:10,930 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:10,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:10,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:10,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:11,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:11,174 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:11,175 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2018-09-28 09:56:11,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 09:56:11,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 09:56:11,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2018-09-28 09:56:11,176 INFO L87 Difference]: Start difference. First operand 77 states and 134 transitions. Second operand 13 states. [2018-09-28 09:56:12,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:12,773 INFO L93 Difference]: Finished difference Result 150 states and 246 transitions. [2018-09-28 09:56:12,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-28 09:56:12,777 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 8 [2018-09-28 09:56:12,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:12,778 INFO L225 Difference]: With dead ends: 150 [2018-09-28 09:56:12,778 INFO L226 Difference]: Without dead ends: 148 [2018-09-28 09:56:12,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2018-09-28 09:56:12,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-28 09:56:12,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 106. [2018-09-28 09:56:12,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-28 09:56:12,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 185 transitions. [2018-09-28 09:56:12,827 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 185 transitions. Word has length 8 [2018-09-28 09:56:12,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:12,828 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 185 transitions. [2018-09-28 09:56:12,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 09:56:12,828 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 185 transitions. [2018-09-28 09:56:12,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-28 09:56:12,829 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:12,829 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:12,830 INFO L423 AbstractCegarLoop]: === Iteration 8 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:12,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:12,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1965445053, now seen corresponding path program 1 times [2018-09-28 09:56:12,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:12,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:12,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:12,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:12,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:12,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:12,939 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:12,939 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:12,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:12,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:12,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:13,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:13,263 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:13,263 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2018-09-28 09:56:13,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 09:56:13,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 09:56:13,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-28 09:56:13,264 INFO L87 Difference]: Start difference. First operand 106 states and 185 transitions. Second operand 13 states. [2018-09-28 09:56:14,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:14,825 INFO L93 Difference]: Finished difference Result 137 states and 241 transitions. [2018-09-28 09:56:14,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 09:56:14,825 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 8 [2018-09-28 09:56:14,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:14,826 INFO L225 Difference]: With dead ends: 137 [2018-09-28 09:56:14,826 INFO L226 Difference]: Without dead ends: 135 [2018-09-28 09:56:14,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2018-09-28 09:56:14,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-28 09:56:14,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 111. [2018-09-28 09:56:14,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-28 09:56:14,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 194 transitions. [2018-09-28 09:56:14,850 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 194 transitions. Word has length 8 [2018-09-28 09:56:14,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:14,851 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 194 transitions. [2018-09-28 09:56:14,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 09:56:14,851 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 194 transitions. [2018-09-28 09:56:14,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-28 09:56:14,852 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:14,852 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:14,852 INFO L423 AbstractCegarLoop]: === Iteration 9 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:14,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:14,853 INFO L82 PathProgramCache]: Analyzing trace with hash 2040447037, now seen corresponding path program 1 times [2018-09-28 09:56:14,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:14,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:14,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:14,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:14,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:14,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:15,233 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:15,233 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:15,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:15,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:15,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:15,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:15,427 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:15,427 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2018-09-28 09:56:15,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-28 09:56:15,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-28 09:56:15,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2018-09-28 09:56:15,428 INFO L87 Difference]: Start difference. First operand 111 states and 194 transitions. Second operand 12 states. [2018-09-28 09:56:16,273 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-28 09:56:16,618 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-09-28 09:56:17,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:17,148 INFO L93 Difference]: Finished difference Result 211 states and 359 transitions. [2018-09-28 09:56:17,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-28 09:56:17,148 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 8 [2018-09-28 09:56:17,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:17,150 INFO L225 Difference]: With dead ends: 211 [2018-09-28 09:56:17,150 INFO L226 Difference]: Without dead ends: 209 [2018-09-28 09:56:17,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=292, Invalid=764, Unknown=0, NotChecked=0, Total=1056 [2018-09-28 09:56:17,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-28 09:56:17,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 173. [2018-09-28 09:56:17,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-28 09:56:17,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 304 transitions. [2018-09-28 09:56:17,184 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 304 transitions. Word has length 8 [2018-09-28 09:56:17,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:17,184 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 304 transitions. [2018-09-28 09:56:17,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-28 09:56:17,184 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 304 transitions. [2018-09-28 09:56:17,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-28 09:56:17,185 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:17,185 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:17,186 INFO L423 AbstractCegarLoop]: === Iteration 10 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:17,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:17,186 INFO L82 PathProgramCache]: Analyzing trace with hash -84509544, now seen corresponding path program 1 times [2018-09-28 09:56:17,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:17,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:17,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:17,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:17,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:17,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:17,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:17,254 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:17,254 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:17,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:17,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:17,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:17,364 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:17,364 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-09-28 09:56:17,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 09:56:17,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 09:56:17,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-09-28 09:56:17,365 INFO L87 Difference]: Start difference. First operand 173 states and 304 transitions. Second operand 10 states. [2018-09-28 09:56:18,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:18,325 INFO L93 Difference]: Finished difference Result 246 states and 415 transitions. [2018-09-28 09:56:18,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-28 09:56:18,326 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 8 [2018-09-28 09:56:18,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:18,328 INFO L225 Difference]: With dead ends: 246 [2018-09-28 09:56:18,328 INFO L226 Difference]: Without dead ends: 245 [2018-09-28 09:56:18,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2018-09-28 09:56:18,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-09-28 09:56:18,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 201. [2018-09-28 09:56:18,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-28 09:56:18,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 358 transitions. [2018-09-28 09:56:18,367 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 358 transitions. Word has length 8 [2018-09-28 09:56:18,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:18,367 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 358 transitions. [2018-09-28 09:56:18,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 09:56:18,368 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 358 transitions. [2018-09-28 09:56:18,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-28 09:56:18,368 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:18,369 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:18,369 INFO L423 AbstractCegarLoop]: === Iteration 11 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:18,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:18,369 INFO L82 PathProgramCache]: Analyzing trace with hash -84508262, now seen corresponding path program 1 times [2018-09-28 09:56:18,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:18,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:18,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:18,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:18,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:18,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:18,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:18,506 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:18,506 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:18,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:18,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:18,548 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:18,548 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 09:56:18,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 09:56:18,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 09:56:18,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-28 09:56:18,549 INFO L87 Difference]: Start difference. First operand 201 states and 358 transitions. Second operand 7 states. [2018-09-28 09:56:18,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:18,929 INFO L93 Difference]: Finished difference Result 252 states and 436 transitions. [2018-09-28 09:56:18,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 09:56:18,931 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2018-09-28 09:56:18,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:18,932 INFO L225 Difference]: With dead ends: 252 [2018-09-28 09:56:18,933 INFO L226 Difference]: Without dead ends: 250 [2018-09-28 09:56:18,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2018-09-28 09:56:18,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2018-09-28 09:56:18,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 210. [2018-09-28 09:56:18,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-09-28 09:56:18,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 375 transitions. [2018-09-28 09:56:18,965 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 375 transitions. Word has length 8 [2018-09-28 09:56:18,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:18,965 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 375 transitions. [2018-09-28 09:56:18,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 09:56:18,965 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 375 transitions. [2018-09-28 09:56:18,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-28 09:56:18,966 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:18,966 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:18,966 INFO L423 AbstractCegarLoop]: === Iteration 12 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:18,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:18,967 INFO L82 PathProgramCache]: Analyzing trace with hash -75921375, now seen corresponding path program 1 times [2018-09-28 09:56:18,967 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:18,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:18,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:18,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:18,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:18,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:19,035 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:19,035 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:19,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:19,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:19,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:19,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:19,127 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:19,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-09-28 09:56:19,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 09:56:19,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 09:56:19,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-09-28 09:56:19,128 INFO L87 Difference]: Start difference. First operand 210 states and 375 transitions. Second operand 10 states. [2018-09-28 09:56:19,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:19,462 INFO L93 Difference]: Finished difference Result 260 states and 452 transitions. [2018-09-28 09:56:19,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 09:56:19,463 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 8 [2018-09-28 09:56:19,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:19,465 INFO L225 Difference]: With dead ends: 260 [2018-09-28 09:56:19,465 INFO L226 Difference]: Without dead ends: 259 [2018-09-28 09:56:19,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-28 09:56:19,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-09-28 09:56:19,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 229. [2018-09-28 09:56:19,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-09-28 09:56:19,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 409 transitions. [2018-09-28 09:56:19,502 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 409 transitions. Word has length 8 [2018-09-28 09:56:19,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:19,502 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 409 transitions. [2018-09-28 09:56:19,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 09:56:19,503 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 409 transitions. [2018-09-28 09:56:19,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-28 09:56:19,504 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:19,504 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:19,504 INFO L423 AbstractCegarLoop]: === Iteration 13 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:19,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:19,504 INFO L82 PathProgramCache]: Analyzing trace with hash -75920285, now seen corresponding path program 1 times [2018-09-28 09:56:19,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:19,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:19,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:19,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:19,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:19,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:19,582 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 09:56:19,582 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-28 09:56:19,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 09:56:19,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 09:56:19,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-28 09:56:19,583 INFO L87 Difference]: Start difference. First operand 229 states and 409 transitions. Second operand 7 states. [2018-09-28 09:56:20,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:20,204 INFO L93 Difference]: Finished difference Result 316 states and 557 transitions. [2018-09-28 09:56:20,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-28 09:56:20,204 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2018-09-28 09:56:20,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:20,206 INFO L225 Difference]: With dead ends: 316 [2018-09-28 09:56:20,207 INFO L226 Difference]: Without dead ends: 314 [2018-09-28 09:56:20,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2018-09-28 09:56:20,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2018-09-28 09:56:20,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 245. [2018-09-28 09:56:20,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-09-28 09:56:20,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 438 transitions. [2018-09-28 09:56:20,254 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 438 transitions. Word has length 8 [2018-09-28 09:56:20,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:20,254 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 438 transitions. [2018-09-28 09:56:20,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 09:56:20,255 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 438 transitions. [2018-09-28 09:56:20,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-28 09:56:20,255 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:20,256 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:20,256 INFO L423 AbstractCegarLoop]: === Iteration 14 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:20,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:20,256 INFO L82 PathProgramCache]: Analyzing trace with hash -35778354, now seen corresponding path program 1 times [2018-09-28 09:56:20,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:20,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:20,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:20,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:20,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:20,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:20,353 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:20,354 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:20,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:20,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:20,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:20,399 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:20,399 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 09:56:20,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 09:56:20,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 09:56:20,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-28 09:56:20,400 INFO L87 Difference]: Start difference. First operand 245 states and 438 transitions. Second operand 7 states. [2018-09-28 09:56:20,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:20,779 INFO L93 Difference]: Finished difference Result 428 states and 767 transitions. [2018-09-28 09:56:20,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 09:56:20,780 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2018-09-28 09:56:20,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:20,782 INFO L225 Difference]: With dead ends: 428 [2018-09-28 09:56:20,782 INFO L226 Difference]: Without dead ends: 426 [2018-09-28 09:56:20,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2018-09-28 09:56:20,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2018-09-28 09:56:20,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 345. [2018-09-28 09:56:20,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2018-09-28 09:56:20,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 622 transitions. [2018-09-28 09:56:20,844 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 622 transitions. Word has length 8 [2018-09-28 09:56:20,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:20,844 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 622 transitions. [2018-09-28 09:56:20,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 09:56:20,844 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 622 transitions. [2018-09-28 09:56:20,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 09:56:20,845 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:20,845 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:20,845 INFO L423 AbstractCegarLoop]: === Iteration 15 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:20,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:20,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1740000584, now seen corresponding path program 1 times [2018-09-28 09:56:20,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:20,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:20,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:20,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:20,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:21,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:21,084 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:21,085 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:21,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:21,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:21,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:21,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:21,194 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:21,194 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-09-28 09:56:21,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 09:56:21,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 09:56:21,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-09-28 09:56:21,195 INFO L87 Difference]: Start difference. First operand 345 states and 622 transitions. Second operand 10 states. [2018-09-28 09:56:22,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:22,228 INFO L93 Difference]: Finished difference Result 466 states and 826 transitions. [2018-09-28 09:56:22,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-28 09:56:22,228 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2018-09-28 09:56:22,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:22,231 INFO L225 Difference]: With dead ends: 466 [2018-09-28 09:56:22,231 INFO L226 Difference]: Without dead ends: 464 [2018-09-28 09:56:22,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2018-09-28 09:56:22,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2018-09-28 09:56:22,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 351. [2018-09-28 09:56:22,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-09-28 09:56:22,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 634 transitions. [2018-09-28 09:56:22,311 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 634 transitions. Word has length 11 [2018-09-28 09:56:22,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:22,311 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 634 transitions. [2018-09-28 09:56:22,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 09:56:22,311 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 634 transitions. [2018-09-28 09:56:22,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 09:56:22,312 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:22,312 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:22,313 INFO L423 AbstractCegarLoop]: === Iteration 16 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:22,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:22,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1701828094, now seen corresponding path program 1 times [2018-09-28 09:56:22,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:22,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:22,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:22,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:22,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:22,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:22,927 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:22,927 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:22,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:22,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:22,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:23,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:23,063 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-28 09:56:23,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 14 [2018-09-28 09:56:23,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 09:56:23,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 09:56:23,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2018-09-28 09:56:23,064 INFO L87 Difference]: Start difference. First operand 351 states and 634 transitions. Second operand 14 states. [2018-09-28 09:56:25,293 WARN L178 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2018-09-28 09:56:25,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:25,652 INFO L93 Difference]: Finished difference Result 859 states and 1521 transitions. [2018-09-28 09:56:25,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-28 09:56:25,653 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2018-09-28 09:56:25,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:25,656 INFO L225 Difference]: With dead ends: 859 [2018-09-28 09:56:25,656 INFO L226 Difference]: Without dead ends: 509 [2018-09-28 09:56:25,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=375, Invalid=1881, Unknown=0, NotChecked=0, Total=2256 [2018-09-28 09:56:25,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2018-09-28 09:56:25,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 388. [2018-09-28 09:56:25,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-09-28 09:56:25,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 697 transitions. [2018-09-28 09:56:25,744 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 697 transitions. Word has length 11 [2018-09-28 09:56:25,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:25,744 INFO L480 AbstractCegarLoop]: Abstraction has 388 states and 697 transitions. [2018-09-28 09:56:25,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 09:56:25,745 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 697 transitions. [2018-09-28 09:56:25,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 09:56:25,745 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:25,745 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:25,746 INFO L423 AbstractCegarLoop]: === Iteration 17 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:25,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:25,746 INFO L82 PathProgramCache]: Analyzing trace with hash 707064552, now seen corresponding path program 1 times [2018-09-28 09:56:25,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:25,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:25,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:25,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:25,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:25,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:25,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:25,915 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 09:56:25,915 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-28 09:56:25,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 09:56:25,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 09:56:25,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-09-28 09:56:25,916 INFO L87 Difference]: Start difference. First operand 388 states and 697 transitions. Second operand 8 states. [2018-09-28 09:56:26,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:26,567 INFO L93 Difference]: Finished difference Result 481 states and 848 transitions. [2018-09-28 09:56:26,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-28 09:56:26,567 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2018-09-28 09:56:26,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:26,570 INFO L225 Difference]: With dead ends: 481 [2018-09-28 09:56:26,570 INFO L226 Difference]: Without dead ends: 479 [2018-09-28 09:56:26,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2018-09-28 09:56:26,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2018-09-28 09:56:26,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 394. [2018-09-28 09:56:26,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2018-09-28 09:56:26,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 703 transitions. [2018-09-28 09:56:26,657 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 703 transitions. Word has length 11 [2018-09-28 09:56:26,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:26,657 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 703 transitions. [2018-09-28 09:56:26,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 09:56:26,658 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 703 transitions. [2018-09-28 09:56:26,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 09:56:26,658 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:26,658 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:26,659 INFO L423 AbstractCegarLoop]: === Iteration 18 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:26,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:26,659 INFO L82 PathProgramCache]: Analyzing trace with hash 739509354, now seen corresponding path program 1 times [2018-09-28 09:56:26,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:26,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:26,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:26,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:26,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:26,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:26,798 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:26,798 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:26,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:26,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:26,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:26,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:26,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2018-09-28 09:56:26,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 09:56:26,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 09:56:26,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-28 09:56:26,927 INFO L87 Difference]: Start difference. First operand 394 states and 703 transitions. Second operand 13 states. [2018-09-28 09:56:27,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:27,886 INFO L93 Difference]: Finished difference Result 952 states and 1676 transitions. [2018-09-28 09:56:27,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-28 09:56:27,886 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2018-09-28 09:56:27,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:27,889 INFO L225 Difference]: With dead ends: 952 [2018-09-28 09:56:27,889 INFO L226 Difference]: Without dead ends: 559 [2018-09-28 09:56:27,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2018-09-28 09:56:27,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2018-09-28 09:56:27,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 473. [2018-09-28 09:56:27,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 473 states. [2018-09-28 09:56:27,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 835 transitions. [2018-09-28 09:56:27,978 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 835 transitions. Word has length 11 [2018-09-28 09:56:27,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:27,978 INFO L480 AbstractCegarLoop]: Abstraction has 473 states and 835 transitions. [2018-09-28 09:56:27,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 09:56:27,978 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 835 transitions. [2018-09-28 09:56:27,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 09:56:27,979 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:27,979 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:27,980 INFO L423 AbstractCegarLoop]: === Iteration 19 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:27,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:27,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1106731073, now seen corresponding path program 1 times [2018-09-28 09:56:27,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:27,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:27,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:27,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:27,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:28,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:28,101 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 09:56:28,101 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-28 09:56:28,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 09:56:28,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 09:56:28,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-09-28 09:56:28,102 INFO L87 Difference]: Start difference. First operand 473 states and 835 transitions. Second operand 8 states. [2018-09-28 09:56:28,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:28,479 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2018-09-28 09:56:28,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-28 09:56:28,484 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2018-09-28 09:56:28,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:28,487 INFO L225 Difference]: With dead ends: 524 [2018-09-28 09:56:28,487 INFO L226 Difference]: Without dead ends: 522 [2018-09-28 09:56:28,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-09-28 09:56:28,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2018-09-28 09:56:28,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 485. [2018-09-28 09:56:28,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 485 states. [2018-09-28 09:56:28,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 855 transitions. [2018-09-28 09:56:28,597 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 855 transitions. Word has length 11 [2018-09-28 09:56:28,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:28,597 INFO L480 AbstractCegarLoop]: Abstraction has 485 states and 855 transitions. [2018-09-28 09:56:28,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 09:56:28,598 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 855 transitions. [2018-09-28 09:56:28,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 09:56:28,598 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:28,598 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:28,599 INFO L423 AbstractCegarLoop]: === Iteration 20 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:28,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:28,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1098144186, now seen corresponding path program 1 times [2018-09-28 09:56:28,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:28,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:28,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:28,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:28,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:28,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:29,077 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:29,077 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:29,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:29,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:29,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:29,475 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:29,475 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-09-28 09:56:29,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 09:56:29,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 09:56:29,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-09-28 09:56:29,476 INFO L87 Difference]: Start difference. First operand 485 states and 855 transitions. Second operand 9 states. [2018-09-28 09:56:30,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:30,559 INFO L93 Difference]: Finished difference Result 556 states and 964 transitions. [2018-09-28 09:56:30,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-28 09:56:30,567 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2018-09-28 09:56:30,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:30,569 INFO L225 Difference]: With dead ends: 556 [2018-09-28 09:56:30,569 INFO L226 Difference]: Without dead ends: 554 [2018-09-28 09:56:30,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2018-09-28 09:56:30,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2018-09-28 09:56:30,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 489. [2018-09-28 09:56:30,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2018-09-28 09:56:30,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 861 transitions. [2018-09-28 09:56:30,663 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 861 transitions. Word has length 11 [2018-09-28 09:56:30,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:30,663 INFO L480 AbstractCegarLoop]: Abstraction has 489 states and 861 transitions. [2018-09-28 09:56:30,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 09:56:30,663 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 861 transitions. [2018-09-28 09:56:30,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 09:56:30,664 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:30,664 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:30,664 INFO L423 AbstractCegarLoop]: === Iteration 21 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:30,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:30,665 INFO L82 PathProgramCache]: Analyzing trace with hash -772910566, now seen corresponding path program 1 times [2018-09-28 09:56:30,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:30,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:30,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:30,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:30,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:30,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:30,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:30,733 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:30,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:30,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:30,872 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:30,872 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 12 [2018-09-28 09:56:30,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 09:56:30,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 09:56:30,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-09-28 09:56:30,873 INFO L87 Difference]: Start difference. First operand 489 states and 861 transitions. Second operand 13 states. [2018-09-28 09:56:31,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:31,956 INFO L93 Difference]: Finished difference Result 631 states and 1077 transitions. [2018-09-28 09:56:31,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-28 09:56:31,956 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2018-09-28 09:56:31,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:31,959 INFO L225 Difference]: With dead ends: 631 [2018-09-28 09:56:31,959 INFO L226 Difference]: Without dead ends: 629 [2018-09-28 09:56:31,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2018-09-28 09:56:31,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2018-09-28 09:56:32,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 513. [2018-09-28 09:56:32,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2018-09-28 09:56:32,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 904 transitions. [2018-09-28 09:56:32,074 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 904 transitions. Word has length 11 [2018-09-28 09:56:32,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:32,074 INFO L480 AbstractCegarLoop]: Abstraction has 513 states and 904 transitions. [2018-09-28 09:56:32,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 09:56:32,074 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 904 transitions. [2018-09-28 09:56:32,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 09:56:32,075 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:32,075 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:32,075 INFO L423 AbstractCegarLoop]: === Iteration 22 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:32,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:32,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1674153000, now seen corresponding path program 2 times [2018-09-28 09:56:32,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:32,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:32,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:32,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:32,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:32,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:32,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:32,241 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:32,241 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:32,251 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 09:56:32,260 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 09:56:32,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:56:32,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:32,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:32,284 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:32,284 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 09:56:32,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 09:56:32,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 09:56:32,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-28 09:56:32,285 INFO L87 Difference]: Start difference. First operand 513 states and 904 transitions. Second operand 7 states. [2018-09-28 09:56:32,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:32,828 INFO L93 Difference]: Finished difference Result 601 states and 1040 transitions. [2018-09-28 09:56:32,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-28 09:56:32,831 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 09:56:32,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:32,833 INFO L225 Difference]: With dead ends: 601 [2018-09-28 09:56:32,833 INFO L226 Difference]: Without dead ends: 599 [2018-09-28 09:56:32,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2018-09-28 09:56:32,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2018-09-28 09:56:32,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 509. [2018-09-28 09:56:32,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 509 states. [2018-09-28 09:56:32,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 898 transitions. [2018-09-28 09:56:32,951 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 898 transitions. Word has length 11 [2018-09-28 09:56:32,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:32,951 INFO L480 AbstractCegarLoop]: Abstraction has 509 states and 898 transitions. [2018-09-28 09:56:32,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 09:56:32,951 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 898 transitions. [2018-09-28 09:56:32,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 09:56:32,952 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:32,952 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:32,952 INFO L423 AbstractCegarLoop]: === Iteration 23 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:32,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:32,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1682742259, now seen corresponding path program 1 times [2018-09-28 09:56:32,952 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:32,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:32,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:32,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:56:32,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:32,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:33,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:33,015 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:33,015 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:33,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:33,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:33,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:33,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:33,064 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:33,064 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 09:56:33,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 09:56:33,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 09:56:33,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-28 09:56:33,065 INFO L87 Difference]: Start difference. First operand 509 states and 898 transitions. Second operand 7 states. [2018-09-28 09:56:33,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:33,576 INFO L93 Difference]: Finished difference Result 624 states and 1088 transitions. [2018-09-28 09:56:33,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-28 09:56:33,576 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 09:56:33,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:33,579 INFO L225 Difference]: With dead ends: 624 [2018-09-28 09:56:33,579 INFO L226 Difference]: Without dead ends: 622 [2018-09-28 09:56:33,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2018-09-28 09:56:33,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2018-09-28 09:56:33,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 538. [2018-09-28 09:56:33,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 538 states. [2018-09-28 09:56:33,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 949 transitions. [2018-09-28 09:56:33,675 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 949 transitions. Word has length 11 [2018-09-28 09:56:33,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:33,675 INFO L480 AbstractCegarLoop]: Abstraction has 538 states and 949 transitions. [2018-09-28 09:56:33,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 09:56:33,675 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 949 transitions. [2018-09-28 09:56:33,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 09:56:33,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:33,676 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:33,676 INFO L423 AbstractCegarLoop]: === Iteration 24 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:33,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:33,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1927251354, now seen corresponding path program 1 times [2018-09-28 09:56:33,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:33,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:33,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:33,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:33,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:33,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:33,892 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:33,892 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:33,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:33,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:33,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:33,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:33,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:33,928 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 09:56:33,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 09:56:33,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 09:56:33,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-28 09:56:33,929 INFO L87 Difference]: Start difference. First operand 538 states and 949 transitions. Second operand 7 states. [2018-09-28 09:56:34,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:34,321 INFO L93 Difference]: Finished difference Result 584 states and 1012 transitions. [2018-09-28 09:56:34,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 09:56:34,321 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 09:56:34,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:34,323 INFO L225 Difference]: With dead ends: 584 [2018-09-28 09:56:34,323 INFO L226 Difference]: Without dead ends: 582 [2018-09-28 09:56:34,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-09-28 09:56:34,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2018-09-28 09:56:34,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 543. [2018-09-28 09:56:34,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2018-09-28 09:56:34,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 956 transitions. [2018-09-28 09:56:34,418 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 956 transitions. Word has length 11 [2018-09-28 09:56:34,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:34,418 INFO L480 AbstractCegarLoop]: Abstraction has 543 states and 956 transitions. [2018-09-28 09:56:34,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 09:56:34,419 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 956 transitions. [2018-09-28 09:56:34,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 09:56:34,419 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:34,419 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:34,420 INFO L423 AbstractCegarLoop]: === Iteration 25 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:34,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:34,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1918662095, now seen corresponding path program 1 times [2018-09-28 09:56:34,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:34,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:34,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:34,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:34,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:34,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:34,581 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:34,581 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:34,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:34,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:34,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:34,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:34,622 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 09:56:34,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 09:56:34,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 09:56:34,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-28 09:56:34,623 INFO L87 Difference]: Start difference. First operand 543 states and 956 transitions. Second operand 7 states. [2018-09-28 09:56:35,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:35,071 INFO L93 Difference]: Finished difference Result 618 states and 1074 transitions. [2018-09-28 09:56:35,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-28 09:56:35,072 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 09:56:35,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:35,074 INFO L225 Difference]: With dead ends: 618 [2018-09-28 09:56:35,074 INFO L226 Difference]: Without dead ends: 616 [2018-09-28 09:56:35,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2018-09-28 09:56:35,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2018-09-28 09:56:35,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 529. [2018-09-28 09:56:35,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 529 states. [2018-09-28 09:56:35,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 929 transitions. [2018-09-28 09:56:35,175 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 929 transitions. Word has length 11 [2018-09-28 09:56:35,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:35,175 INFO L480 AbstractCegarLoop]: Abstraction has 529 states and 929 transitions. [2018-09-28 09:56:35,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 09:56:35,176 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 929 transitions. [2018-09-28 09:56:35,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 09:56:35,176 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:35,176 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:35,177 INFO L423 AbstractCegarLoop]: === Iteration 26 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:35,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:35,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1878520164, now seen corresponding path program 1 times [2018-09-28 09:56:35,177 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:35,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:35,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:35,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:35,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:35,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:35,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:35,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:35,257 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:35,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:35,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:35,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:35,299 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:35,299 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 09:56:35,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 09:56:35,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 09:56:35,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-28 09:56:35,300 INFO L87 Difference]: Start difference. First operand 529 states and 929 transitions. Second operand 7 states. [2018-09-28 09:56:35,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:35,722 INFO L93 Difference]: Finished difference Result 613 states and 1066 transitions. [2018-09-28 09:56:35,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-28 09:56:35,723 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 09:56:35,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:35,725 INFO L225 Difference]: With dead ends: 613 [2018-09-28 09:56:35,725 INFO L226 Difference]: Without dead ends: 611 [2018-09-28 09:56:35,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2018-09-28 09:56:35,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2018-09-28 09:56:35,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 523. [2018-09-28 09:56:35,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 523 states. [2018-09-28 09:56:35,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 914 transitions. [2018-09-28 09:56:35,833 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 914 transitions. Word has length 11 [2018-09-28 09:56:35,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:35,833 INFO L480 AbstractCegarLoop]: Abstraction has 523 states and 914 transitions. [2018-09-28 09:56:35,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 09:56:35,833 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 914 transitions. [2018-09-28 09:56:35,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-28 09:56:35,834 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:35,834 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:35,834 INFO L423 AbstractCegarLoop]: === Iteration 27 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:35,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:35,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1730497723, now seen corresponding path program 1 times [2018-09-28 09:56:35,835 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:35,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:35,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:35,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:35,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:35,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:35,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:35,919 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:35,919 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:35,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:35,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:36,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:36,233 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:36,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2018-09-28 09:56:36,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-28 09:56:36,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-28 09:56:36,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2018-09-28 09:56:36,234 INFO L87 Difference]: Start difference. First operand 523 states and 914 transitions. Second operand 12 states. [2018-09-28 09:56:37,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:37,433 INFO L93 Difference]: Finished difference Result 875 states and 1523 transitions. [2018-09-28 09:56:37,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-28 09:56:37,433 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-28 09:56:37,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:37,437 INFO L225 Difference]: With dead ends: 875 [2018-09-28 09:56:37,437 INFO L226 Difference]: Without dead ends: 873 [2018-09-28 09:56:37,438 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2018-09-28 09:56:37,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2018-09-28 09:56:37,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 651. [2018-09-28 09:56:37,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2018-09-28 09:56:37,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1146 transitions. [2018-09-28 09:56:37,548 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1146 transitions. Word has length 12 [2018-09-28 09:56:37,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:37,549 INFO L480 AbstractCegarLoop]: Abstraction has 651 states and 1146 transitions. [2018-09-28 09:56:37,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-28 09:56:37,549 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1146 transitions. [2018-09-28 09:56:37,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-28 09:56:37,549 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:37,549 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:37,550 INFO L423 AbstractCegarLoop]: === Iteration 28 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:37,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:37,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1895489947, now seen corresponding path program 1 times [2018-09-28 09:56:37,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:37,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:37,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:37,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:37,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:37,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:37,630 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:37,630 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:37,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:37,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:37,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:37,741 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:37,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-09-28 09:56:37,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 09:56:37,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 09:56:37,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-09-28 09:56:37,742 INFO L87 Difference]: Start difference. First operand 651 states and 1146 transitions. Second operand 13 states. [2018-09-28 09:56:39,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:39,169 INFO L93 Difference]: Finished difference Result 1281 states and 2254 transitions. [2018-09-28 09:56:39,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-28 09:56:39,169 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-09-28 09:56:39,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:39,174 INFO L225 Difference]: With dead ends: 1281 [2018-09-28 09:56:39,174 INFO L226 Difference]: Without dead ends: 1279 [2018-09-28 09:56:39,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=260, Invalid=1000, Unknown=0, NotChecked=0, Total=1260 [2018-09-28 09:56:39,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2018-09-28 09:56:39,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 923. [2018-09-28 09:56:39,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 923 states. [2018-09-28 09:56:39,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1627 transitions. [2018-09-28 09:56:39,349 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1627 transitions. Word has length 12 [2018-09-28 09:56:39,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:39,349 INFO L480 AbstractCegarLoop]: Abstraction has 923 states and 1627 transitions. [2018-09-28 09:56:39,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 09:56:39,349 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1627 transitions. [2018-09-28 09:56:39,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 09:56:39,350 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:39,350 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:39,350 INFO L423 AbstractCegarLoop]: === Iteration 29 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:39,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:39,351 INFO L82 PathProgramCache]: Analyzing trace with hash -397030605, now seen corresponding path program 1 times [2018-09-28 09:56:39,351 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:39,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:39,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:39,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:39,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:39,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:39,445 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:39,445 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:39,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:39,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:39,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:39,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:39,510 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:39,510 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-09-28 09:56:39,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 09:56:39,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 09:56:39,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-28 09:56:39,511 INFO L87 Difference]: Start difference. First operand 923 states and 1627 transitions. Second operand 11 states. [2018-09-28 09:56:40,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:40,225 INFO L93 Difference]: Finished difference Result 1054 states and 1838 transitions. [2018-09-28 09:56:40,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-28 09:56:40,226 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2018-09-28 09:56:40,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:40,229 INFO L225 Difference]: With dead ends: 1054 [2018-09-28 09:56:40,230 INFO L226 Difference]: Without dead ends: 1052 [2018-09-28 09:56:40,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2018-09-28 09:56:40,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2018-09-28 09:56:40,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 933. [2018-09-28 09:56:40,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 933 states. [2018-09-28 09:56:40,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1644 transitions. [2018-09-28 09:56:40,410 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1644 transitions. Word has length 14 [2018-09-28 09:56:40,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:40,411 INFO L480 AbstractCegarLoop]: Abstraction has 933 states and 1644 transitions. [2018-09-28 09:56:40,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 09:56:40,411 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1644 transitions. [2018-09-28 09:56:40,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 09:56:40,412 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:40,412 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:40,412 INFO L423 AbstractCegarLoop]: === Iteration 30 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:40,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:40,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1593749093, now seen corresponding path program 2 times [2018-09-28 09:56:40,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:40,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:40,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:40,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:40,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:40,514 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:40,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:40,521 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 09:56:40,529 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 09:56:40,529 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:56:40,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:40,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:40,619 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:40,620 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2018-09-28 09:56:40,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-28 09:56:40,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-28 09:56:40,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2018-09-28 09:56:40,620 INFO L87 Difference]: Start difference. First operand 933 states and 1644 transitions. Second operand 12 states. [2018-09-28 09:56:41,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:41,937 INFO L93 Difference]: Finished difference Result 1125 states and 1938 transitions. [2018-09-28 09:56:41,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-28 09:56:41,937 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2018-09-28 09:56:41,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:41,941 INFO L225 Difference]: With dead ends: 1125 [2018-09-28 09:56:41,941 INFO L226 Difference]: Without dead ends: 1123 [2018-09-28 09:56:41,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2018-09-28 09:56:41,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2018-09-28 09:56:42,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 923. [2018-09-28 09:56:42,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 923 states. [2018-09-28 09:56:42,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1627 transitions. [2018-09-28 09:56:42,122 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1627 transitions. Word has length 14 [2018-09-28 09:56:42,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:42,122 INFO L480 AbstractCegarLoop]: Abstraction has 923 states and 1627 transitions. [2018-09-28 09:56:42,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-28 09:56:42,122 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1627 transitions. [2018-09-28 09:56:42,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 09:56:42,123 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:42,123 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:42,123 INFO L423 AbstractCegarLoop]: === Iteration 31 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:42,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:42,123 INFO L82 PathProgramCache]: Analyzing trace with hash -213121378, now seen corresponding path program 1 times [2018-09-28 09:56:42,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:42,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:42,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:42,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:56:42,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:42,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:42,714 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:42,715 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:42,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:42,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:42,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:42,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:42,987 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:42,987 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2018-09-28 09:56:42,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 09:56:42,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 09:56:42,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-28 09:56:42,988 INFO L87 Difference]: Start difference. First operand 923 states and 1627 transitions. Second operand 14 states. [2018-09-28 09:56:44,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:44,440 INFO L93 Difference]: Finished difference Result 1125 states and 1949 transitions. [2018-09-28 09:56:44,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-28 09:56:44,441 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-28 09:56:44,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:44,444 INFO L225 Difference]: With dead ends: 1125 [2018-09-28 09:56:44,445 INFO L226 Difference]: Without dead ends: 1123 [2018-09-28 09:56:44,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=266, Invalid=1066, Unknown=0, NotChecked=0, Total=1332 [2018-09-28 09:56:44,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2018-09-28 09:56:44,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 919. [2018-09-28 09:56:44,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 919 states. [2018-09-28 09:56:44,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1620 transitions. [2018-09-28 09:56:44,630 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1620 transitions. Word has length 14 [2018-09-28 09:56:44,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:44,631 INFO L480 AbstractCegarLoop]: Abstraction has 919 states and 1620 transitions. [2018-09-28 09:56:44,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 09:56:44,631 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1620 transitions. [2018-09-28 09:56:44,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 09:56:44,631 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:44,632 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:44,632 INFO L423 AbstractCegarLoop]: === Iteration 32 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:44,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:44,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1838595071, now seen corresponding path program 1 times [2018-09-28 09:56:44,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:44,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:44,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:44,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:44,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:44,810 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:44,810 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:44,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:44,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:44,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:44,873 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2018-09-28 09:56:44,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-28 09:56:44,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-28 09:56:44,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-09-28 09:56:44,874 INFO L87 Difference]: Start difference. First operand 919 states and 1620 transitions. Second operand 12 states. [2018-09-28 09:56:45,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:45,716 INFO L93 Difference]: Finished difference Result 1117 states and 1948 transitions. [2018-09-28 09:56:45,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-28 09:56:45,716 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2018-09-28 09:56:45,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:45,720 INFO L225 Difference]: With dead ends: 1117 [2018-09-28 09:56:45,720 INFO L226 Difference]: Without dead ends: 1115 [2018-09-28 09:56:45,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2018-09-28 09:56:45,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2018-09-28 09:56:45,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 883. [2018-09-28 09:56:45,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2018-09-28 09:56:45,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1560 transitions. [2018-09-28 09:56:45,903 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1560 transitions. Word has length 14 [2018-09-28 09:56:45,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:45,904 INFO L480 AbstractCegarLoop]: Abstraction has 883 states and 1560 transitions. [2018-09-28 09:56:45,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-28 09:56:45,904 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1560 transitions. [2018-09-28 09:56:45,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 09:56:45,904 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:45,905 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:45,905 INFO L423 AbstractCegarLoop]: === Iteration 33 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:45,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:45,905 INFO L82 PathProgramCache]: Analyzing trace with hash -47479579, now seen corresponding path program 1 times [2018-09-28 09:56:45,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:45,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:45,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:45,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:45,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:45,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:46,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:46,030 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:46,030 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:46,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:46,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:46,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:46,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:46,096 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:46,097 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-09-28 09:56:46,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 09:56:46,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 09:56:46,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-28 09:56:46,097 INFO L87 Difference]: Start difference. First operand 883 states and 1560 transitions. Second operand 11 states. [2018-09-28 09:56:47,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:47,033 INFO L93 Difference]: Finished difference Result 995 states and 1722 transitions. [2018-09-28 09:56:47,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-28 09:56:47,033 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2018-09-28 09:56:47,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:47,037 INFO L225 Difference]: With dead ends: 995 [2018-09-28 09:56:47,037 INFO L226 Difference]: Without dead ends: 993 [2018-09-28 09:56:47,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2018-09-28 09:56:47,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2018-09-28 09:56:47,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 877. [2018-09-28 09:56:47,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 877 states. [2018-09-28 09:56:47,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1548 transitions. [2018-09-28 09:56:47,214 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1548 transitions. Word has length 14 [2018-09-28 09:56:47,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:47,215 INFO L480 AbstractCegarLoop]: Abstraction has 877 states and 1548 transitions. [2018-09-28 09:56:47,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 09:56:47,215 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1548 transitions. [2018-09-28 09:56:47,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 09:56:47,216 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:47,216 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2018-09-28 09:56:47,216 INFO L423 AbstractCegarLoop]: === Iteration 34 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:47,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:47,217 INFO L82 PathProgramCache]: Analyzing trace with hash 2027388784, now seen corresponding path program 1 times [2018-09-28 09:56:47,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:47,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:47,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:47,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:47,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:47,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:47,388 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:47,388 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:47,388 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:47,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:47,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:47,541 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:47,563 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:47,563 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2018-09-28 09:56:47,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-28 09:56:47,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-28 09:56:47,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2018-09-28 09:56:47,564 INFO L87 Difference]: Start difference. First operand 877 states and 1548 transitions. Second operand 17 states. [2018-09-28 09:56:49,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:49,968 INFO L93 Difference]: Finished difference Result 2105 states and 3670 transitions. [2018-09-28 09:56:49,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-28 09:56:49,968 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 15 [2018-09-28 09:56:49,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:49,973 INFO L225 Difference]: With dead ends: 2105 [2018-09-28 09:56:49,973 INFO L226 Difference]: Without dead ends: 1229 [2018-09-28 09:56:49,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=635, Invalid=2557, Unknown=0, NotChecked=0, Total=3192 [2018-09-28 09:56:49,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2018-09-28 09:56:50,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1014. [2018-09-28 09:56:50,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1014 states. [2018-09-28 09:56:50,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 1752 transitions. [2018-09-28 09:56:50,193 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 1752 transitions. Word has length 15 [2018-09-28 09:56:50,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:50,193 INFO L480 AbstractCegarLoop]: Abstraction has 1014 states and 1752 transitions. [2018-09-28 09:56:50,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-28 09:56:50,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 1752 transitions. [2018-09-28 09:56:50,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 09:56:50,194 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:50,194 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:50,194 INFO L423 AbstractCegarLoop]: === Iteration 35 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:50,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:50,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1084233543, now seen corresponding path program 1 times [2018-09-28 09:56:50,195 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:50,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:50,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:50,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:50,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:50,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:50,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:50,356 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:50,357 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:50,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:50,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:50,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:50,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:50,488 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:50,488 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2018-09-28 09:56:50,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 09:56:50,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 09:56:50,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2018-09-28 09:56:50,489 INFO L87 Difference]: Start difference. First operand 1014 states and 1752 transitions. Second operand 15 states. [2018-09-28 09:56:51,245 WARN L178 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2018-09-28 09:56:52,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:52,948 INFO L93 Difference]: Finished difference Result 2110 states and 3623 transitions. [2018-09-28 09:56:52,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-28 09:56:52,948 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-28 09:56:52,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:52,953 INFO L225 Difference]: With dead ends: 2110 [2018-09-28 09:56:52,953 INFO L226 Difference]: Without dead ends: 1097 [2018-09-28 09:56:52,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=426, Invalid=2024, Unknown=0, NotChecked=0, Total=2450 [2018-09-28 09:56:52,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2018-09-28 09:56:53,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 951. [2018-09-28 09:56:53,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 951 states. [2018-09-28 09:56:53,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1643 transitions. [2018-09-28 09:56:53,159 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 1643 transitions. Word has length 15 [2018-09-28 09:56:53,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:53,159 INFO L480 AbstractCegarLoop]: Abstraction has 951 states and 1643 transitions. [2018-09-28 09:56:53,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 09:56:53,159 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 1643 transitions. [2018-09-28 09:56:53,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 09:56:53,160 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:53,160 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:53,160 INFO L423 AbstractCegarLoop]: === Iteration 36 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:53,160 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:53,161 INFO L82 PathProgramCache]: Analyzing trace with hash -185533858, now seen corresponding path program 1 times [2018-09-28 09:56:53,161 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:53,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:53,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:53,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:53,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:53,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:53,289 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:53,290 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:53,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:53,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:53,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:53,396 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:53,397 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2018-09-28 09:56:53,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 09:56:53,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 09:56:53,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2018-09-28 09:56:53,397 INFO L87 Difference]: Start difference. First operand 951 states and 1643 transitions. Second operand 15 states. [2018-09-28 09:56:55,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:55,722 INFO L93 Difference]: Finished difference Result 2832 states and 4780 transitions. [2018-09-28 09:56:55,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-28 09:56:55,723 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-28 09:56:55,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:55,729 INFO L225 Difference]: With dead ends: 2832 [2018-09-28 09:56:55,729 INFO L226 Difference]: Without dead ends: 1867 [2018-09-28 09:56:55,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=702, Invalid=3330, Unknown=0, NotChecked=0, Total=4032 [2018-09-28 09:56:55,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2018-09-28 09:56:56,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1571. [2018-09-28 09:56:56,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1571 states. [2018-09-28 09:56:56,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 2660 transitions. [2018-09-28 09:56:56,107 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 2660 transitions. Word has length 15 [2018-09-28 09:56:56,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:56,107 INFO L480 AbstractCegarLoop]: Abstraction has 1571 states and 2660 transitions. [2018-09-28 09:56:56,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 09:56:56,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 2660 transitions. [2018-09-28 09:56:56,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 09:56:56,108 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:56,109 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:56,109 INFO L423 AbstractCegarLoop]: === Iteration 37 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:56,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:56,109 INFO L82 PathProgramCache]: Analyzing trace with hash -497943192, now seen corresponding path program 1 times [2018-09-28 09:56:56,109 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:56,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:56,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:56,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:56,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:56,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:56,194 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:56,194 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:56,194 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:56,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:56,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:56,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:56,279 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-28 09:56:56,300 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:56,301 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-28 09:56:56,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 09:56:56,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 09:56:56,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2018-09-28 09:56:56,301 INFO L87 Difference]: Start difference. First operand 1571 states and 2660 transitions. Second operand 15 states. [2018-09-28 09:56:59,880 WARN L178 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2018-09-28 09:57:00,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:57:00,754 INFO L93 Difference]: Finished difference Result 4461 states and 7467 transitions. [2018-09-28 09:57:00,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-28 09:57:00,754 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-28 09:57:00,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:57:00,785 INFO L225 Difference]: With dead ends: 4461 [2018-09-28 09:57:00,785 INFO L226 Difference]: Without dead ends: 2887 [2018-09-28 09:57:00,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2031 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1321, Invalid=5159, Unknown=0, NotChecked=0, Total=6480 [2018-09-28 09:57:00,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2018-09-28 09:57:01,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 2284. [2018-09-28 09:57:01,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2284 states. [2018-09-28 09:57:01,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 3759 transitions. [2018-09-28 09:57:01,739 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 3759 transitions. Word has length 15 [2018-09-28 09:57:01,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:57:01,739 INFO L480 AbstractCegarLoop]: Abstraction has 2284 states and 3759 transitions. [2018-09-28 09:57:01,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 09:57:01,739 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 3759 transitions. [2018-09-28 09:57:01,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 09:57:01,741 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:57:01,741 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2018-09-28 09:57:01,741 INFO L423 AbstractCegarLoop]: === Iteration 38 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:57:01,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:57:01,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1957708543, now seen corresponding path program 1 times [2018-09-28 09:57:01,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:57:01,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:57:01,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:01,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:01,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:01,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:02,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:02,779 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:57:02,779 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:57:02,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:02,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:57:03,129 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-28 09:57:03,177 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:57:03,177 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-28 09:57:03,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-28 09:57:03,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-28 09:57:03,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2018-09-28 09:57:03,178 INFO L87 Difference]: Start difference. First operand 2284 states and 3759 transitions. Second operand 16 states. [2018-09-28 09:57:06,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:57:06,939 INFO L93 Difference]: Finished difference Result 3903 states and 6372 transitions. [2018-09-28 09:57:06,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-28 09:57:06,939 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-28 09:57:06,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:57:06,946 INFO L225 Difference]: With dead ends: 3903 [2018-09-28 09:57:06,947 INFO L226 Difference]: Without dead ends: 3227 [2018-09-28 09:57:06,951 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2797 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1137, Invalid=6873, Unknown=0, NotChecked=0, Total=8010 [2018-09-28 09:57:06,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3227 states. [2018-09-28 09:57:07,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3227 to 2428. [2018-09-28 09:57:07,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2428 states. [2018-09-28 09:57:07,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2428 states to 2428 states and 4065 transitions. [2018-09-28 09:57:07,637 INFO L78 Accepts]: Start accepts. Automaton has 2428 states and 4065 transitions. Word has length 15 [2018-09-28 09:57:07,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:57:07,637 INFO L480 AbstractCegarLoop]: Abstraction has 2428 states and 4065 transitions. [2018-09-28 09:57:07,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-28 09:57:07,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2428 states and 4065 transitions. [2018-09-28 09:57:07,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 09:57:07,639 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:57:07,639 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:57:07,639 INFO L423 AbstractCegarLoop]: === Iteration 39 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:57:07,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:57:07,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1386290021, now seen corresponding path program 1 times [2018-09-28 09:57:07,640 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:57:07,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:57:07,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:07,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:07,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:07,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:08,279 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:57:08,279 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:57:08,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:08,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:08,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:57:08,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:08,387 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:57:08,387 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-28 09:57:08,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 09:57:08,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 09:57:08,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2018-09-28 09:57:08,388 INFO L87 Difference]: Start difference. First operand 2428 states and 4065 transitions. Second operand 15 states. [2018-09-28 09:57:11,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:57:11,081 INFO L93 Difference]: Finished difference Result 5427 states and 9046 transitions. [2018-09-28 09:57:11,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-28 09:57:11,082 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-28 09:57:11,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:57:11,090 INFO L225 Difference]: With dead ends: 5427 [2018-09-28 09:57:11,090 INFO L226 Difference]: Without dead ends: 2851 [2018-09-28 09:57:11,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=632, Invalid=2790, Unknown=0, NotChecked=0, Total=3422 [2018-09-28 09:57:11,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2018-09-28 09:57:11,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2500. [2018-09-28 09:57:11,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2500 states. [2018-09-28 09:57:11,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2500 states to 2500 states and 4177 transitions. [2018-09-28 09:57:11,691 INFO L78 Accepts]: Start accepts. Automaton has 2500 states and 4177 transitions. Word has length 15 [2018-09-28 09:57:11,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:57:11,691 INFO L480 AbstractCegarLoop]: Abstraction has 2500 states and 4177 transitions. [2018-09-28 09:57:11,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 09:57:11,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2500 states and 4177 transitions. [2018-09-28 09:57:11,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 09:57:11,692 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:57:11,693 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2018-09-28 09:57:11,693 INFO L423 AbstractCegarLoop]: === Iteration 40 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:57:11,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:57:11,693 INFO L82 PathProgramCache]: Analyzing trace with hash -38293542, now seen corresponding path program 1 times [2018-09-28 09:57:11,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:57:11,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:57:11,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:11,694 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:11,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:11,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:11,800 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:11,800 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:57:11,800 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:57:11,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:11,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:11,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:57:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-28 09:57:11,899 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:57:11,899 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2018-09-28 09:57:11,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 09:57:11,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 09:57:11,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2018-09-28 09:57:11,900 INFO L87 Difference]: Start difference. First operand 2500 states and 4177 transitions. Second operand 15 states. [2018-09-28 09:57:14,473 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2018-09-28 09:57:15,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:57:15,049 INFO L93 Difference]: Finished difference Result 5837 states and 9708 transitions. [2018-09-28 09:57:15,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-28 09:57:15,050 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-28 09:57:15,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:57:15,057 INFO L225 Difference]: With dead ends: 5837 [2018-09-28 09:57:15,057 INFO L226 Difference]: Without dead ends: 3072 [2018-09-28 09:57:15,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=785, Invalid=3247, Unknown=0, NotChecked=0, Total=4032 [2018-09-28 09:57:15,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2018-09-28 09:57:15,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 2605. [2018-09-28 09:57:15,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2605 states. [2018-09-28 09:57:15,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2605 states to 2605 states and 4349 transitions. [2018-09-28 09:57:15,860 INFO L78 Accepts]: Start accepts. Automaton has 2605 states and 4349 transitions. Word has length 15 [2018-09-28 09:57:15,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:57:15,861 INFO L480 AbstractCegarLoop]: Abstraction has 2605 states and 4349 transitions. [2018-09-28 09:57:15,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 09:57:15,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2605 states and 4349 transitions. [2018-09-28 09:57:15,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 09:57:15,862 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:57:15,862 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2018-09-28 09:57:15,863 INFO L423 AbstractCegarLoop]: === Iteration 41 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:57:15,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:57:15,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1793898800, now seen corresponding path program 1 times [2018-09-28 09:57:15,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:57:15,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:57:15,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:15,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:15,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:15,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:15,991 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-28 09:57:15,991 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:57:15,991 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:57:15,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:16,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:16,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:57:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:16,230 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:57:16,230 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2018-09-28 09:57:16,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-28 09:57:16,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-28 09:57:16,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2018-09-28 09:57:16,231 INFO L87 Difference]: Start difference. First operand 2605 states and 4349 transitions. Second operand 20 states. [2018-09-28 09:57:22,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:57:22,262 INFO L93 Difference]: Finished difference Result 5120 states and 8519 transitions. [2018-09-28 09:57:22,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-28 09:57:22,263 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 18 [2018-09-28 09:57:22,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:57:22,269 INFO L225 Difference]: With dead ends: 5120 [2018-09-28 09:57:22,269 INFO L226 Difference]: Without dead ends: 3342 [2018-09-28 09:57:22,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3994 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1800, Invalid=9972, Unknown=0, NotChecked=0, Total=11772 [2018-09-28 09:57:22,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3342 states. [2018-09-28 09:57:23,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3342 to 2886. [2018-09-28 09:57:23,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2886 states. [2018-09-28 09:57:23,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2886 states to 2886 states and 4822 transitions. [2018-09-28 09:57:23,173 INFO L78 Accepts]: Start accepts. Automaton has 2886 states and 4822 transitions. Word has length 18 [2018-09-28 09:57:23,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:57:23,173 INFO L480 AbstractCegarLoop]: Abstraction has 2886 states and 4822 transitions. [2018-09-28 09:57:23,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-28 09:57:23,174 INFO L276 IsEmpty]: Start isEmpty. Operand 2886 states and 4822 transitions. [2018-09-28 09:57:23,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 09:57:23,175 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:57:23,175 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:57:23,175 INFO L423 AbstractCegarLoop]: === Iteration 42 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:57:23,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:57:23,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1793897518, now seen corresponding path program 1 times [2018-09-28 09:57:23,176 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:57:23,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:57:23,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:23,176 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:23,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:23,303 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:57:23,304 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:57:23,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:23,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:23,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:57:23,397 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-28 09:57:23,419 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:57:23,419 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2018-09-28 09:57:23,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-28 09:57:23,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-28 09:57:23,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2018-09-28 09:57:23,420 INFO L87 Difference]: Start difference. First operand 2886 states and 4822 transitions. Second operand 16 states. [2018-09-28 09:57:26,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:57:26,407 INFO L93 Difference]: Finished difference Result 3487 states and 5852 transitions. [2018-09-28 09:57:26,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-28 09:57:26,407 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2018-09-28 09:57:26,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:57:26,415 INFO L225 Difference]: With dead ends: 3487 [2018-09-28 09:57:26,415 INFO L226 Difference]: Without dead ends: 3485 [2018-09-28 09:57:26,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=616, Invalid=3544, Unknown=0, NotChecked=0, Total=4160 [2018-09-28 09:57:26,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3485 states. [2018-09-28 09:57:27,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3485 to 2999. [2018-09-28 09:57:27,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2999 states. [2018-09-28 09:57:27,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 5026 transitions. [2018-09-28 09:57:27,211 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 5026 transitions. Word has length 18 [2018-09-28 09:57:27,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:57:27,211 INFO L480 AbstractCegarLoop]: Abstraction has 2999 states and 5026 transitions. [2018-09-28 09:57:27,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-28 09:57:27,211 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 5026 transitions. [2018-09-28 09:57:27,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 09:57:27,212 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:57:27,213 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-28 09:57:27,213 INFO L423 AbstractCegarLoop]: === Iteration 43 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:57:27,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:57:27,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1785310631, now seen corresponding path program 1 times [2018-09-28 09:57:27,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:57:27,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:57:27,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:27,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:27,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:27,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:27,382 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:57:27,382 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:57:27,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:27,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:27,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:57:27,563 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-28 09:57:27,584 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:57:27,585 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2018-09-28 09:57:27,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 09:57:27,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 09:57:27,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2018-09-28 09:57:27,586 INFO L87 Difference]: Start difference. First operand 2999 states and 5026 transitions. Second operand 15 states. [2018-09-28 09:57:30,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:57:30,774 INFO L93 Difference]: Finished difference Result 3557 states and 5973 transitions. [2018-09-28 09:57:30,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-28 09:57:30,774 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2018-09-28 09:57:30,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:57:30,778 INFO L225 Difference]: With dead ends: 3557 [2018-09-28 09:57:30,779 INFO L226 Difference]: Without dead ends: 3555 [2018-09-28 09:57:30,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=674, Invalid=3486, Unknown=0, NotChecked=0, Total=4160 [2018-09-28 09:57:30,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3555 states. [2018-09-28 09:57:31,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3555 to 3102. [2018-09-28 09:57:31,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3102 states. [2018-09-28 09:57:31,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3102 states to 3102 states and 5194 transitions. [2018-09-28 09:57:31,491 INFO L78 Accepts]: Start accepts. Automaton has 3102 states and 5194 transitions. Word has length 18 [2018-09-28 09:57:31,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:57:31,491 INFO L480 AbstractCegarLoop]: Abstraction has 3102 states and 5194 transitions. [2018-09-28 09:57:31,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 09:57:31,491 INFO L276 IsEmpty]: Start isEmpty. Operand 3102 states and 5194 transitions. [2018-09-28 09:57:31,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 09:57:31,492 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:57:31,492 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:57:31,492 INFO L423 AbstractCegarLoop]: === Iteration 44 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:57:31,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:57:31,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1256757274, now seen corresponding path program 2 times [2018-09-28 09:57:31,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:57:31,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:57:31,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:31,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:31,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:31,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:31,605 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:31,605 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:57:31,605 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:57:31,616 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 09:57:31,630 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 09:57:31,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:57:31,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:57:31,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:31,864 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:57:31,864 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2018-09-28 09:57:31,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-28 09:57:31,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-28 09:57:31,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2018-09-28 09:57:31,865 INFO L87 Difference]: Start difference. First operand 3102 states and 5194 transitions. Second operand 18 states. [2018-09-28 09:57:40,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:57:40,104 INFO L93 Difference]: Finished difference Result 5252 states and 8823 transitions. [2018-09-28 09:57:40,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-28 09:57:40,104 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-28 09:57:40,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:57:40,108 INFO L225 Difference]: With dead ends: 5252 [2018-09-28 09:57:40,108 INFO L226 Difference]: Without dead ends: 5250 [2018-09-28 09:57:40,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7869 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2825, Invalid=16915, Unknown=0, NotChecked=0, Total=19740 [2018-09-28 09:57:40,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5250 states. [2018-09-28 09:57:40,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5250 to 3515. [2018-09-28 09:57:40,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3515 states. [2018-09-28 09:57:40,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3515 states to 3515 states and 5926 transitions. [2018-09-28 09:57:40,926 INFO L78 Accepts]: Start accepts. Automaton has 3515 states and 5926 transitions. Word has length 18 [2018-09-28 09:57:40,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:57:40,926 INFO L480 AbstractCegarLoop]: Abstraction has 3515 states and 5926 transitions. [2018-09-28 09:57:40,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-28 09:57:40,926 INFO L276 IsEmpty]: Start isEmpty. Operand 3515 states and 5926 transitions. [2018-09-28 09:57:40,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 09:57:40,928 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:57:40,928 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-28 09:57:40,928 INFO L423 AbstractCegarLoop]: === Iteration 45 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:57:40,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:57:40,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1248170387, now seen corresponding path program 2 times [2018-09-28 09:57:40,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:57:40,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:57:40,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:40,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:57:40,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:40,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:41,150 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:57:41,150 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:57:41,158 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 09:57:41,164 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 09:57:41,164 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:57:41,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:57:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:41,300 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:57:41,300 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-09-28 09:57:41,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-28 09:57:41,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-28 09:57:41,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2018-09-28 09:57:41,301 INFO L87 Difference]: Start difference. First operand 3515 states and 5926 transitions. Second operand 18 states. [2018-09-28 09:57:49,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:57:49,238 INFO L93 Difference]: Finished difference Result 4843 states and 8107 transitions. [2018-09-28 09:57:49,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-09-28 09:57:49,239 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-28 09:57:49,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:57:49,244 INFO L225 Difference]: With dead ends: 4843 [2018-09-28 09:57:49,244 INFO L226 Difference]: Without dead ends: 4841 [2018-09-28 09:57:49,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6131 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2645, Invalid=12855, Unknown=0, NotChecked=0, Total=15500 [2018-09-28 09:57:49,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4841 states. [2018-09-28 09:57:50,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4841 to 3405. [2018-09-28 09:57:50,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3405 states. [2018-09-28 09:57:50,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3405 states to 3405 states and 5721 transitions. [2018-09-28 09:57:50,013 INFO L78 Accepts]: Start accepts. Automaton has 3405 states and 5721 transitions. Word has length 18 [2018-09-28 09:57:50,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:57:50,013 INFO L480 AbstractCegarLoop]: Abstraction has 3405 states and 5721 transitions. [2018-09-28 09:57:50,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-28 09:57:50,013 INFO L276 IsEmpty]: Start isEmpty. Operand 3405 states and 5721 transitions. [2018-09-28 09:57:50,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 09:57:50,014 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:57:50,014 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-28 09:57:50,014 INFO L423 AbstractCegarLoop]: === Iteration 46 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:57:50,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:57:50,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1231339551, now seen corresponding path program 2 times [2018-09-28 09:57:50,015 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:57:50,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:57:50,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:50,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:57:50,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:50,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:50,212 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:57:50,213 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:57:50,222 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 09:57:50,230 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 09:57:50,231 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:57:50,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:57:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-28 09:57:50,314 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:57:50,314 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 16 [2018-09-28 09:57:50,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-28 09:57:50,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-28 09:57:50,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2018-09-28 09:57:50,315 INFO L87 Difference]: Start difference. First operand 3405 states and 5721 transitions. Second operand 16 states. [2018-09-28 09:57:53,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:57:53,061 INFO L93 Difference]: Finished difference Result 5774 states and 9598 transitions. [2018-09-28 09:57:53,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-28 09:57:53,062 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2018-09-28 09:57:53,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:57:53,065 INFO L225 Difference]: With dead ends: 5774 [2018-09-28 09:57:53,065 INFO L226 Difference]: Without dead ends: 3100 [2018-09-28 09:57:53,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=695, Invalid=2385, Unknown=0, NotChecked=0, Total=3080 [2018-09-28 09:57:53,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2018-09-28 09:57:53,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 2583. [2018-09-28 09:57:53,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2583 states. [2018-09-28 09:57:53,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2583 states to 2583 states and 4270 transitions. [2018-09-28 09:57:53,681 INFO L78 Accepts]: Start accepts. Automaton has 2583 states and 4270 transitions. Word has length 18 [2018-09-28 09:57:53,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:57:53,682 INFO L480 AbstractCegarLoop]: Abstraction has 2583 states and 4270 transitions. [2018-09-28 09:57:53,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-28 09:57:53,682 INFO L276 IsEmpty]: Start isEmpty. Operand 2583 states and 4270 transitions. [2018-09-28 09:57:53,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 09:57:53,683 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:57:53,683 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:57:53,683 INFO L423 AbstractCegarLoop]: === Iteration 47 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:57:53,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:57:53,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1890837259, now seen corresponding path program 1 times [2018-09-28 09:57:53,683 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:57:53,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:57:53,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:53,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:57:53,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:53,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:53,880 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:53,880 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:57:53,880 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:57:53,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:53,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:53,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:57:53,968 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-28 09:57:53,990 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:57:53,990 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2018-09-28 09:57:53,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 09:57:53,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 09:57:53,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2018-09-28 09:57:53,991 INFO L87 Difference]: Start difference. First operand 2583 states and 4270 transitions. Second operand 15 states. [2018-09-28 09:57:56,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:57:56,524 INFO L93 Difference]: Finished difference Result 3114 states and 5123 transitions. [2018-09-28 09:57:56,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-28 09:57:56,525 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2018-09-28 09:57:56,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:57:56,528 INFO L225 Difference]: With dead ends: 3114 [2018-09-28 09:57:56,528 INFO L226 Difference]: Without dead ends: 3112 [2018-09-28 09:57:56,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=409, Invalid=1847, Unknown=0, NotChecked=0, Total=2256 [2018-09-28 09:57:56,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3112 states. [2018-09-28 09:57:57,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3112 to 2773. [2018-09-28 09:57:57,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2773 states. [2018-09-28 09:57:57,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2773 states to 2773 states and 4589 transitions. [2018-09-28 09:57:57,261 INFO L78 Accepts]: Start accepts. Automaton has 2773 states and 4589 transitions. Word has length 18 [2018-09-28 09:57:57,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:57:57,261 INFO L480 AbstractCegarLoop]: Abstraction has 2773 states and 4589 transitions. [2018-09-28 09:57:57,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 09:57:57,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2773 states and 4589 transitions. [2018-09-28 09:57:57,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 09:57:57,262 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:57:57,262 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-28 09:57:57,263 INFO L423 AbstractCegarLoop]: === Iteration 48 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:57:57,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:57:57,263 INFO L82 PathProgramCache]: Analyzing trace with hash 740718717, now seen corresponding path program 2 times [2018-09-28 09:57:57,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:57:57,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:57:57,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:57,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:57,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:57,350 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:57,350 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:57:57,351 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:57:57,359 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 09:57:57,367 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 09:57:57,367 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:57:57,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:57:57,464 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:57,486 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:57:57,486 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2018-09-28 09:57:57,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-28 09:57:57,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-28 09:57:57,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2018-09-28 09:57:57,487 INFO L87 Difference]: Start difference. First operand 2773 states and 4589 transitions. Second operand 17 states. [2018-09-28 09:58:02,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:58:02,941 INFO L93 Difference]: Finished difference Result 4415 states and 7404 transitions. [2018-09-28 09:58:02,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-28 09:58:02,942 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2018-09-28 09:58:02,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:58:02,946 INFO L225 Difference]: With dead ends: 4415 [2018-09-28 09:58:02,946 INFO L226 Difference]: Without dead ends: 4413 [2018-09-28 09:58:02,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3051 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1803, Invalid=6939, Unknown=0, NotChecked=0, Total=8742 [2018-09-28 09:58:02,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4413 states. [2018-09-28 09:58:03,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4413 to 3073. [2018-09-28 09:58:03,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3073 states. [2018-09-28 09:58:03,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3073 states to 3073 states and 5108 transitions. [2018-09-28 09:58:03,858 INFO L78 Accepts]: Start accepts. Automaton has 3073 states and 5108 transitions. Word has length 18 [2018-09-28 09:58:03,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:58:03,858 INFO L480 AbstractCegarLoop]: Abstraction has 3073 states and 5108 transitions. [2018-09-28 09:58:03,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-28 09:58:03,858 INFO L276 IsEmpty]: Start isEmpty. Operand 3073 states and 5108 transitions. [2018-09-28 09:58:03,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 09:58:03,859 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:58:03,859 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:58:03,859 INFO L423 AbstractCegarLoop]: === Iteration 49 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:58:03,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:58:03,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1434281659, now seen corresponding path program 1 times [2018-09-28 09:58:03,860 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:58:03,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:58:03,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:58:03,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:58:03,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:58:03,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:58:03,966 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:58:03,966 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:58:03,966 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:58:03,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:58:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:58:03,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:58:04,079 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:58:04,100 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:58:04,101 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2018-09-28 09:58:04,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-28 09:58:04,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-28 09:58:04,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2018-09-28 09:58:04,101 INFO L87 Difference]: Start difference. First operand 3073 states and 5108 transitions. Second operand 16 states. [2018-09-28 09:58:08,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:58:08,169 INFO L93 Difference]: Finished difference Result 4429 states and 7411 transitions. [2018-09-28 09:58:08,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-28 09:58:08,170 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2018-09-28 09:58:08,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:58:08,174 INFO L225 Difference]: With dead ends: 4429 [2018-09-28 09:58:08,174 INFO L226 Difference]: Without dead ends: 4427 [2018-09-28 09:58:08,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2018-09-28 09:58:08,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4427 states. [2018-09-28 09:58:08,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4427 to 2723. [2018-09-28 09:58:08,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2723 states. [2018-09-28 09:58:08,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2723 states to 2723 states and 4478 transitions. [2018-09-28 09:58:08,966 INFO L78 Accepts]: Start accepts. Automaton has 2723 states and 4478 transitions. Word has length 18 [2018-09-28 09:58:08,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:58:08,966 INFO L480 AbstractCegarLoop]: Abstraction has 2723 states and 4478 transitions. [2018-09-28 09:58:08,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-28 09:58:08,966 INFO L276 IsEmpty]: Start isEmpty. Operand 2723 states and 4478 transitions. [2018-09-28 09:58:08,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 09:58:08,967 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:58:08,967 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:58:08,967 INFO L423 AbstractCegarLoop]: === Iteration 50 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:58:08,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:58:08,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1483012849, now seen corresponding path program 1 times [2018-09-28 09:58:08,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:58:08,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:58:08,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:58:08,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:58:08,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:58:08,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:58:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:58:09,058 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:58:09,059 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:58:09,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:58:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:58:09,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:58:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:58:09,252 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:58:09,252 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2018-09-28 09:58:09,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-28 09:58:09,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-28 09:58:09,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2018-09-28 09:58:09,253 INFO L87 Difference]: Start difference. First operand 2723 states and 4478 transitions. Second operand 18 states. [2018-09-28 09:58:13,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:58:13,863 INFO L93 Difference]: Finished difference Result 4290 states and 7151 transitions. [2018-09-28 09:58:13,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-28 09:58:13,864 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-28 09:58:13,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:58:13,868 INFO L225 Difference]: With dead ends: 4290 [2018-09-28 09:58:13,868 INFO L226 Difference]: Without dead ends: 4288 [2018-09-28 09:58:13,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=986, Invalid=4416, Unknown=0, NotChecked=0, Total=5402 [2018-09-28 09:58:13,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4288 states. [2018-09-28 09:58:14,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4288 to 3364. [2018-09-28 09:58:14,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3364 states. [2018-09-28 09:58:14,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3364 states to 3364 states and 5610 transitions. [2018-09-28 09:58:14,945 INFO L78 Accepts]: Start accepts. Automaton has 3364 states and 5610 transitions. Word has length 18 [2018-09-28 09:58:14,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:58:14,945 INFO L480 AbstractCegarLoop]: Abstraction has 3364 states and 5610 transitions. [2018-09-28 09:58:14,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-28 09:58:14,945 INFO L276 IsEmpty]: Start isEmpty. Operand 3364 states and 5610 transitions. [2018-09-28 09:58:14,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 09:58:14,947 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:58:14,947 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-28 09:58:14,947 INFO L423 AbstractCegarLoop]: === Iteration 51 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:58:14,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:58:14,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1851213523, now seen corresponding path program 3 times [2018-09-28 09:58:14,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:58:14,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:58:14,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:58:14,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:58:14,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:58:14,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:58:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:58:15,061 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:58:15,061 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:58:15,070 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 09:58:15,079 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-28 09:58:15,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:58:15,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:58:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-28 09:58:15,283 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:58:15,283 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2018-09-28 09:58:15,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-28 09:58:15,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-28 09:58:15,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2018-09-28 09:58:15,284 INFO L87 Difference]: Start difference. First operand 3364 states and 5610 transitions. Second operand 18 states. [2018-09-28 09:58:20,829 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2018-09-28 09:58:23,754 WARN L178 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2018-09-28 09:58:26,673 WARN L178 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2018-09-28 09:58:27,127 WARN L178 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2018-09-28 09:58:27,709 WARN L178 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2018-09-28 09:58:28,148 WARN L178 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2018-09-28 09:58:29,790 WARN L178 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2018-09-28 09:58:30,421 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2018-09-28 09:58:31,137 WARN L178 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2018-09-28 09:58:31,863 WARN L178 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2018-09-28 09:58:32,468 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2018-09-28 09:58:38,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:58:38,501 INFO L93 Difference]: Finished difference Result 9624 states and 16323 transitions. [2018-09-28 09:58:38,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2018-09-28 09:58:38,502 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-28 09:58:38,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:58:38,511 INFO L225 Difference]: With dead ends: 9624 [2018-09-28 09:58:38,511 INFO L226 Difference]: Without dead ends: 9622 [2018-09-28 09:58:38,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16036 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=6166, Invalid=32839, Unknown=1, NotChecked=0, Total=39006 [2018-09-28 09:58:38,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9622 states. [2018-09-28 09:58:39,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9622 to 3326. [2018-09-28 09:58:39,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3326 states. [2018-09-28 09:58:39,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3326 states to 3326 states and 5536 transitions. [2018-09-28 09:58:39,661 INFO L78 Accepts]: Start accepts. Automaton has 3326 states and 5536 transitions. Word has length 18 [2018-09-28 09:58:39,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:58:39,661 INFO L480 AbstractCegarLoop]: Abstraction has 3326 states and 5536 transitions. [2018-09-28 09:58:39,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-28 09:58:39,661 INFO L276 IsEmpty]: Start isEmpty. Operand 3326 states and 5536 transitions. [2018-09-28 09:58:39,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 09:58:39,663 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:58:39,663 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:58:39,663 INFO L423 AbstractCegarLoop]: === Iteration 52 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:58:39,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:58:39,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1899944713, now seen corresponding path program 1 times [2018-09-28 09:58:39,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:58:39,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:58:39,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:58:39,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:58:39,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:58:39,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:58:39,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:58:39,761 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:58:39,761 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:58:39,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:58:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:58:39,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:58:39,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-28 09:58:39,878 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:58:39,878 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2018-09-28 09:58:39,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-28 09:58:39,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-28 09:58:39,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2018-09-28 09:58:39,879 INFO L87 Difference]: Start difference. First operand 3326 states and 5536 transitions. Second operand 17 states. [2018-09-28 09:58:45,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:58:45,506 INFO L93 Difference]: Finished difference Result 5572 states and 9460 transitions. [2018-09-28 09:58:45,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-28 09:58:45,506 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2018-09-28 09:58:45,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:58:45,512 INFO L225 Difference]: With dead ends: 5572 [2018-09-28 09:58:45,512 INFO L226 Difference]: Without dead ends: 5570 [2018-09-28 09:58:45,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2783 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1511, Invalid=7045, Unknown=0, NotChecked=0, Total=8556 [2018-09-28 09:58:45,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5570 states. [2018-09-28 09:58:46,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5570 to 3526. [2018-09-28 09:58:46,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3526 states. [2018-09-28 09:58:46,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3526 states to 3526 states and 5899 transitions. [2018-09-28 09:58:46,896 INFO L78 Accepts]: Start accepts. Automaton has 3526 states and 5899 transitions. Word has length 18 [2018-09-28 09:58:46,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:58:46,896 INFO L480 AbstractCegarLoop]: Abstraction has 3526 states and 5899 transitions. [2018-09-28 09:58:46,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-28 09:58:46,897 INFO L276 IsEmpty]: Start isEmpty. Operand 3526 states and 5899 transitions. [2018-09-28 09:58:46,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 09:58:46,898 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:58:46,898 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:58:46,898 INFO L423 AbstractCegarLoop]: === Iteration 53 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:58:46,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:58:46,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1150743797, now seen corresponding path program 2 times [2018-09-28 09:58:46,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:58:46,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:58:46,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:58:46,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:58:46,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:58:46,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:58:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:58:46,997 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:58:46,997 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:58:47,006 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 09:58:47,013 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 09:58:47,014 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:58:47,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:58:47,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-28 09:58:47,137 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:58:47,138 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2018-09-28 09:58:47,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-28 09:58:47,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-28 09:58:47,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2018-09-28 09:58:47,139 INFO L87 Difference]: Start difference. First operand 3526 states and 5899 transitions. Second operand 17 states. [2018-09-28 09:58:51,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:58:51,614 INFO L93 Difference]: Finished difference Result 4458 states and 7480 transitions. [2018-09-28 09:58:51,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-28 09:58:51,614 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2018-09-28 09:58:51,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:58:51,617 INFO L225 Difference]: With dead ends: 4458 [2018-09-28 09:58:51,617 INFO L226 Difference]: Without dead ends: 4456 [2018-09-28 09:58:51,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2117 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=904, Invalid=5258, Unknown=0, NotChecked=0, Total=6162 [2018-09-28 09:58:51,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4456 states. [2018-09-28 09:58:52,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4456 to 3633. [2018-09-28 09:58:52,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3633 states. [2018-09-28 09:58:52,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3633 states to 3633 states and 6081 transitions. [2018-09-28 09:58:52,881 INFO L78 Accepts]: Start accepts. Automaton has 3633 states and 6081 transitions. Word has length 18 [2018-09-28 09:58:52,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:58:52,881 INFO L480 AbstractCegarLoop]: Abstraction has 3633 states and 6081 transitions. [2018-09-28 09:58:52,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-28 09:58:52,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3633 states and 6081 transitions. [2018-09-28 09:58:52,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 09:58:52,883 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:58:52,883 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:58:52,883 INFO L423 AbstractCegarLoop]: === Iteration 54 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:58:52,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:58:52,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1665373557, now seen corresponding path program 1 times [2018-09-28 09:58:52,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:58:52,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:58:52,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:58:52,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:58:52,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:58:52,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:58:53,048 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:58:53,049 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:58:53,049 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:58:53,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:58:53,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:58:53,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:58:53,553 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-28 09:58:53,592 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:58:53,592 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2018-09-28 09:58:53,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-28 09:58:53,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-28 09:58:53,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2018-09-28 09:58:53,593 INFO L87 Difference]: Start difference. First operand 3633 states and 6081 transitions. Second operand 21 states. [2018-09-28 09:58:54,093 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-09-28 09:58:58,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:58:58,215 INFO L93 Difference]: Finished difference Result 4389 states and 7355 transitions. [2018-09-28 09:58:58,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-28 09:58:58,215 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 19 [2018-09-28 09:58:58,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:58:58,219 INFO L225 Difference]: With dead ends: 4389 [2018-09-28 09:58:58,219 INFO L226 Difference]: Without dead ends: 4376 [2018-09-28 09:58:58,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=725, Invalid=3181, Unknown=0, NotChecked=0, Total=3906 [2018-09-28 09:58:58,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4376 states. [2018-09-28 09:58:59,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4376 to 4152. [2018-09-28 09:58:59,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4152 states. [2018-09-28 09:58:59,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4152 states to 4152 states and 6931 transitions. [2018-09-28 09:58:59,689 INFO L78 Accepts]: Start accepts. Automaton has 4152 states and 6931 transitions. Word has length 19 [2018-09-28 09:58:59,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:58:59,689 INFO L480 AbstractCegarLoop]: Abstraction has 4152 states and 6931 transitions. [2018-09-28 09:58:59,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-28 09:58:59,689 INFO L276 IsEmpty]: Start isEmpty. Operand 4152 states and 6931 transitions. [2018-09-28 09:58:59,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 09:58:59,690 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:58:59,690 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-28 09:58:59,690 INFO L423 AbstractCegarLoop]: === Iteration 55 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:58:59,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:58:59,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1271169050, now seen corresponding path program 1 times [2018-09-28 09:58:59,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:58:59,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:58:59,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:58:59,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:58:59,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:58:59,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:58:59,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:58:59,861 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:58:59,861 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:58:59,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:58:59,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:58:59,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:00,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:00,090 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:00,090 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2018-09-28 09:59:00,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-28 09:59:00,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-28 09:59:00,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2018-09-28 09:59:00,091 INFO L87 Difference]: Start difference. First operand 4152 states and 6931 transitions. Second operand 19 states. [2018-09-28 09:59:07,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:07,720 INFO L93 Difference]: Finished difference Result 7602 states and 12857 transitions. [2018-09-28 09:59:07,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-28 09:59:07,721 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-28 09:59:07,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:07,729 INFO L225 Difference]: With dead ends: 7602 [2018-09-28 09:59:07,729 INFO L226 Difference]: Without dead ends: 7553 [2018-09-28 09:59:07,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1106, Invalid=4006, Unknown=0, NotChecked=0, Total=5112 [2018-09-28 09:59:07,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7553 states. [2018-09-28 09:59:10,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7553 to 5765. [2018-09-28 09:59:10,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5765 states. [2018-09-28 09:59:10,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5765 states to 5765 states and 9725 transitions. [2018-09-28 09:59:10,281 INFO L78 Accepts]: Start accepts. Automaton has 5765 states and 9725 transitions. Word has length 19 [2018-09-28 09:59:10,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:10,281 INFO L480 AbstractCegarLoop]: Abstraction has 5765 states and 9725 transitions. [2018-09-28 09:59:10,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-28 09:59:10,281 INFO L276 IsEmpty]: Start isEmpty. Operand 5765 states and 9725 transitions. [2018-09-28 09:59:10,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 09:59:10,283 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:10,283 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:59:10,283 INFO L423 AbstractCegarLoop]: === Iteration 56 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:10,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:10,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1231183154, now seen corresponding path program 1 times [2018-09-28 09:59:10,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:10,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:10,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:10,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:59:10,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:10,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:10,418 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:10,418 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:10,418 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:59:10,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:59:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:10,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:10,533 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-28 09:59:10,556 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:10,556 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2018-09-28 09:59:10,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-28 09:59:10,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-28 09:59:10,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2018-09-28 09:59:10,557 INFO L87 Difference]: Start difference. First operand 5765 states and 9725 transitions. Second operand 18 states. [2018-09-28 09:59:21,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:21,713 INFO L93 Difference]: Finished difference Result 10730 states and 18220 transitions. [2018-09-28 09:59:21,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-28 09:59:21,714 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2018-09-28 09:59:21,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:21,723 INFO L225 Difference]: With dead ends: 10730 [2018-09-28 09:59:21,723 INFO L226 Difference]: Without dead ends: 10673 [2018-09-28 09:59:21,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2305 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1268, Invalid=5872, Unknown=0, NotChecked=0, Total=7140 [2018-09-28 09:59:21,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10673 states. [2018-09-28 09:59:24,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10673 to 5867. [2018-09-28 09:59:24,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5867 states. [2018-09-28 09:59:24,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5867 states to 5867 states and 9873 transitions. [2018-09-28 09:59:24,502 INFO L78 Accepts]: Start accepts. Automaton has 5867 states and 9873 transitions. Word has length 19 [2018-09-28 09:59:24,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:24,502 INFO L480 AbstractCegarLoop]: Abstraction has 5867 states and 9873 transitions. [2018-09-28 09:59:24,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-28 09:59:24,502 INFO L276 IsEmpty]: Start isEmpty. Operand 5867 states and 9873 transitions. [2018-09-28 09:59:24,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-28 09:59:24,504 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:24,504 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2018-09-28 09:59:24,504 INFO L423 AbstractCegarLoop]: === Iteration 57 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:24,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:24,505 INFO L82 PathProgramCache]: Analyzing trace with hash -298147634, now seen corresponding path program 2 times [2018-09-28 09:59:24,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:24,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:24,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:24,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:59:24,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:24,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:24,626 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-28 09:59:24,626 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:24,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:59:24,634 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 09:59:24,642 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 09:59:24,642 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:59:24,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:24,763 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-28 09:59:24,783 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:24,783 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2018-09-28 09:59:24,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-28 09:59:24,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-28 09:59:24,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2018-09-28 09:59:24,784 INFO L87 Difference]: Start difference. First operand 5867 states and 9873 transitions. Second operand 20 states. [2018-09-28 09:59:30,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:30,109 INFO L93 Difference]: Finished difference Result 12951 states and 21640 transitions. [2018-09-28 09:59:30,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-28 09:59:30,110 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 21 [2018-09-28 09:59:30,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:30,117 INFO L225 Difference]: With dead ends: 12951 [2018-09-28 09:59:30,117 INFO L226 Difference]: Without dead ends: 7453 [2018-09-28 09:59:30,122 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=369, Invalid=1983, Unknown=0, NotChecked=0, Total=2352 [2018-09-28 09:59:30,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7453 states. [2018-09-28 09:59:33,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7453 to 6977. [2018-09-28 09:59:33,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6977 states. [2018-09-28 09:59:33,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6977 states to 6977 states and 11514 transitions. [2018-09-28 09:59:33,246 INFO L78 Accepts]: Start accepts. Automaton has 6977 states and 11514 transitions. Word has length 21 [2018-09-28 09:59:33,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:33,246 INFO L480 AbstractCegarLoop]: Abstraction has 6977 states and 11514 transitions. [2018-09-28 09:59:33,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-28 09:59:33,246 INFO L276 IsEmpty]: Start isEmpty. Operand 6977 states and 11514 transitions. [2018-09-28 09:59:33,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-28 09:59:33,248 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:33,248 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:59:33,248 INFO L423 AbstractCegarLoop]: === Iteration 58 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:33,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:33,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1920603351, now seen corresponding path program 1 times [2018-09-28 09:59:33,249 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:33,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:33,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:33,249 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:59:33,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:33,374 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:33,374 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:33,374 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:59:33,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:59:33,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:33,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-28 09:59:33,487 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:33,487 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2018-09-28 09:59:33,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-28 09:59:33,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-28 09:59:33,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2018-09-28 09:59:33,488 INFO L87 Difference]: Start difference. First operand 6977 states and 11514 transitions. Second operand 17 states. [2018-09-28 09:59:38,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:38,869 INFO L93 Difference]: Finished difference Result 7309 states and 12055 transitions. [2018-09-28 09:59:38,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-28 09:59:38,870 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2018-09-28 09:59:38,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:38,876 INFO L225 Difference]: With dead ends: 7309 [2018-09-28 09:59:38,876 INFO L226 Difference]: Without dead ends: 7307 [2018-09-28 09:59:38,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=366, Invalid=1796, Unknown=0, NotChecked=0, Total=2162 [2018-09-28 09:59:38,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7307 states. [2018-09-28 09:59:41,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7307 to 6935. [2018-09-28 09:59:41,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6935 states. [2018-09-28 09:59:41,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6935 states to 6935 states and 11445 transitions. [2018-09-28 09:59:41,954 INFO L78 Accepts]: Start accepts. Automaton has 6935 states and 11445 transitions. Word has length 21 [2018-09-28 09:59:41,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:41,955 INFO L480 AbstractCegarLoop]: Abstraction has 6935 states and 11445 transitions. [2018-09-28 09:59:41,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-28 09:59:41,955 INFO L276 IsEmpty]: Start isEmpty. Operand 6935 states and 11445 transitions. [2018-09-28 09:59:41,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-28 09:59:41,957 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:41,957 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:59:41,957 INFO L423 AbstractCegarLoop]: === Iteration 59 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:41,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:41,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1010297104, now seen corresponding path program 1 times [2018-09-28 09:59:41,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:41,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:41,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:41,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:59:41,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:41,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-28 09:59:42,140 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:42,140 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:59:42,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:59:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:42,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:42,757 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-28 09:59:42,778 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:42,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2018-09-28 09:59:42,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-28 09:59:42,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-28 09:59:42,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2018-09-28 09:59:42,779 INFO L87 Difference]: Start difference. First operand 6935 states and 11445 transitions. Second operand 21 states. [2018-09-28 09:59:49,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:49,198 INFO L93 Difference]: Finished difference Result 11330 states and 18599 transitions. [2018-09-28 09:59:49,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-28 09:59:49,198 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-28 09:59:49,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:49,206 INFO L225 Difference]: With dead ends: 11330 [2018-09-28 09:59:49,206 INFO L226 Difference]: Without dead ends: 7599 [2018-09-28 09:59:49,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=590, Invalid=3442, Unknown=0, NotChecked=0, Total=4032 [2018-09-28 09:59:49,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7599 states. [2018-09-28 09:59:52,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7599 to 6837. [2018-09-28 09:59:52,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6837 states. [2018-09-28 09:59:52,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6837 states to 6837 states and 11276 transitions. [2018-09-28 09:59:52,559 INFO L78 Accepts]: Start accepts. Automaton has 6837 states and 11276 transitions. Word has length 21 [2018-09-28 09:59:52,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:52,560 INFO L480 AbstractCegarLoop]: Abstraction has 6837 states and 11276 transitions. [2018-09-28 09:59:52,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-28 09:59:52,560 INFO L276 IsEmpty]: Start isEmpty. Operand 6837 states and 11276 transitions. [2018-09-28 09:59:52,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-28 09:59:52,561 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:52,562 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:59:52,562 INFO L423 AbstractCegarLoop]: === Iteration 60 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:52,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:52,562 INFO L82 PathProgramCache]: Analyzing trace with hash -972124902, now seen corresponding path program 1 times [2018-09-28 09:59:52,562 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:52,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:52,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:52,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:59:52,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:52,904 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:52,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:59:52,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:59:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:52,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:53,026 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-28 09:59:53,047 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:53,047 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 14 [2018-09-28 09:59:53,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 09:59:53,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 09:59:53,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2018-09-28 09:59:53,047 INFO L87 Difference]: Start difference. First operand 6837 states and 11276 transitions. Second operand 15 states. [2018-09-28 09:59:57,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:57,777 INFO L93 Difference]: Finished difference Result 7136 states and 11762 transitions. [2018-09-28 09:59:57,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-28 09:59:57,777 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2018-09-28 09:59:57,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:57,784 INFO L225 Difference]: With dead ends: 7136 [2018-09-28 09:59:57,784 INFO L226 Difference]: Without dead ends: 7134 [2018-09-28 09:59:57,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2018-09-28 09:59:57,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7134 states. [2018-09-28 10:00:00,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7134 to 6814. [2018-09-28 10:00:00,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6814 states. [2018-09-28 10:00:00,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6814 states to 6814 states and 11236 transitions. [2018-09-28 10:00:00,976 INFO L78 Accepts]: Start accepts. Automaton has 6814 states and 11236 transitions. Word has length 21 [2018-09-28 10:00:00,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:00,976 INFO L480 AbstractCegarLoop]: Abstraction has 6814 states and 11236 transitions. [2018-09-28 10:00:00,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 10:00:00,977 INFO L276 IsEmpty]: Start isEmpty. Operand 6814 states and 11236 transitions. [2018-09-28 10:00:00,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-28 10:00:00,978 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:00,978 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2018-09-28 10:00:00,978 INFO L423 AbstractCegarLoop]: === Iteration 61 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:00,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:00,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1513598179, now seen corresponding path program 4 times [2018-09-28 10:00:00,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:00,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:00,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:00,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:00,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:00,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:01,297 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:01,297 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:01,307 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:00:01,316 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:00:01,317 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:01,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-28 10:00:01,538 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:01,538 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2018-09-28 10:00:01,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-28 10:00:01,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-28 10:00:01,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2018-09-28 10:00:01,539 INFO L87 Difference]: Start difference. First operand 6814 states and 11236 transitions. Second operand 20 states. [2018-09-28 10:00:14,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:14,213 INFO L93 Difference]: Finished difference Result 19394 states and 31307 transitions. [2018-09-28 10:00:14,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-09-28 10:00:14,213 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 21 [2018-09-28 10:00:14,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:14,224 INFO L225 Difference]: With dead ends: 19394 [2018-09-28 10:00:14,225 INFO L226 Difference]: Without dead ends: 12053 [2018-09-28 10:00:14,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6952 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2115, Invalid=16245, Unknown=0, NotChecked=0, Total=18360 [2018-09-28 10:00:14,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12053 states. Received shutdown request... [2018-09-28 10:00:19,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12053 to 9291. [2018-09-28 10:00:19,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9291 states. [2018-09-28 10:00:19,107 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-28 10:00:19,113 WARN L206 ceAbstractionStarter]: Timeout [2018-09-28 10:00:19,113 INFO L202 PluginConnector]: Adding new model threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.09 10:00:19 BoogieIcfgContainer [2018-09-28 10:00:19,113 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-28 10:00:19,114 INFO L168 Benchmark]: Toolchain (without parser) took 254472.07 ms. Allocated memory was 1.5 GB in the beginning and 3.4 GB in the end (delta: 1.9 GB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 79.1 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-09-28 10:00:19,115 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:00:19,115 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.15 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:00:19,116 INFO L168 Benchmark]: Boogie Preprocessor took 22.88 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:00:19,116 INFO L168 Benchmark]: RCFGBuilder took 436.13 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-28 10:00:19,116 INFO L168 Benchmark]: TraceAbstraction took 253966.16 ms. Allocated memory was 1.5 GB in the beginning and 3.4 GB in the end (delta: 1.9 GB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 58.0 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-09-28 10:00:19,119 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 0.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.15 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.88 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 436.13 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 253966.16 ms. Allocated memory was 1.5 GB in the beginning and 3.4 GB in the end (delta: 1.9 GB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 58.0 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 78). Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 69). Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 37]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 37). Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 58). Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 4 error locations. TIMEOUT Result, 253.8s OverallTime, 61 OverallIterations, 4 TraceHistogramMax, 190.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2153 SDtfs, 10752 SDslu, 7123 SDs, 0 SdLazy, 56865 SolverSat, 7360 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 56.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3335 GetRequests, 511 SyntacticMatches, 21 SemanticMatches, 2803 ConstructedPredicates, 0 IntricatePredicates, 8 DeprecatedPredicates, 75716 ImplicationChecksByTransitivity, 79.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6977occurred in iteration=57, 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: 42.8s AutomataMinimizationTime, 61 MinimizatonAttempts, 33087 StatesRemovedByMinimization, 60 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 17.8s InterpolantComputationTime, 1594 NumberOfCodeBlocks, 1594 NumberOfCodeBlocksAsserted, 124 NumberOfCheckSat, 1480 ConstructedInterpolants, 87 QuantifiedInterpolants, 145148 SizeOfPredicates, 236 NumberOfNonLiveVariables, 2412 ConjunctsInSsa, 507 ConjunctsInUnsatCore, 114 InterpolantComputations, 9 PerfectInterpolantSequences, 200/918 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/threadpooling_product_WithoutIf.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-28_10-00-19-133.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/threadpooling_product_WithoutIf.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-28_10-00-19-133.csv Completed graceful shutdown