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 0.1.23-4eac566 [2018-09-23 19:31:26,660 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 19:31:26,663 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 19:31:26,681 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 19:31:26,682 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 19:31:26,683 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 19:31:26,685 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 19:31:26,688 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 19:31:26,691 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 19:31:26,692 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 19:31:26,694 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-23 19:31:26,694 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-23 19:31:26,695 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-23 19:31:26,696 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-23 19:31:26,706 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-23 19:31:26,707 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-23 19:31:26,708 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-23 19:31:26,711 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-23 19:31:26,715 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-23 19:31:26,717 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-23 19:31:26,720 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-23 19:31:26,722 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-23 19:31:26,725 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-23 19:31:26,739 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 [2018-09-23 19:31:26,772 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 19:31:26,772 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 19:31:26,773 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 19:31:26,773 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 19:31:26,774 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 19:31:26,774 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 19:31:26,775 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 19:31:26,775 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 19:31:26,775 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 19:31:26,775 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 19:31:26,776 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 19:31:26,777 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 19:31:26,777 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 19:31:26,777 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 19:31:26,777 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 19:31:26,777 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 19:31:26,778 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 19:31:26,778 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 19:31:26,778 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 19:31:26,780 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 19:31:26,780 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 19:31:26,780 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 19:31:26,781 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:31:26,781 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 19:31:26,781 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 19:31:26,781 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 19:31:26,782 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 19:31:26,782 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 19:31:26,782 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 19:31:26,782 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 19:31:26,842 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 19:31:26,859 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 19:31:26,865 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 19:31:26,867 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 19:31:26,868 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 19:31:26,868 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/threadpooling_product_WithoutIf.bpl [2018-09-23 19:31:26,869 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/threadpooling_product_WithoutIf.bpl' [2018-09-23 19:31:26,939 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 19:31:26,943 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 19:31:26,944 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 19:31:26,944 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 19:31:26,944 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 19:31:26,966 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 23.09 07:31:26" (1/1) ... [2018-09-23 19:31:26,978 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 23.09 07:31:26" (1/1) ... [2018-09-23 19:31:26,983 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-23 19:31:26,983 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-23 19:31:26,984 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-23 19:31:26,986 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 19:31:26,987 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 19:31:26,987 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 19:31:26,987 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 19:31:26,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:31:26" (1/1) ... [2018-09-23 19:31:26,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:31:26" (1/1) ... [2018-09-23 19:31:26,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:31:26" (1/1) ... [2018-09-23 19:31:26,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:31:26" (1/1) ... [2018-09-23 19:31:27,002 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:31:26" (1/1) ... [2018-09-23 19:31:27,004 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:31:26" (1/1) ... [2018-09-23 19:31:27,005 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:31:26" (1/1) ... [2018-09-23 19:31:27,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 19:31:27,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 19:31:27,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 19:31:27,007 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 19:31:27,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:31:26" (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 [2018-09-23 19:31:27,068 INFO L124 BoogieDeclarations]: Specification and implementation of procedure product given in one single declaration [2018-09-23 19:31:27,068 INFO L130 BoogieDeclarations]: Found specification of procedure product [2018-09-23 19:31:27,068 INFO L138 BoogieDeclarations]: Found implementation of procedure product [2018-09-23 19:31:27,460 INFO L351 CfgBuilder]: Using library mode [2018-09-23 19:31:27,460 INFO L202 PluginConnector]: Adding new model threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:31:27 BoogieIcfgContainer [2018-09-23 19:31:27,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 19:31:27,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 19:31:27,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 19:31:27,465 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 19:31:27,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:31:26" (1/2) ... [2018-09-23 19:31:27,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3595bc88 and model type threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 07:31:27, skipping insertion in model container [2018-09-23 19:31:27,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:31:27" (2/2) ... [2018-09-23 19:31:27,469 INFO L112 eAbstractionObserver]: Analyzing ICFG threadpooling_product_WithoutIf.bpl [2018-09-23 19:31:27,477 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 19:31:27,485 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-09-23 19:31:27,532 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 19:31:27,533 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 19:31:27,533 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 19:31:27,533 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 19:31:27,533 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 19:31:27,533 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 19:31:27,534 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 19:31:27,534 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 19:31:27,534 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 19:31:27,550 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2018-09-23 19:31:27,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-23 19:31:27,557 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:27,558 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-23 19:31:27,559 INFO L423 AbstractCegarLoop]: === Iteration 1 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:27,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:27,567 INFO L82 PathProgramCache]: Analyzing trace with hash 927686, now seen corresponding path program 1 times [2018-09-23 19:31:27,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:27,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:27,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:27,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:27,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:27,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:27,768 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:31:27,769 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-23 19:31:27,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 19:31:27,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 19:31:27,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:31:27,787 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2018-09-23 19:31:28,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:28,278 INFO L93 Difference]: Finished difference Result 32 states and 51 transitions. [2018-09-23 19:31:28,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:31:28,280 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-09-23 19:31:28,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:28,293 INFO L225 Difference]: With dead ends: 32 [2018-09-23 19:31:28,294 INFO L226 Difference]: Without dead ends: 30 [2018-09-23 19:31:28,297 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 [2018-09-23 19:31:28,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-23 19:31:28,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2018-09-23 19:31:28,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:31:28,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 37 transitions. [2018-09-23 19:31:28,338 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 37 transitions. Word has length 4 [2018-09-23 19:31:28,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:28,339 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 37 transitions. [2018-09-23 19:31:28,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 19:31:28,339 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 37 transitions. [2018-09-23 19:31:28,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-23 19:31:28,340 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:28,340 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-23 19:31:28,340 INFO L423 AbstractCegarLoop]: === Iteration 2 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:28,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:28,341 INFO L82 PathProgramCache]: Analyzing trace with hash 930088, now seen corresponding path program 1 times [2018-09-23 19:31:28,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:28,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:28,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:28,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:28,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:28,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:28,410 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:31:28,410 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-23 19:31:28,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 19:31:28,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 19:31:28,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:31:28,413 INFO L87 Difference]: Start difference. First operand 24 states and 37 transitions. Second operand 5 states. [2018-09-23 19:31:28,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:28,758 INFO L93 Difference]: Finished difference Result 38 states and 61 transitions. [2018-09-23 19:31:28,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:31:28,762 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-09-23 19:31:28,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:28,763 INFO L225 Difference]: With dead ends: 38 [2018-09-23 19:31:28,764 INFO L226 Difference]: Without dead ends: 36 [2018-09-23 19:31:28,766 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 [2018-09-23 19:31:28,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-23 19:31:28,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2018-09-23 19:31:28,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:31:28,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 47 transitions. [2018-09-23 19:31:28,780 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 47 transitions. Word has length 4 [2018-09-23 19:31:28,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:28,780 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 47 transitions. [2018-09-23 19:31:28,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 19:31:28,781 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 47 transitions. [2018-09-23 19:31:28,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-23 19:31:28,782 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:28,782 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-23 19:31:28,783 INFO L423 AbstractCegarLoop]: === Iteration 3 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:28,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:28,783 INFO L82 PathProgramCache]: Analyzing trace with hash 28768015, now seen corresponding path program 1 times [2018-09-23 19:31:28,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:28,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:28,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:28,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:28,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:28,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:28,879 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:31:28,879 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-23 19:31:28,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 19:31:28,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 19:31:28,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:31:28,881 INFO L87 Difference]: Start difference. First operand 30 states and 47 transitions. Second operand 6 states. [2018-09-23 19:31:29,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:29,600 INFO L93 Difference]: Finished difference Result 43 states and 67 transitions. [2018-09-23 19:31:29,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:31:29,602 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-23 19:31:29,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:29,604 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:31:29,604 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:31:29,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:31:29,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:31:29,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2018-09-23 19:31:29,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-23 19:31:29,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 59 transitions. [2018-09-23 19:31:29,622 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 59 transitions. Word has length 5 [2018-09-23 19:31:29,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:29,623 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 59 transitions. [2018-09-23 19:31:29,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 19:31:29,623 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 59 transitions. [2018-09-23 19:31:29,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-23 19:31:29,625 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:29,625 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-23 19:31:29,626 INFO L423 AbstractCegarLoop]: === Iteration 4 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:29,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:29,626 INFO L82 PathProgramCache]: Analyzing trace with hash 28831153, now seen corresponding path program 1 times [2018-09-23 19:31:29,627 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:29,627 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:29,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:29,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:29,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:29,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:29,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:29,706 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:31:29,706 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-23 19:31:29,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 19:31:29,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 19:31:29,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:31:29,708 INFO L87 Difference]: Start difference. First operand 37 states and 59 transitions. Second operand 6 states. [2018-09-23 19:31:29,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:29,949 INFO L93 Difference]: Finished difference Result 54 states and 89 transitions. [2018-09-23 19:31:29,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:31:29,951 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-23 19:31:29,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:29,954 INFO L225 Difference]: With dead ends: 54 [2018-09-23 19:31:29,954 INFO L226 Difference]: Without dead ends: 52 [2018-09-23 19:31:29,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:31:29,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-23 19:31:29,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2018-09-23 19:31:29,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 19:31:29,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 70 transitions. [2018-09-23 19:31:29,977 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 70 transitions. Word has length 5 [2018-09-23 19:31:29,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:29,977 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 70 transitions. [2018-09-23 19:31:29,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 19:31:29,980 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 70 transitions. [2018-09-23 19:31:29,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 19:31:29,981 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:29,982 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:29,982 INFO L423 AbstractCegarLoop]: === Iteration 5 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:29,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:29,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1974033510, now seen corresponding path program 1 times [2018-09-23 19:31:29,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:29,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:29,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:29,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:29,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:30,181 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 11 [2018-09-23 19:31:30,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:30,267 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:30,267 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 [2018-09-23 19:31:30,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:30,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:30,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:30,806 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:30,806 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-23 19:31:30,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:31:30,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:31:30,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:31:30,807 INFO L87 Difference]: Start difference. First operand 43 states and 70 transitions. Second operand 14 states. [2018-09-23 19:31:32,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:32,197 INFO L93 Difference]: Finished difference Result 107 states and 168 transitions. [2018-09-23 19:31:32,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 19:31:32,198 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 8 [2018-09-23 19:31:32,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:32,200 INFO L225 Difference]: With dead ends: 107 [2018-09-23 19:31:32,200 INFO L226 Difference]: Without dead ends: 106 [2018-09-23 19:31:32,202 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 [2018-09-23 19:31:32,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-23 19:31:32,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 64. [2018-09-23 19:31:32,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-23 19:31:32,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 109 transitions. [2018-09-23 19:31:32,218 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 109 transitions. Word has length 8 [2018-09-23 19:31:32,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:32,218 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 109 transitions. [2018-09-23 19:31:32,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:31:32,219 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 109 transitions. [2018-09-23 19:31:32,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 19:31:32,220 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:32,220 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:32,220 INFO L423 AbstractCegarLoop]: === Iteration 6 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:32,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:32,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1974032228, now seen corresponding path program 1 times [2018-09-23 19:31:32,221 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:32,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:32,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:32,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:32,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:32,345 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:31:32,345 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-23 19:31:32,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:31:32,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:31:32,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:31:32,347 INFO L87 Difference]: Start difference. First operand 64 states and 109 transitions. Second operand 8 states. [2018-09-23 19:31:32,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:32,700 INFO L93 Difference]: Finished difference Result 95 states and 152 transitions. [2018-09-23 19:31:32,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 19:31:32,700 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-23 19:31:32,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:32,702 INFO L225 Difference]: With dead ends: 95 [2018-09-23 19:31:32,702 INFO L226 Difference]: Without dead ends: 93 [2018-09-23 19:31:32,703 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 [2018-09-23 19:31:32,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-23 19:31:32,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2018-09-23 19:31:32,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-23 19:31:32,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 134 transitions. [2018-09-23 19:31:32,720 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 134 transitions. Word has length 8 [2018-09-23 19:31:32,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:32,721 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 134 transitions. [2018-09-23 19:31:32,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:31:32,721 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 134 transitions. [2018-09-23 19:31:32,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 19:31:32,722 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:32,722 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:32,722 INFO L423 AbstractCegarLoop]: === Iteration 7 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:32,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:32,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1965445341, now seen corresponding path program 1 times [2018-09-23 19:31:32,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:32,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:32,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:32,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:32,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:32,792 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:32,792 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 [2018-09-23 19:31:32,800 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:32,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:32,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:32,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:33,011 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:33,011 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2018-09-23 19:31:33,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:31:33,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:31:33,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:31:33,012 INFO L87 Difference]: Start difference. First operand 77 states and 134 transitions. Second operand 13 states. [2018-09-23 19:31:34,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:34,706 INFO L93 Difference]: Finished difference Result 150 states and 246 transitions. [2018-09-23 19:31:34,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:31:34,711 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 8 [2018-09-23 19:31:34,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:34,713 INFO L225 Difference]: With dead ends: 150 [2018-09-23 19:31:34,713 INFO L226 Difference]: Without dead ends: 148 [2018-09-23 19:31:34,714 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 [2018-09-23 19:31:34,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-23 19:31:34,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 106. [2018-09-23 19:31:34,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-23 19:31:34,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 185 transitions. [2018-09-23 19:31:34,737 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 185 transitions. Word has length 8 [2018-09-23 19:31:34,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:34,738 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 185 transitions. [2018-09-23 19:31:34,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:31:34,738 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 185 transitions. [2018-09-23 19:31:34,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 19:31:34,739 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:34,739 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:34,740 INFO L423 AbstractCegarLoop]: === Iteration 8 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:34,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:34,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1965445053, now seen corresponding path program 1 times [2018-09-23 19:31:34,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:34,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:34,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:34,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:34,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:34,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:34,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:34,860 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:34,860 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 [2018-09-23 19:31:34,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:34,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:35,078 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:35,079 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2018-09-23 19:31:35,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:31:35,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:31:35,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:31:35,080 INFO L87 Difference]: Start difference. First operand 106 states and 185 transitions. Second operand 13 states. [2018-09-23 19:31:36,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:36,508 INFO L93 Difference]: Finished difference Result 137 states and 241 transitions. [2018-09-23 19:31:36,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:31:36,508 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 8 [2018-09-23 19:31:36,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:36,509 INFO L225 Difference]: With dead ends: 137 [2018-09-23 19:31:36,509 INFO L226 Difference]: Without dead ends: 135 [2018-09-23 19:31:36,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:31:36,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-23 19:31:36,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 111. [2018-09-23 19:31:36,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-23 19:31:36,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 194 transitions. [2018-09-23 19:31:36,533 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 194 transitions. Word has length 8 [2018-09-23 19:31:36,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:36,533 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 194 transitions. [2018-09-23 19:31:36,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:31:36,533 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 194 transitions. [2018-09-23 19:31:36,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 19:31:36,536 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:36,536 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:36,537 INFO L423 AbstractCegarLoop]: === Iteration 9 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:36,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:36,537 INFO L82 PathProgramCache]: Analyzing trace with hash 2040447037, now seen corresponding path program 1 times [2018-09-23 19:31:36,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:36,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:36,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:36,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:36,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:36,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:36,997 WARN L178 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 7 [2018-09-23 19:31:37,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:37,015 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:37,015 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:31:37,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:37,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:37,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:37,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2018-09-23 19:31:37,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:31:37,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:31:37,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:31:37,222 INFO L87 Difference]: Start difference. First operand 111 states and 194 transitions. Second operand 12 states. [2018-09-23 19:31:38,007 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-23 19:31:38,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:38,483 INFO L93 Difference]: Finished difference Result 211 states and 359 transitions. [2018-09-23 19:31:38,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 19:31:38,484 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 8 [2018-09-23 19:31:38,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:38,485 INFO L225 Difference]: With dead ends: 211 [2018-09-23 19:31:38,485 INFO L226 Difference]: Without dead ends: 209 [2018-09-23 19:31:38,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=292, Invalid=764, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:31:38,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-23 19:31:38,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 173. [2018-09-23 19:31:38,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-23 19:31:38,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 304 transitions. [2018-09-23 19:31:38,518 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 304 transitions. Word has length 8 [2018-09-23 19:31:38,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:38,518 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 304 transitions. [2018-09-23 19:31:38,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:31:38,519 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 304 transitions. [2018-09-23 19:31:38,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 19:31:38,519 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:38,520 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:38,520 INFO L423 AbstractCegarLoop]: === Iteration 10 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:38,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:38,520 INFO L82 PathProgramCache]: Analyzing trace with hash -84509544, now seen corresponding path program 1 times [2018-09-23 19:31:38,521 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:38,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:38,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:38,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:38,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:38,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:38,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:38,624 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:38,624 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 [2018-09-23 19:31:38,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:38,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:38,730 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:38,731 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-09-23 19:31:38,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:31:38,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:31:38,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:31:38,732 INFO L87 Difference]: Start difference. First operand 173 states and 304 transitions. Second operand 10 states. [2018-09-23 19:31:39,345 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2018-09-23 19:31:39,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:39,902 INFO L93 Difference]: Finished difference Result 246 states and 415 transitions. [2018-09-23 19:31:39,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 19:31:39,903 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 8 [2018-09-23 19:31:39,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:39,904 INFO L225 Difference]: With dead ends: 246 [2018-09-23 19:31:39,905 INFO L226 Difference]: Without dead ends: 245 [2018-09-23 19:31:39,905 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:31:39,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-09-23 19:31:39,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 201. [2018-09-23 19:31:39,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-23 19:31:39,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 358 transitions. [2018-09-23 19:31:39,940 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 358 transitions. Word has length 8 [2018-09-23 19:31:39,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:39,940 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 358 transitions. [2018-09-23 19:31:39,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:31:39,941 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 358 transitions. [2018-09-23 19:31:39,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 19:31:39,942 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:39,942 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:39,942 INFO L423 AbstractCegarLoop]: === Iteration 11 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:39,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:39,943 INFO L82 PathProgramCache]: Analyzing trace with hash -84508262, now seen corresponding path program 1 times [2018-09-23 19:31:39,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:39,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:39,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:39,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:39,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:40,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:40,079 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:40,079 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 [2018-09-23 19:31:40,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:40,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:40,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:40,123 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:40,124 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 19:31:40,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:31:40,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:31:40,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:31:40,125 INFO L87 Difference]: Start difference. First operand 201 states and 358 transitions. Second operand 7 states. [2018-09-23 19:31:40,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:40,612 INFO L93 Difference]: Finished difference Result 252 states and 436 transitions. [2018-09-23 19:31:40,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:31:40,616 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2018-09-23 19:31:40,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:40,617 INFO L225 Difference]: With dead ends: 252 [2018-09-23 19:31:40,618 INFO L226 Difference]: Without dead ends: 250 [2018-09-23 19:31:40,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:31:40,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2018-09-23 19:31:40,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 210. [2018-09-23 19:31:40,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-09-23 19:31:40,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 375 transitions. [2018-09-23 19:31:40,652 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 375 transitions. Word has length 8 [2018-09-23 19:31:40,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:40,653 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 375 transitions. [2018-09-23 19:31:40,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:31:40,653 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 375 transitions. [2018-09-23 19:31:40,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 19:31:40,654 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:40,654 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:40,654 INFO L423 AbstractCegarLoop]: === Iteration 12 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:40,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:40,655 INFO L82 PathProgramCache]: Analyzing trace with hash -75921375, now seen corresponding path program 1 times [2018-09-23 19:31:40,655 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:40,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:40,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:40,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:40,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:40,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:40,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:40,766 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:40,766 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 [2018-09-23 19:31:40,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:40,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:40,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:40,839 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:40,839 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-09-23 19:31:40,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:31:40,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:31:40,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:31:40,840 INFO L87 Difference]: Start difference. First operand 210 states and 375 transitions. Second operand 10 states. [2018-09-23 19:31:41,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:41,188 INFO L93 Difference]: Finished difference Result 260 states and 452 transitions. [2018-09-23 19:31:41,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:31:41,192 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 8 [2018-09-23 19:31:41,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:41,194 INFO L225 Difference]: With dead ends: 260 [2018-09-23 19:31:41,194 INFO L226 Difference]: Without dead ends: 259 [2018-09-23 19:31:41,195 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 [2018-09-23 19:31:41,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-09-23 19:31:41,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 229. [2018-09-23 19:31:41,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-09-23 19:31:41,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 409 transitions. [2018-09-23 19:31:41,232 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 409 transitions. Word has length 8 [2018-09-23 19:31:41,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:41,232 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 409 transitions. [2018-09-23 19:31:41,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:31:41,232 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 409 transitions. [2018-09-23 19:31:41,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 19:31:41,233 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:41,233 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:41,234 INFO L423 AbstractCegarLoop]: === Iteration 13 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:41,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:41,234 INFO L82 PathProgramCache]: Analyzing trace with hash -75920285, now seen corresponding path program 1 times [2018-09-23 19:31:41,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:41,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:41,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:41,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:41,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:41,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:41,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:41,312 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:31:41,313 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-23 19:31:41,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:31:41,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:31:41,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:31:41,314 INFO L87 Difference]: Start difference. First operand 229 states and 409 transitions. Second operand 7 states. [2018-09-23 19:31:42,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:42,014 INFO L93 Difference]: Finished difference Result 316 states and 557 transitions. [2018-09-23 19:31:42,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:31:42,014 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2018-09-23 19:31:42,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:42,016 INFO L225 Difference]: With dead ends: 316 [2018-09-23 19:31:42,016 INFO L226 Difference]: Without dead ends: 314 [2018-09-23 19:31:42,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:31:42,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2018-09-23 19:31:42,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 245. [2018-09-23 19:31:42,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-09-23 19:31:42,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 438 transitions. [2018-09-23 19:31:42,064 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 438 transitions. Word has length 8 [2018-09-23 19:31:42,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:42,064 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 438 transitions. [2018-09-23 19:31:42,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:31:42,064 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 438 transitions. [2018-09-23 19:31:42,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 19:31:42,065 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:42,067 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:42,067 INFO L423 AbstractCegarLoop]: === Iteration 14 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:42,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:42,069 INFO L82 PathProgramCache]: Analyzing trace with hash -35778354, now seen corresponding path program 1 times [2018-09-23 19:31:42,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:42,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:42,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:42,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:42,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:42,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:42,168 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:42,168 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 [2018-09-23 19:31:42,176 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:42,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:42,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:42,219 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:42,219 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 19:31:42,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:31:42,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:31:42,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:31:42,220 INFO L87 Difference]: Start difference. First operand 245 states and 438 transitions. Second operand 7 states. [2018-09-23 19:31:42,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:42,592 INFO L93 Difference]: Finished difference Result 428 states and 767 transitions. [2018-09-23 19:31:42,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:31:42,593 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2018-09-23 19:31:42,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:42,595 INFO L225 Difference]: With dead ends: 428 [2018-09-23 19:31:42,595 INFO L226 Difference]: Without dead ends: 426 [2018-09-23 19:31:42,596 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 [2018-09-23 19:31:42,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2018-09-23 19:31:42,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 345. [2018-09-23 19:31:42,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2018-09-23 19:31:42,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 622 transitions. [2018-09-23 19:31:42,661 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 622 transitions. Word has length 8 [2018-09-23 19:31:42,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:42,661 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 622 transitions. [2018-09-23 19:31:42,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:31:42,661 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 622 transitions. [2018-09-23 19:31:42,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:31:42,662 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:42,662 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:42,662 INFO L423 AbstractCegarLoop]: === Iteration 15 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:42,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:42,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1740000584, now seen corresponding path program 1 times [2018-09-23 19:31:42,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:42,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:42,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:42,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:42,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:42,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:42,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:42,856 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:42,856 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 [2018-09-23 19:31:42,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:42,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:42,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:42,931 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:42,932 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-09-23 19:31:42,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:31:42,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:31:42,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:31:42,932 INFO L87 Difference]: Start difference. First operand 345 states and 622 transitions. Second operand 10 states. [2018-09-23 19:31:44,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:44,114 INFO L93 Difference]: Finished difference Result 466 states and 826 transitions. [2018-09-23 19:31:44,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 19:31:44,114 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2018-09-23 19:31:44,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:44,117 INFO L225 Difference]: With dead ends: 466 [2018-09-23 19:31:44,117 INFO L226 Difference]: Without dead ends: 464 [2018-09-23 19:31:44,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:31:44,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2018-09-23 19:31:44,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 351. [2018-09-23 19:31:44,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-09-23 19:31:44,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 634 transitions. [2018-09-23 19:31:44,198 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 634 transitions. Word has length 11 [2018-09-23 19:31:44,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:44,198 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 634 transitions. [2018-09-23 19:31:44,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:31:44,199 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 634 transitions. [2018-09-23 19:31:44,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:31:44,199 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:44,200 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:44,200 INFO L423 AbstractCegarLoop]: === Iteration 16 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:44,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:44,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1701828094, now seen corresponding path program 1 times [2018-09-23 19:31:44,200 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:44,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:44,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:44,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:44,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:44,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:44,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:44,837 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:44,837 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 [2018-09-23 19:31:44,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:44,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:44,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:44,951 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:31:44,951 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 14 [2018-09-23 19:31:44,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:31:44,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:31:44,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:31:44,952 INFO L87 Difference]: Start difference. First operand 351 states and 634 transitions. Second operand 14 states. [2018-09-23 19:31:47,372 WARN L178 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2018-09-23 19:31:47,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:47,797 INFO L93 Difference]: Finished difference Result 859 states and 1521 transitions. [2018-09-23 19:31:47,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 19:31:47,798 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2018-09-23 19:31:47,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:47,800 INFO L225 Difference]: With dead ends: 859 [2018-09-23 19:31:47,800 INFO L226 Difference]: Without dead ends: 509 [2018-09-23 19:31:47,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=375, Invalid=1881, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:31:47,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2018-09-23 19:31:47,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 388. [2018-09-23 19:31:47,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-09-23 19:31:47,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 697 transitions. [2018-09-23 19:31:47,888 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 697 transitions. Word has length 11 [2018-09-23 19:31:47,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:47,889 INFO L480 AbstractCegarLoop]: Abstraction has 388 states and 697 transitions. [2018-09-23 19:31:47,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:31:47,889 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 697 transitions. [2018-09-23 19:31:47,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:31:47,890 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:47,890 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:47,890 INFO L423 AbstractCegarLoop]: === Iteration 17 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:47,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:47,891 INFO L82 PathProgramCache]: Analyzing trace with hash 707064552, now seen corresponding path program 1 times [2018-09-23 19:31:47,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:47,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:47,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:47,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:47,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:48,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:48,038 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:31:48,038 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-23 19:31:48,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:31:48,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:31:48,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:31:48,039 INFO L87 Difference]: Start difference. First operand 388 states and 697 transitions. Second operand 8 states. [2018-09-23 19:31:48,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:48,561 INFO L93 Difference]: Finished difference Result 481 states and 848 transitions. [2018-09-23 19:31:48,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:31:48,562 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2018-09-23 19:31:48,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:48,564 INFO L225 Difference]: With dead ends: 481 [2018-09-23 19:31:48,564 INFO L226 Difference]: Without dead ends: 479 [2018-09-23 19:31:48,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:31:48,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2018-09-23 19:31:48,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 394. [2018-09-23 19:31:48,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2018-09-23 19:31:48,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 703 transitions. [2018-09-23 19:31:48,655 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 703 transitions. Word has length 11 [2018-09-23 19:31:48,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:48,656 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 703 transitions. [2018-09-23 19:31:48,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:31:48,656 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 703 transitions. [2018-09-23 19:31:48,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:31:48,657 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:48,657 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:48,657 INFO L423 AbstractCegarLoop]: === Iteration 18 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:48,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:48,658 INFO L82 PathProgramCache]: Analyzing trace with hash 739509354, now seen corresponding path program 1 times [2018-09-23 19:31:48,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:48,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:48,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:48,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:48,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:48,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:48,805 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:48,806 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 [2018-09-23 19:31:48,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:48,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:48,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:48,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:48,953 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:48,953 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2018-09-23 19:31:48,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:31:48,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:31:48,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:31:48,954 INFO L87 Difference]: Start difference. First operand 394 states and 703 transitions. Second operand 13 states. [2018-09-23 19:31:49,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:49,950 INFO L93 Difference]: Finished difference Result 952 states and 1676 transitions. [2018-09-23 19:31:49,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:31:49,950 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2018-09-23 19:31:49,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:49,952 INFO L225 Difference]: With dead ends: 952 [2018-09-23 19:31:49,953 INFO L226 Difference]: Without dead ends: 559 [2018-09-23 19:31:49,954 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 [2018-09-23 19:31:49,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2018-09-23 19:31:50,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 473. [2018-09-23 19:31:50,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 473 states. [2018-09-23 19:31:50,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 835 transitions. [2018-09-23 19:31:50,056 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 835 transitions. Word has length 11 [2018-09-23 19:31:50,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:50,056 INFO L480 AbstractCegarLoop]: Abstraction has 473 states and 835 transitions. [2018-09-23 19:31:50,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:31:50,056 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 835 transitions. [2018-09-23 19:31:50,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:31:50,057 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:50,057 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:50,057 INFO L423 AbstractCegarLoop]: === Iteration 19 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:50,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:50,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1106731073, now seen corresponding path program 1 times [2018-09-23 19:31:50,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:50,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:50,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:50,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:50,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:50,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:50,512 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:31:50,512 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-23 19:31:50,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:31:50,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:31:50,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:31:50,513 INFO L87 Difference]: Start difference. First operand 473 states and 835 transitions. Second operand 8 states. [2018-09-23 19:31:51,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:51,018 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2018-09-23 19:31:51,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:31:51,019 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2018-09-23 19:31:51,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:51,021 INFO L225 Difference]: With dead ends: 524 [2018-09-23 19:31:51,022 INFO L226 Difference]: Without dead ends: 522 [2018-09-23 19:31:51,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:31:51,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2018-09-23 19:31:51,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 485. [2018-09-23 19:31:51,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 485 states. [2018-09-23 19:31:51,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 855 transitions. [2018-09-23 19:31:51,131 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 855 transitions. Word has length 11 [2018-09-23 19:31:51,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:51,131 INFO L480 AbstractCegarLoop]: Abstraction has 485 states and 855 transitions. [2018-09-23 19:31:51,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:31:51,131 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 855 transitions. [2018-09-23 19:31:51,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:31:51,132 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:51,132 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:51,133 INFO L423 AbstractCegarLoop]: === Iteration 20 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:51,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:51,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1098144186, now seen corresponding path program 1 times [2018-09-23 19:31:51,133 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:51,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:51,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:51,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:51,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:51,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:51,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:51,594 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 [2018-09-23 19:31:51,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:51,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:51,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:51,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:52,004 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:52,004 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-09-23 19:31:52,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:31:52,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:31:52,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:31:52,005 INFO L87 Difference]: Start difference. First operand 485 states and 855 transitions. Second operand 9 states. [2018-09-23 19:31:52,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:52,717 INFO L93 Difference]: Finished difference Result 556 states and 964 transitions. [2018-09-23 19:31:52,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 19:31:52,720 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2018-09-23 19:31:52,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:52,722 INFO L225 Difference]: With dead ends: 556 [2018-09-23 19:31:52,722 INFO L226 Difference]: Without dead ends: 554 [2018-09-23 19:31:52,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:31:52,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2018-09-23 19:31:52,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 489. [2018-09-23 19:31:52,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2018-09-23 19:31:52,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 861 transitions. [2018-09-23 19:31:52,821 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 861 transitions. Word has length 11 [2018-09-23 19:31:52,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:52,821 INFO L480 AbstractCegarLoop]: Abstraction has 489 states and 861 transitions. [2018-09-23 19:31:52,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:31:52,821 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 861 transitions. [2018-09-23 19:31:52,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:31:52,822 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:52,822 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:52,822 INFO L423 AbstractCegarLoop]: === Iteration 21 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:52,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:52,823 INFO L82 PathProgramCache]: Analyzing trace with hash -772910566, now seen corresponding path program 1 times [2018-09-23 19:31:52,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:52,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:52,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:52,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:52,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:52,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:52,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:52,902 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 [2018-09-23 19:31:52,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:52,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:53,047 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:53,047 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 12 [2018-09-23 19:31:53,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:31:53,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:31:53,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:31:53,048 INFO L87 Difference]: Start difference. First operand 489 states and 861 transitions. Second operand 13 states. [2018-09-23 19:31:54,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:54,011 INFO L93 Difference]: Finished difference Result 631 states and 1077 transitions. [2018-09-23 19:31:54,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 19:31:54,012 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2018-09-23 19:31:54,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:54,014 INFO L225 Difference]: With dead ends: 631 [2018-09-23 19:31:54,014 INFO L226 Difference]: Without dead ends: 629 [2018-09-23 19:31:54,015 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 [2018-09-23 19:31:54,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2018-09-23 19:31:54,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 513. [2018-09-23 19:31:54,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2018-09-23 19:31:54,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 904 transitions. [2018-09-23 19:31:54,132 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 904 transitions. Word has length 11 [2018-09-23 19:31:54,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:54,132 INFO L480 AbstractCegarLoop]: Abstraction has 513 states and 904 transitions. [2018-09-23 19:31:54,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:31:54,132 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 904 transitions. [2018-09-23 19:31:54,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:31:54,133 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:54,133 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:54,133 INFO L423 AbstractCegarLoop]: === Iteration 22 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:54,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:54,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1674153000, now seen corresponding path program 2 times [2018-09-23 19:31:54,134 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:54,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:54,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:54,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:54,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:54,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:54,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:54,266 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 [2018-09-23 19:31:54,274 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:31:54,281 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:31:54,281 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:54,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:54,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:54,304 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:54,305 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:31:54,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:31:54,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:31:54,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:31:54,305 INFO L87 Difference]: Start difference. First operand 513 states and 904 transitions. Second operand 7 states. [2018-09-23 19:31:54,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:54,868 INFO L93 Difference]: Finished difference Result 601 states and 1040 transitions. [2018-09-23 19:31:54,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:31:54,871 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-23 19:31:54,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:54,873 INFO L225 Difference]: With dead ends: 601 [2018-09-23 19:31:54,873 INFO L226 Difference]: Without dead ends: 599 [2018-09-23 19:31:54,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:31:54,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2018-09-23 19:31:54,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 509. [2018-09-23 19:31:54,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 509 states. [2018-09-23 19:31:54,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 898 transitions. [2018-09-23 19:31:54,964 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 898 transitions. Word has length 11 [2018-09-23 19:31:54,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:54,964 INFO L480 AbstractCegarLoop]: Abstraction has 509 states and 898 transitions. [2018-09-23 19:31:54,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:31:54,965 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 898 transitions. [2018-09-23 19:31:54,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:31:54,965 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:54,965 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:54,966 INFO L423 AbstractCegarLoop]: === Iteration 23 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:54,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:54,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1682742259, now seen corresponding path program 1 times [2018-09-23 19:31:54,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:54,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:54,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:54,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:54,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:55,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:55,077 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:55,077 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:31:55,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:55,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:55,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:55,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:55,128 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:55,128 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:31:55,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:31:55,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:31:55,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:31:55,129 INFO L87 Difference]: Start difference. First operand 509 states and 898 transitions. Second operand 7 states. [2018-09-23 19:31:55,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:55,626 INFO L93 Difference]: Finished difference Result 624 states and 1088 transitions. [2018-09-23 19:31:55,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 19:31:55,626 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-23 19:31:55,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:55,628 INFO L225 Difference]: With dead ends: 624 [2018-09-23 19:31:55,628 INFO L226 Difference]: Without dead ends: 622 [2018-09-23 19:31:55,629 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 [2018-09-23 19:31:55,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2018-09-23 19:31:55,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 538. [2018-09-23 19:31:55,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 538 states. [2018-09-23 19:31:55,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 949 transitions. [2018-09-23 19:31:55,722 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 949 transitions. Word has length 11 [2018-09-23 19:31:55,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:55,722 INFO L480 AbstractCegarLoop]: Abstraction has 538 states and 949 transitions. [2018-09-23 19:31:55,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:31:55,723 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 949 transitions. [2018-09-23 19:31:55,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:31:55,723 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:55,724 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:55,724 INFO L423 AbstractCegarLoop]: === Iteration 24 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:55,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:55,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1927251354, now seen corresponding path program 1 times [2018-09-23 19:31:55,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:55,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:55,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:55,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:55,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:55,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:55,835 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:55,835 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:31:55,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:55,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:55,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:55,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:55,872 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:55,873 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:31:55,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:31:55,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:31:55,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:31:55,873 INFO L87 Difference]: Start difference. First operand 538 states and 949 transitions. Second operand 7 states. [2018-09-23 19:31:56,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:56,352 INFO L93 Difference]: Finished difference Result 584 states and 1012 transitions. [2018-09-23 19:31:56,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:31:56,352 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-23 19:31:56,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:56,354 INFO L225 Difference]: With dead ends: 584 [2018-09-23 19:31:56,354 INFO L226 Difference]: Without dead ends: 582 [2018-09-23 19:31:56,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:31:56,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2018-09-23 19:31:56,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 543. [2018-09-23 19:31:56,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2018-09-23 19:31:56,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 956 transitions. [2018-09-23 19:31:56,457 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 956 transitions. Word has length 11 [2018-09-23 19:31:56,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:56,458 INFO L480 AbstractCegarLoop]: Abstraction has 543 states and 956 transitions. [2018-09-23 19:31:56,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:31:56,458 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 956 transitions. [2018-09-23 19:31:56,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:31:56,458 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:56,458 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:56,459 INFO L423 AbstractCegarLoop]: === Iteration 25 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:56,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:56,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1918662095, now seen corresponding path program 1 times [2018-09-23 19:31:56,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:56,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:56,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:56,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:56,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:56,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:56,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:56,518 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:56,518 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 [2018-09-23 19:31:56,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:56,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:56,556 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:56,557 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:31:56,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:31:56,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:31:56,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:31:56,557 INFO L87 Difference]: Start difference. First operand 543 states and 956 transitions. Second operand 7 states. [2018-09-23 19:31:56,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:56,982 INFO L93 Difference]: Finished difference Result 618 states and 1074 transitions. [2018-09-23 19:31:56,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 19:31:56,983 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-23 19:31:56,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:56,985 INFO L225 Difference]: With dead ends: 618 [2018-09-23 19:31:56,985 INFO L226 Difference]: Without dead ends: 616 [2018-09-23 19:31:56,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:31:56,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2018-09-23 19:31:57,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 529. [2018-09-23 19:31:57,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 529 states. [2018-09-23 19:31:57,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 929 transitions. [2018-09-23 19:31:57,082 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 929 transitions. Word has length 11 [2018-09-23 19:31:57,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:57,082 INFO L480 AbstractCegarLoop]: Abstraction has 529 states and 929 transitions. [2018-09-23 19:31:57,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:31:57,082 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 929 transitions. [2018-09-23 19:31:57,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:31:57,083 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:57,083 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:57,083 INFO L423 AbstractCegarLoop]: === Iteration 26 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:57,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:57,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1878520164, now seen corresponding path program 1 times [2018-09-23 19:31:57,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:57,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:57,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:57,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:57,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:57,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:57,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:57,147 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:57,147 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 [2018-09-23 19:31:57,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:57,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:57,185 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:57,186 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:31:57,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:31:57,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:31:57,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:31:57,186 INFO L87 Difference]: Start difference. First operand 529 states and 929 transitions. Second operand 7 states. [2018-09-23 19:31:57,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:57,603 INFO L93 Difference]: Finished difference Result 613 states and 1066 transitions. [2018-09-23 19:31:57,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:31:57,604 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-23 19:31:57,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:57,607 INFO L225 Difference]: With dead ends: 613 [2018-09-23 19:31:57,607 INFO L226 Difference]: Without dead ends: 611 [2018-09-23 19:31:57,608 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 [2018-09-23 19:31:57,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2018-09-23 19:31:57,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 523. [2018-09-23 19:31:57,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 523 states. [2018-09-23 19:31:57,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 914 transitions. [2018-09-23 19:31:57,712 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 914 transitions. Word has length 11 [2018-09-23 19:31:57,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:57,712 INFO L480 AbstractCegarLoop]: Abstraction has 523 states and 914 transitions. [2018-09-23 19:31:57,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:31:57,713 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 914 transitions. [2018-09-23 19:31:57,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 19:31:57,713 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:57,713 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:57,714 INFO L423 AbstractCegarLoop]: === Iteration 27 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:57,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:57,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1730497723, now seen corresponding path program 1 times [2018-09-23 19:31:57,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:57,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:57,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:57,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:57,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:57,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:57,803 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:57,804 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:57,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:57,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:57,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:57,920 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:57,921 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2018-09-23 19:31:57,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:31:57,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:31:57,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:31:57,921 INFO L87 Difference]: Start difference. First operand 523 states and 914 transitions. Second operand 12 states. [2018-09-23 19:31:58,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:58,912 INFO L93 Difference]: Finished difference Result 875 states and 1523 transitions. [2018-09-23 19:31:58,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 19:31:58,912 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-23 19:31:58,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:58,916 INFO L225 Difference]: With dead ends: 875 [2018-09-23 19:31:58,916 INFO L226 Difference]: Without dead ends: 873 [2018-09-23 19:31:58,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:31:58,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2018-09-23 19:31:59,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 651. [2018-09-23 19:31:59,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2018-09-23 19:31:59,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1146 transitions. [2018-09-23 19:31:59,032 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1146 transitions. Word has length 12 [2018-09-23 19:31:59,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:59,033 INFO L480 AbstractCegarLoop]: Abstraction has 651 states and 1146 transitions. [2018-09-23 19:31:59,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:31:59,033 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1146 transitions. [2018-09-23 19:31:59,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 19:31:59,034 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:59,034 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:59,034 INFO L423 AbstractCegarLoop]: === Iteration 28 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:59,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:59,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1895489947, now seen corresponding path program 1 times [2018-09-23 19:31:59,035 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:59,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:59,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:59,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:59,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:59,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:59,124 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:59,124 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:31:59,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:59,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:59,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:59,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:59,217 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:59,217 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-09-23 19:31:59,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:31:59,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:31:59,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:31:59,218 INFO L87 Difference]: Start difference. First operand 651 states and 1146 transitions. Second operand 13 states. [2018-09-23 19:32:00,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:00,586 INFO L93 Difference]: Finished difference Result 1281 states and 2254 transitions. [2018-09-23 19:32:00,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 19:32:00,586 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-09-23 19:32:00,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:00,591 INFO L225 Difference]: With dead ends: 1281 [2018-09-23 19:32:00,591 INFO L226 Difference]: Without dead ends: 1279 [2018-09-23 19:32:00,592 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 [2018-09-23 19:32:00,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2018-09-23 19:32:00,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 923. [2018-09-23 19:32:00,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 923 states. [2018-09-23 19:32:00,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1627 transitions. [2018-09-23 19:32:00,776 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1627 transitions. Word has length 12 [2018-09-23 19:32:00,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:00,776 INFO L480 AbstractCegarLoop]: Abstraction has 923 states and 1627 transitions. [2018-09-23 19:32:00,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:32:00,776 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1627 transitions. [2018-09-23 19:32:00,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 19:32:00,777 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:00,777 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:00,777 INFO L423 AbstractCegarLoop]: === Iteration 29 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:00,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:00,778 INFO L82 PathProgramCache]: Analyzing trace with hash -397030605, now seen corresponding path program 1 times [2018-09-23 19:32:00,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:00,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:00,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:00,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:00,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:00,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:00,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:00,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:00,952 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 [2018-09-23 19:32:00,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:00,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:01,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:01,051 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:01,051 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-09-23 19:32:01,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:32:01,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:32:01,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:32:01,052 INFO L87 Difference]: Start difference. First operand 923 states and 1627 transitions. Second operand 11 states. [2018-09-23 19:32:01,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:01,833 INFO L93 Difference]: Finished difference Result 1054 states and 1838 transitions. [2018-09-23 19:32:01,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:32:01,833 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2018-09-23 19:32:01,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:01,837 INFO L225 Difference]: With dead ends: 1054 [2018-09-23 19:32:01,837 INFO L226 Difference]: Without dead ends: 1052 [2018-09-23 19:32:01,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:32:01,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2018-09-23 19:32:02,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 933. [2018-09-23 19:32:02,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 933 states. [2018-09-23 19:32:02,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1644 transitions. [2018-09-23 19:32:02,016 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1644 transitions. Word has length 14 [2018-09-23 19:32:02,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:02,016 INFO L480 AbstractCegarLoop]: Abstraction has 933 states and 1644 transitions. [2018-09-23 19:32:02,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:32:02,017 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1644 transitions. [2018-09-23 19:32:02,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 19:32:02,018 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:02,018 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:02,018 INFO L423 AbstractCegarLoop]: === Iteration 30 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:02,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:02,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1593749093, now seen corresponding path program 2 times [2018-09-23 19:32:02,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:02,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:02,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:02,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:02,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:02,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:02,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:02,306 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:02,306 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 [2018-09-23 19:32:02,314 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:32:02,320 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:32:02,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:02,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:02,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:02,397 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:02,397 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2018-09-23 19:32:02,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:32:02,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:32:02,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:32:02,398 INFO L87 Difference]: Start difference. First operand 933 states and 1644 transitions. Second operand 12 states. [2018-09-23 19:32:03,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:03,532 INFO L93 Difference]: Finished difference Result 1125 states and 1938 transitions. [2018-09-23 19:32:03,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:32:03,533 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2018-09-23 19:32:03,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:03,537 INFO L225 Difference]: With dead ends: 1125 [2018-09-23 19:32:03,537 INFO L226 Difference]: Without dead ends: 1123 [2018-09-23 19:32:03,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:32:03,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2018-09-23 19:32:03,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 923. [2018-09-23 19:32:03,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 923 states. [2018-09-23 19:32:03,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1627 transitions. [2018-09-23 19:32:03,709 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1627 transitions. Word has length 14 [2018-09-23 19:32:03,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:03,709 INFO L480 AbstractCegarLoop]: Abstraction has 923 states and 1627 transitions. [2018-09-23 19:32:03,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:32:03,709 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1627 transitions. [2018-09-23 19:32:03,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 19:32:03,710 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:03,710 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:03,710 INFO L423 AbstractCegarLoop]: === Iteration 31 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:03,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:03,711 INFO L82 PathProgramCache]: Analyzing trace with hash -213121378, now seen corresponding path program 1 times [2018-09-23 19:32:03,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:03,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:03,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:03,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:03,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:03,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:03,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:03,813 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:03,813 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 [2018-09-23 19:32:03,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:03,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:03,916 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:03,940 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:03,940 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2018-09-23 19:32:03,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:32:03,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:32:03,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:32:03,941 INFO L87 Difference]: Start difference. First operand 923 states and 1627 transitions. Second operand 14 states. [2018-09-23 19:32:05,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:05,337 INFO L93 Difference]: Finished difference Result 1125 states and 1949 transitions. [2018-09-23 19:32:05,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:32:05,338 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-23 19:32:05,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:05,342 INFO L225 Difference]: With dead ends: 1125 [2018-09-23 19:32:05,342 INFO L226 Difference]: Without dead ends: 1123 [2018-09-23 19:32:05,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=266, Invalid=1066, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:32:05,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2018-09-23 19:32:05,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 919. [2018-09-23 19:32:05,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 919 states. [2018-09-23 19:32:05,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1620 transitions. [2018-09-23 19:32:05,532 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1620 transitions. Word has length 14 [2018-09-23 19:32:05,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:05,532 INFO L480 AbstractCegarLoop]: Abstraction has 919 states and 1620 transitions. [2018-09-23 19:32:05,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:32:05,533 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1620 transitions. [2018-09-23 19:32:05,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 19:32:05,533 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:05,533 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:05,534 INFO L423 AbstractCegarLoop]: === Iteration 32 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:05,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:05,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1838595071, now seen corresponding path program 1 times [2018-09-23 19:32:05,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:05,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:05,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:05,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:05,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:05,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:05,835 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:05,836 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:05,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:05,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:05,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:05,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:05,918 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:05,918 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2018-09-23 19:32:05,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:32:05,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:32:05,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:32:05,919 INFO L87 Difference]: Start difference. First operand 919 states and 1620 transitions. Second operand 12 states. [2018-09-23 19:32:06,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:06,892 INFO L93 Difference]: Finished difference Result 1117 states and 1948 transitions. [2018-09-23 19:32:06,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 19:32:06,892 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2018-09-23 19:32:06,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:06,896 INFO L225 Difference]: With dead ends: 1117 [2018-09-23 19:32:06,896 INFO L226 Difference]: Without dead ends: 1115 [2018-09-23 19:32:06,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:32:06,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2018-09-23 19:32:07,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 883. [2018-09-23 19:32:07,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2018-09-23 19:32:07,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1560 transitions. [2018-09-23 19:32:07,089 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1560 transitions. Word has length 14 [2018-09-23 19:32:07,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:07,089 INFO L480 AbstractCegarLoop]: Abstraction has 883 states and 1560 transitions. [2018-09-23 19:32:07,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:32:07,089 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1560 transitions. [2018-09-23 19:32:07,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 19:32:07,090 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:07,090 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:07,091 INFO L423 AbstractCegarLoop]: === Iteration 33 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:07,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:07,091 INFO L82 PathProgramCache]: Analyzing trace with hash -47479579, now seen corresponding path program 1 times [2018-09-23 19:32:07,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:07,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:07,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:07,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:07,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:07,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:07,763 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:07,763 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 [2018-09-23 19:32:07,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:07,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:07,895 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:07,895 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-09-23 19:32:07,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:32:07,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:32:07,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:32:07,896 INFO L87 Difference]: Start difference. First operand 883 states and 1560 transitions. Second operand 11 states. [2018-09-23 19:32:08,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:08,661 INFO L93 Difference]: Finished difference Result 995 states and 1722 transitions. [2018-09-23 19:32:08,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 19:32:08,661 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2018-09-23 19:32:08,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:08,665 INFO L225 Difference]: With dead ends: 995 [2018-09-23 19:32:08,665 INFO L226 Difference]: Without dead ends: 993 [2018-09-23 19:32:08,665 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:32:08,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2018-09-23 19:32:08,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 877. [2018-09-23 19:32:08,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 877 states. [2018-09-23 19:32:08,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1548 transitions. [2018-09-23 19:32:08,850 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1548 transitions. Word has length 14 [2018-09-23 19:32:08,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:08,850 INFO L480 AbstractCegarLoop]: Abstraction has 877 states and 1548 transitions. [2018-09-23 19:32:08,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:32:08,850 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1548 transitions. [2018-09-23 19:32:08,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:32:08,851 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:08,851 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2018-09-23 19:32:08,851 INFO L423 AbstractCegarLoop]: === Iteration 34 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:08,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:08,852 INFO L82 PathProgramCache]: Analyzing trace with hash 2027388784, now seen corresponding path program 1 times [2018-09-23 19:32:08,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:08,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:08,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:08,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:08,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:08,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:09,029 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:09,029 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:09,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:09,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:09,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:09,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:09,165 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:09,186 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:09,187 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2018-09-23 19:32:09,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:32:09,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:32:09,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:32:09,187 INFO L87 Difference]: Start difference. First operand 877 states and 1548 transitions. Second operand 17 states. [2018-09-23 19:32:11,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:11,690 INFO L93 Difference]: Finished difference Result 2105 states and 3670 transitions. [2018-09-23 19:32:11,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 19:32:11,691 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 15 [2018-09-23 19:32:11,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:11,695 INFO L225 Difference]: With dead ends: 2105 [2018-09-23 19:32:11,695 INFO L226 Difference]: Without dead ends: 1229 [2018-09-23 19:32:11,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=635, Invalid=2557, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:32:11,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2018-09-23 19:32:11,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1014. [2018-09-23 19:32:11,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1014 states. [2018-09-23 19:32:11,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 1752 transitions. [2018-09-23 19:32:11,899 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 1752 transitions. Word has length 15 [2018-09-23 19:32:11,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:11,899 INFO L480 AbstractCegarLoop]: Abstraction has 1014 states and 1752 transitions. [2018-09-23 19:32:11,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:32:11,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 1752 transitions. [2018-09-23 19:32:11,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:32:11,900 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:11,900 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:11,900 INFO L423 AbstractCegarLoop]: === Iteration 35 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:11,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:11,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1084233543, now seen corresponding path program 1 times [2018-09-23 19:32:11,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:11,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:11,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:11,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:11,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:11,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:12,012 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:12,013 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 [2018-09-23 19:32:12,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:12,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:12,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:12,149 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:12,150 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2018-09-23 19:32:12,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:32:12,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:32:12,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:32:12,151 INFO L87 Difference]: Start difference. First operand 1014 states and 1752 transitions. Second operand 15 states. [2018-09-23 19:32:12,971 WARN L178 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2018-09-23 19:32:14,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:14,387 INFO L93 Difference]: Finished difference Result 2110 states and 3623 transitions. [2018-09-23 19:32:14,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 19:32:14,387 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-23 19:32:14,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:14,391 INFO L225 Difference]: With dead ends: 2110 [2018-09-23 19:32:14,391 INFO L226 Difference]: Without dead ends: 1097 [2018-09-23 19:32:14,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=426, Invalid=2024, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:32:14,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2018-09-23 19:32:14,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 951. [2018-09-23 19:32:14,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 951 states. [2018-09-23 19:32:14,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1643 transitions. [2018-09-23 19:32:14,605 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 1643 transitions. Word has length 15 [2018-09-23 19:32:14,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:14,605 INFO L480 AbstractCegarLoop]: Abstraction has 951 states and 1643 transitions. [2018-09-23 19:32:14,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:32:14,605 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 1643 transitions. [2018-09-23 19:32:14,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:32:14,605 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:14,606 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:14,606 INFO L423 AbstractCegarLoop]: === Iteration 36 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:14,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:14,606 INFO L82 PathProgramCache]: Analyzing trace with hash -185533858, now seen corresponding path program 1 times [2018-09-23 19:32:14,606 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:14,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:14,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:14,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:14,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:15,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:15,110 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:15,110 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:15,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:15,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:15,220 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:15,220 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2018-09-23 19:32:15,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:32:15,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:32:15,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:32:15,221 INFO L87 Difference]: Start difference. First operand 951 states and 1643 transitions. Second operand 15 states. [2018-09-23 19:32:17,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:17,661 INFO L93 Difference]: Finished difference Result 2832 states and 4780 transitions. [2018-09-23 19:32:17,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 19:32:17,661 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-23 19:32:17,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:17,668 INFO L225 Difference]: With dead ends: 2832 [2018-09-23 19:32:17,668 INFO L226 Difference]: Without dead ends: 1867 [2018-09-23 19:32:17,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=702, Invalid=3330, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:32:17,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2018-09-23 19:32:18,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1571. [2018-09-23 19:32:18,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1571 states. [2018-09-23 19:32:18,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 2660 transitions. [2018-09-23 19:32:18,044 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 2660 transitions. Word has length 15 [2018-09-23 19:32:18,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:18,044 INFO L480 AbstractCegarLoop]: Abstraction has 1571 states and 2660 transitions. [2018-09-23 19:32:18,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:32:18,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 2660 transitions. [2018-09-23 19:32:18,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:32:18,045 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:18,045 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:18,046 INFO L423 AbstractCegarLoop]: === Iteration 37 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:18,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:18,046 INFO L82 PathProgramCache]: Analyzing trace with hash -497943192, now seen corresponding path program 1 times [2018-09-23 19:32:18,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:18,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:18,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:18,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:18,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:18,137 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:18,137 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:18,137 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 [2018-09-23 19:32:18,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:18,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-23 19:32:18,294 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:18,294 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-23 19:32:18,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:32:18,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:32:18,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:32:18,295 INFO L87 Difference]: Start difference. First operand 1571 states and 2660 transitions. Second operand 15 states. [2018-09-23 19:32:21,787 WARN L178 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2018-09-23 19:32:22,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:22,664 INFO L93 Difference]: Finished difference Result 4461 states and 7467 transitions. [2018-09-23 19:32:22,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 19:32:22,664 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-23 19:32:22,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:22,690 INFO L225 Difference]: With dead ends: 4461 [2018-09-23 19:32:22,693 INFO L226 Difference]: Without dead ends: 2887 [2018-09-23 19:32:22,702 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 [2018-09-23 19:32:22,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2018-09-23 19:32:23,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 2284. [2018-09-23 19:32:23,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2284 states. [2018-09-23 19:32:23,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 3759 transitions. [2018-09-23 19:32:23,706 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 3759 transitions. Word has length 15 [2018-09-23 19:32:23,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:23,706 INFO L480 AbstractCegarLoop]: Abstraction has 2284 states and 3759 transitions. [2018-09-23 19:32:23,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:32:23,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 3759 transitions. [2018-09-23 19:32:23,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:32:23,710 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:23,710 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2018-09-23 19:32:23,710 INFO L423 AbstractCegarLoop]: === Iteration 38 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:23,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:23,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1957708543, now seen corresponding path program 1 times [2018-09-23 19:32:23,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:23,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:23,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:23,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:23,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:23,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:24,660 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:24,660 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:24,661 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:24,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:24,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:24,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:25,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 19:32:25,128 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:25,128 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-23 19:32:25,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:32:25,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:32:25,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:32:25,129 INFO L87 Difference]: Start difference. First operand 2284 states and 3759 transitions. Second operand 16 states. [2018-09-23 19:32:29,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:29,020 INFO L93 Difference]: Finished difference Result 3903 states and 6372 transitions. [2018-09-23 19:32:29,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 19:32:29,021 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-23 19:32:29,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:29,028 INFO L225 Difference]: With dead ends: 3903 [2018-09-23 19:32:29,028 INFO L226 Difference]: Without dead ends: 3227 [2018-09-23 19:32:29,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2797 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1137, Invalid=6873, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 19:32:29,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3227 states. [2018-09-23 19:32:29,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3227 to 2428. [2018-09-23 19:32:29,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2428 states. [2018-09-23 19:32:29,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2428 states to 2428 states and 4065 transitions. [2018-09-23 19:32:29,644 INFO L78 Accepts]: Start accepts. Automaton has 2428 states and 4065 transitions. Word has length 15 [2018-09-23 19:32:29,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:29,645 INFO L480 AbstractCegarLoop]: Abstraction has 2428 states and 4065 transitions. [2018-09-23 19:32:29,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:32:29,645 INFO L276 IsEmpty]: Start isEmpty. Operand 2428 states and 4065 transitions. [2018-09-23 19:32:29,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:32:29,646 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:29,646 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:29,646 INFO L423 AbstractCegarLoop]: === Iteration 39 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:29,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:29,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1386290021, now seen corresponding path program 1 times [2018-09-23 19:32:29,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:29,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:29,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:29,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:29,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:30,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:30,554 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:30,554 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 [2018-09-23 19:32:30,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:30,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:30,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:30,690 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:30,690 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-23 19:32:30,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:32:30,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:32:30,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:32:30,691 INFO L87 Difference]: Start difference. First operand 2428 states and 4065 transitions. Second operand 15 states. [2018-09-23 19:32:33,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:33,525 INFO L93 Difference]: Finished difference Result 5427 states and 9046 transitions. [2018-09-23 19:32:33,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 19:32:33,526 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-23 19:32:33,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:33,530 INFO L225 Difference]: With dead ends: 5427 [2018-09-23 19:32:33,530 INFO L226 Difference]: Without dead ends: 2851 [2018-09-23 19:32:33,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=632, Invalid=2790, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:32:33,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2018-09-23 19:32:34,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2500. [2018-09-23 19:32:34,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2500 states. [2018-09-23 19:32:34,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2500 states to 2500 states and 4177 transitions. [2018-09-23 19:32:34,251 INFO L78 Accepts]: Start accepts. Automaton has 2500 states and 4177 transitions. Word has length 15 [2018-09-23 19:32:34,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:34,251 INFO L480 AbstractCegarLoop]: Abstraction has 2500 states and 4177 transitions. [2018-09-23 19:32:34,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:32:34,251 INFO L276 IsEmpty]: Start isEmpty. Operand 2500 states and 4177 transitions. [2018-09-23 19:32:34,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:32:34,252 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:34,252 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2018-09-23 19:32:34,253 INFO L423 AbstractCegarLoop]: === Iteration 40 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:34,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:34,253 INFO L82 PathProgramCache]: Analyzing trace with hash -38293542, now seen corresponding path program 1 times [2018-09-23 19:32:34,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:34,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:34,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:34,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:34,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:34,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:34,339 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:34,339 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 [2018-09-23 19:32:34,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:34,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:34,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:34,421 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 19:32:34,442 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:34,442 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2018-09-23 19:32:34,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:32:34,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:32:34,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:32:34,443 INFO L87 Difference]: Start difference. First operand 2500 states and 4177 transitions. Second operand 15 states. [2018-09-23 19:32:36,804 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2018-09-23 19:32:37,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:37,384 INFO L93 Difference]: Finished difference Result 5837 states and 9708 transitions. [2018-09-23 19:32:37,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 19:32:37,385 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-23 19:32:37,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:37,391 INFO L225 Difference]: With dead ends: 5837 [2018-09-23 19:32:37,391 INFO L226 Difference]: Without dead ends: 3072 [2018-09-23 19:32:37,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=785, Invalid=3247, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:32:37,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2018-09-23 19:32:38,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 2605. [2018-09-23 19:32:38,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2605 states. [2018-09-23 19:32:38,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2605 states to 2605 states and 4349 transitions. [2018-09-23 19:32:38,076 INFO L78 Accepts]: Start accepts. Automaton has 2605 states and 4349 transitions. Word has length 15 [2018-09-23 19:32:38,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:38,076 INFO L480 AbstractCegarLoop]: Abstraction has 2605 states and 4349 transitions. [2018-09-23 19:32:38,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:32:38,076 INFO L276 IsEmpty]: Start isEmpty. Operand 2605 states and 4349 transitions. [2018-09-23 19:32:38,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:32:38,077 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:38,078 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2018-09-23 19:32:38,078 INFO L423 AbstractCegarLoop]: === Iteration 41 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:38,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:38,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1793898800, now seen corresponding path program 1 times [2018-09-23 19:32:38,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:38,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:38,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:38,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:38,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:38,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:38,216 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 19:32:38,216 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:38,217 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 [2018-09-23 19:32:38,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:38,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:38,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:38,451 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:38,471 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:38,471 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2018-09-23 19:32:38,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 19:32:38,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 19:32:38,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:32:38,472 INFO L87 Difference]: Start difference. First operand 2605 states and 4349 transitions. Second operand 20 states. [2018-09-23 19:32:44,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:44,417 INFO L93 Difference]: Finished difference Result 5120 states and 8519 transitions. [2018-09-23 19:32:44,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-23 19:32:44,417 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 18 [2018-09-23 19:32:44,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:44,422 INFO L225 Difference]: With dead ends: 5120 [2018-09-23 19:32:44,422 INFO L226 Difference]: Without dead ends: 3342 [2018-09-23 19:32:44,428 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 [2018-09-23 19:32:44,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3342 states. [2018-09-23 19:32:45,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3342 to 2886. [2018-09-23 19:32:45,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2886 states. [2018-09-23 19:32:45,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2886 states to 2886 states and 4822 transitions. [2018-09-23 19:32:45,223 INFO L78 Accepts]: Start accepts. Automaton has 2886 states and 4822 transitions. Word has length 18 [2018-09-23 19:32:45,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:45,223 INFO L480 AbstractCegarLoop]: Abstraction has 2886 states and 4822 transitions. [2018-09-23 19:32:45,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 19:32:45,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2886 states and 4822 transitions. [2018-09-23 19:32:45,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:32:45,224 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:45,225 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:45,225 INFO L423 AbstractCegarLoop]: === Iteration 42 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:45,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:45,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1793897518, now seen corresponding path program 1 times [2018-09-23 19:32:45,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:45,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:45,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:45,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:45,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:45,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:45,345 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:45,345 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:45,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:45,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 19:32:45,455 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:45,455 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2018-09-23 19:32:45,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:32:45,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:32:45,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:32:45,456 INFO L87 Difference]: Start difference. First operand 2886 states and 4822 transitions. Second operand 16 states. [2018-09-23 19:32:48,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:48,570 INFO L93 Difference]: Finished difference Result 3487 states and 5852 transitions. [2018-09-23 19:32:48,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 19:32:48,571 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2018-09-23 19:32:48,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:48,576 INFO L225 Difference]: With dead ends: 3487 [2018-09-23 19:32:48,576 INFO L226 Difference]: Without dead ends: 3485 [2018-09-23 19:32:48,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=616, Invalid=3544, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:32:48,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3485 states. [2018-09-23 19:32:49,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3485 to 2999. [2018-09-23 19:32:49,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2999 states. [2018-09-23 19:32:49,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 5026 transitions. [2018-09-23 19:32:49,415 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 5026 transitions. Word has length 18 [2018-09-23 19:32:49,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:49,415 INFO L480 AbstractCegarLoop]: Abstraction has 2999 states and 5026 transitions. [2018-09-23 19:32:49,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:32:49,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 5026 transitions. [2018-09-23 19:32:49,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:32:49,416 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:49,416 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:49,416 INFO L423 AbstractCegarLoop]: === Iteration 43 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:49,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:49,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1785310631, now seen corresponding path program 1 times [2018-09-23 19:32:49,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:49,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:49,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:49,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:49,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:49,513 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:49,514 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:49,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:49,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:49,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:49,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:49,618 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 19:32:49,639 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:49,640 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2018-09-23 19:32:49,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:32:49,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:32:49,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:32:49,640 INFO L87 Difference]: Start difference. First operand 2999 states and 5026 transitions. Second operand 15 states. [2018-09-23 19:32:52,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:52,667 INFO L93 Difference]: Finished difference Result 3557 states and 5973 transitions. [2018-09-23 19:32:52,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 19:32:52,668 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2018-09-23 19:32:52,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:52,671 INFO L225 Difference]: With dead ends: 3557 [2018-09-23 19:32:52,671 INFO L226 Difference]: Without dead ends: 3555 [2018-09-23 19:32:52,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=674, Invalid=3486, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:32:52,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3555 states. [2018-09-23 19:32:53,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3555 to 3102. [2018-09-23 19:32:53,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3102 states. [2018-09-23 19:32:53,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3102 states to 3102 states and 5194 transitions. [2018-09-23 19:32:53,358 INFO L78 Accepts]: Start accepts. Automaton has 3102 states and 5194 transitions. Word has length 18 [2018-09-23 19:32:53,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:53,359 INFO L480 AbstractCegarLoop]: Abstraction has 3102 states and 5194 transitions. [2018-09-23 19:32:53,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:32:53,359 INFO L276 IsEmpty]: Start isEmpty. Operand 3102 states and 5194 transitions. [2018-09-23 19:32:53,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:32:53,360 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:53,360 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:53,360 INFO L423 AbstractCegarLoop]: === Iteration 44 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:53,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:53,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1256757274, now seen corresponding path program 2 times [2018-09-23 19:32:53,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:53,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:53,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:53,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:53,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:53,470 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:53,470 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:53,480 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:32:53,487 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:32:53,487 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:53,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:53,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:53,625 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:53,625 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2018-09-23 19:32:53,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:32:53,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:32:53,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:32:53,626 INFO L87 Difference]: Start difference. First operand 3102 states and 5194 transitions. Second operand 18 states. [2018-09-23 19:33:01,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:01,773 INFO L93 Difference]: Finished difference Result 5252 states and 8823 transitions. [2018-09-23 19:33:01,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-23 19:33:01,773 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-23 19:33:01,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:01,777 INFO L225 Difference]: With dead ends: 5252 [2018-09-23 19:33:01,777 INFO L226 Difference]: Without dead ends: 5250 [2018-09-23 19:33:01,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7869 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2825, Invalid=16915, Unknown=0, NotChecked=0, Total=19740 [2018-09-23 19:33:01,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5250 states. [2018-09-23 19:33:02,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5250 to 3515. [2018-09-23 19:33:02,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3515 states. [2018-09-23 19:33:02,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3515 states to 3515 states and 5926 transitions. [2018-09-23 19:33:02,522 INFO L78 Accepts]: Start accepts. Automaton has 3515 states and 5926 transitions. Word has length 18 [2018-09-23 19:33:02,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:02,523 INFO L480 AbstractCegarLoop]: Abstraction has 3515 states and 5926 transitions. [2018-09-23 19:33:02,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:33:02,523 INFO L276 IsEmpty]: Start isEmpty. Operand 3515 states and 5926 transitions. [2018-09-23 19:33:02,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:33:02,524 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:02,524 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-23 19:33:02,524 INFO L423 AbstractCegarLoop]: === Iteration 45 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:02,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:02,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1248170387, now seen corresponding path program 2 times [2018-09-23 19:33:02,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:02,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:02,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:02,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:02,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:02,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:02,667 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:02,667 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:02,667 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:33:02,675 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:33:02,683 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:33:02,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:02,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:02,826 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:02,846 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:02,847 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-09-23 19:33:02,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:33:02,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:33:02,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:33:02,847 INFO L87 Difference]: Start difference. First operand 3515 states and 5926 transitions. Second operand 18 states. [2018-09-23 19:33:10,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:10,607 INFO L93 Difference]: Finished difference Result 4843 states and 8107 transitions. [2018-09-23 19:33:10,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-09-23 19:33:10,607 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-23 19:33:10,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:10,612 INFO L225 Difference]: With dead ends: 4843 [2018-09-23 19:33:10,612 INFO L226 Difference]: Without dead ends: 4841 [2018-09-23 19:33:10,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6131 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2645, Invalid=12855, Unknown=0, NotChecked=0, Total=15500 [2018-09-23 19:33:10,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4841 states. [2018-09-23 19:33:11,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4841 to 3405. [2018-09-23 19:33:11,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3405 states. [2018-09-23 19:33:11,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3405 states to 3405 states and 5721 transitions. [2018-09-23 19:33:11,418 INFO L78 Accepts]: Start accepts. Automaton has 3405 states and 5721 transitions. Word has length 18 [2018-09-23 19:33:11,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:11,418 INFO L480 AbstractCegarLoop]: Abstraction has 3405 states and 5721 transitions. [2018-09-23 19:33:11,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:33:11,418 INFO L276 IsEmpty]: Start isEmpty. Operand 3405 states and 5721 transitions. [2018-09-23 19:33:11,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:33:11,419 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:11,419 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-23 19:33:11,420 INFO L423 AbstractCegarLoop]: === Iteration 46 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:11,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:11,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1231339551, now seen corresponding path program 2 times [2018-09-23 19:33:11,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:11,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:11,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:11,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:11,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:11,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:11,572 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:11,573 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 [2018-09-23 19:33:11,581 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:33:11,588 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:33:11,589 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:11,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:11,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-23 19:33:11,669 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:11,670 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 16 [2018-09-23 19:33:11,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:33:11,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:33:11,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:33:11,670 INFO L87 Difference]: Start difference. First operand 3405 states and 5721 transitions. Second operand 16 states. [2018-09-23 19:33:14,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:14,489 INFO L93 Difference]: Finished difference Result 5774 states and 9598 transitions. [2018-09-23 19:33:14,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 19:33:14,490 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2018-09-23 19:33:14,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:14,493 INFO L225 Difference]: With dead ends: 5774 [2018-09-23 19:33:14,494 INFO L226 Difference]: Without dead ends: 3100 [2018-09-23 19:33:14,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=695, Invalid=2385, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:33:14,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2018-09-23 19:33:15,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 2583. [2018-09-23 19:33:15,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2583 states. [2018-09-23 19:33:15,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2583 states to 2583 states and 4270 transitions. [2018-09-23 19:33:15,106 INFO L78 Accepts]: Start accepts. Automaton has 2583 states and 4270 transitions. Word has length 18 [2018-09-23 19:33:15,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:15,106 INFO L480 AbstractCegarLoop]: Abstraction has 2583 states and 4270 transitions. [2018-09-23 19:33:15,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:33:15,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2583 states and 4270 transitions. [2018-09-23 19:33:15,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:33:15,107 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:15,107 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:33:15,108 INFO L423 AbstractCegarLoop]: === Iteration 47 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:15,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:15,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1890837259, now seen corresponding path program 1 times [2018-09-23 19:33:15,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:15,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:15,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:15,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:15,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:15,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:15,246 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:15,246 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 [2018-09-23 19:33:15,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:15,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:15,326 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 19:33:15,347 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:15,347 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2018-09-23 19:33:15,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:33:15,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:33:15,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:33:15,348 INFO L87 Difference]: Start difference. First operand 2583 states and 4270 transitions. Second operand 15 states. [2018-09-23 19:33:17,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:17,844 INFO L93 Difference]: Finished difference Result 3114 states and 5123 transitions. [2018-09-23 19:33:17,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 19:33:17,845 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2018-09-23 19:33:17,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:17,848 INFO L225 Difference]: With dead ends: 3114 [2018-09-23 19:33:17,848 INFO L226 Difference]: Without dead ends: 3112 [2018-09-23 19:33:17,849 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 [2018-09-23 19:33:17,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3112 states. [2018-09-23 19:33:18,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3112 to 2773. [2018-09-23 19:33:18,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2773 states. [2018-09-23 19:33:18,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2773 states to 2773 states and 4589 transitions. [2018-09-23 19:33:18,622 INFO L78 Accepts]: Start accepts. Automaton has 2773 states and 4589 transitions. Word has length 18 [2018-09-23 19:33:18,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:18,622 INFO L480 AbstractCegarLoop]: Abstraction has 2773 states and 4589 transitions. [2018-09-23 19:33:18,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:33:18,622 INFO L276 IsEmpty]: Start isEmpty. Operand 2773 states and 4589 transitions. [2018-09-23 19:33:18,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:33:18,623 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:18,624 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-23 19:33:18,624 INFO L423 AbstractCegarLoop]: === Iteration 48 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:18,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:18,624 INFO L82 PathProgramCache]: Analyzing trace with hash 740718717, now seen corresponding path program 2 times [2018-09-23 19:33:18,624 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:18,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:18,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:18,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:18,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:18,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:18,732 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:18,732 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:18,732 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 [2018-09-23 19:33:18,740 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:33:18,747 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:33:18,748 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:18,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:18,837 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:18,858 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:18,858 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2018-09-23 19:33:18,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:33:18,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:33:18,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:33:18,859 INFO L87 Difference]: Start difference. First operand 2773 states and 4589 transitions. Second operand 17 states. [2018-09-23 19:33:24,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:24,123 INFO L93 Difference]: Finished difference Result 4415 states and 7404 transitions. [2018-09-23 19:33:24,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-23 19:33:24,123 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2018-09-23 19:33:24,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:24,128 INFO L225 Difference]: With dead ends: 4415 [2018-09-23 19:33:24,128 INFO L226 Difference]: Without dead ends: 4413 [2018-09-23 19:33:24,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3051 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1803, Invalid=6939, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 19:33:24,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4413 states. [2018-09-23 19:33:24,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4413 to 3073. [2018-09-23 19:33:24,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3073 states. [2018-09-23 19:33:24,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3073 states to 3073 states and 5108 transitions. [2018-09-23 19:33:24,958 INFO L78 Accepts]: Start accepts. Automaton has 3073 states and 5108 transitions. Word has length 18 [2018-09-23 19:33:24,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:24,958 INFO L480 AbstractCegarLoop]: Abstraction has 3073 states and 5108 transitions. [2018-09-23 19:33:24,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:33:24,958 INFO L276 IsEmpty]: Start isEmpty. Operand 3073 states and 5108 transitions. [2018-09-23 19:33:24,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:33:24,959 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:24,959 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:33:24,960 INFO L423 AbstractCegarLoop]: === Iteration 49 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:24,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:24,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1434281659, now seen corresponding path program 1 times [2018-09-23 19:33:24,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:24,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:24,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:24,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:24,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:25,179 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:25,179 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:25,179 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 [2018-09-23 19:33:25,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:25,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:25,277 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:25,297 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:25,298 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2018-09-23 19:33:25,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:33:25,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:33:25,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:33:25,298 INFO L87 Difference]: Start difference. First operand 3073 states and 5108 transitions. Second operand 16 states. [2018-09-23 19:33:29,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:29,386 INFO L93 Difference]: Finished difference Result 4429 states and 7411 transitions. [2018-09-23 19:33:29,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 19:33:29,386 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2018-09-23 19:33:29,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:29,390 INFO L225 Difference]: With dead ends: 4429 [2018-09-23 19:33:29,390 INFO L226 Difference]: Without dead ends: 4427 [2018-09-23 19:33:29,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:33:29,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4427 states. [2018-09-23 19:33:30,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4427 to 2723. [2018-09-23 19:33:30,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2723 states. [2018-09-23 19:33:30,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2723 states to 2723 states and 4478 transitions. [2018-09-23 19:33:30,172 INFO L78 Accepts]: Start accepts. Automaton has 2723 states and 4478 transitions. Word has length 18 [2018-09-23 19:33:30,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:30,173 INFO L480 AbstractCegarLoop]: Abstraction has 2723 states and 4478 transitions. [2018-09-23 19:33:30,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:33:30,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2723 states and 4478 transitions. [2018-09-23 19:33:30,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:33:30,174 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:30,174 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:33:30,174 INFO L423 AbstractCegarLoop]: === Iteration 50 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:30,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:30,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1483012849, now seen corresponding path program 1 times [2018-09-23 19:33:30,174 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:30,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:30,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:30,175 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:30,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:30,274 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:30,275 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 [2018-09-23 19:33:30,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:30,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:30,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:30,452 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:30,452 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2018-09-23 19:33:30,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:33:30,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:33:30,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:33:30,453 INFO L87 Difference]: Start difference. First operand 2723 states and 4478 transitions. Second operand 18 states. [2018-09-23 19:33:35,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:35,066 INFO L93 Difference]: Finished difference Result 4290 states and 7151 transitions. [2018-09-23 19:33:35,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 19:33:35,067 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-23 19:33:35,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:35,071 INFO L225 Difference]: With dead ends: 4290 [2018-09-23 19:33:35,071 INFO L226 Difference]: Without dead ends: 4288 [2018-09-23 19:33:35,073 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 [2018-09-23 19:33:35,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4288 states. [2018-09-23 19:33:36,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4288 to 3364. [2018-09-23 19:33:36,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3364 states. [2018-09-23 19:33:36,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3364 states to 3364 states and 5610 transitions. [2018-09-23 19:33:36,050 INFO L78 Accepts]: Start accepts. Automaton has 3364 states and 5610 transitions. Word has length 18 [2018-09-23 19:33:36,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:36,050 INFO L480 AbstractCegarLoop]: Abstraction has 3364 states and 5610 transitions. [2018-09-23 19:33:36,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:33:36,050 INFO L276 IsEmpty]: Start isEmpty. Operand 3364 states and 5610 transitions. [2018-09-23 19:33:36,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:33:36,051 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:36,051 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-23 19:33:36,051 INFO L423 AbstractCegarLoop]: === Iteration 51 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:36,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:36,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1851213523, now seen corresponding path program 3 times [2018-09-23 19:33:36,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:36,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:36,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:36,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:36,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:36,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:36,141 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:36,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:36,142 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:33:36,151 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:33:36,157 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-23 19:33:36,158 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:36,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 19:33:36,368 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:36,368 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2018-09-23 19:33:36,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:33:36,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:33:36,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:33:36,369 INFO L87 Difference]: Start difference. First operand 3364 states and 5610 transitions. Second operand 18 states. [2018-09-23 19:33:41,883 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2018-09-23 19:33:44,933 WARN L178 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2018-09-23 19:33:47,712 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2018-09-23 19:33:48,160 WARN L178 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2018-09-23 19:33:48,734 WARN L178 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2018-09-23 19:33:49,221 WARN L178 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2018-09-23 19:33:50,634 WARN L178 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2018-09-23 19:33:51,338 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2018-09-23 19:33:52,026 WARN L178 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2018-09-23 19:33:52,746 WARN L178 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2018-09-23 19:33:53,355 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2018-09-23 19:33:59,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:59,172 INFO L93 Difference]: Finished difference Result 9624 states and 16323 transitions. [2018-09-23 19:33:59,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2018-09-23 19:33:59,173 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-23 19:33:59,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:59,181 INFO L225 Difference]: With dead ends: 9624 [2018-09-23 19:33:59,182 INFO L226 Difference]: Without dead ends: 9622 [2018-09-23 19:33:59,184 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 [2018-09-23 19:33:59,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9622 states. [2018-09-23 19:34:00,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9622 to 3326. [2018-09-23 19:34:00,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3326 states. [2018-09-23 19:34:00,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3326 states to 3326 states and 5536 transitions. [2018-09-23 19:34:00,232 INFO L78 Accepts]: Start accepts. Automaton has 3326 states and 5536 transitions. Word has length 18 [2018-09-23 19:34:00,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:00,232 INFO L480 AbstractCegarLoop]: Abstraction has 3326 states and 5536 transitions. [2018-09-23 19:34:00,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:34:00,232 INFO L276 IsEmpty]: Start isEmpty. Operand 3326 states and 5536 transitions. [2018-09-23 19:34:00,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:34:00,234 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:00,234 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:34:00,234 INFO L423 AbstractCegarLoop]: === Iteration 52 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:00,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:00,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1899944713, now seen corresponding path program 1 times [2018-09-23 19:34:00,235 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:00,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:00,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:00,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:00,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:00,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:00,783 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:00,784 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:00,784 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 [2018-09-23 19:34:00,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:00,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:00,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:00,882 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 19:34:00,902 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:00,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2018-09-23 19:34:00,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:34:00,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:34:00,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:34:00,903 INFO L87 Difference]: Start difference. First operand 3326 states and 5536 transitions. Second operand 17 states. [2018-09-23 19:34:06,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:06,637 INFO L93 Difference]: Finished difference Result 5572 states and 9460 transitions. [2018-09-23 19:34:06,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-23 19:34:06,638 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2018-09-23 19:34:06,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:06,643 INFO L225 Difference]: With dead ends: 5572 [2018-09-23 19:34:06,643 INFO L226 Difference]: Without dead ends: 5570 [2018-09-23 19:34:06,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2783 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1511, Invalid=7045, Unknown=0, NotChecked=0, Total=8556 [2018-09-23 19:34:06,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5570 states. [2018-09-23 19:34:07,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5570 to 3526. [2018-09-23 19:34:07,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3526 states. [2018-09-23 19:34:07,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3526 states to 3526 states and 5899 transitions. [2018-09-23 19:34:07,907 INFO L78 Accepts]: Start accepts. Automaton has 3526 states and 5899 transitions. Word has length 18 [2018-09-23 19:34:07,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:07,907 INFO L480 AbstractCegarLoop]: Abstraction has 3526 states and 5899 transitions. [2018-09-23 19:34:07,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:34:07,907 INFO L276 IsEmpty]: Start isEmpty. Operand 3526 states and 5899 transitions. [2018-09-23 19:34:07,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:34:07,908 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:07,908 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:34:07,908 INFO L423 AbstractCegarLoop]: === Iteration 53 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:07,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:07,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1150743797, now seen corresponding path program 2 times [2018-09-23 19:34:07,909 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:07,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:07,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:07,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:07,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:07,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:08,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:08,010 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:08,010 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 [2018-09-23 19:34:08,018 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:34:08,025 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:34:08,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:08,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:08,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 19:34:08,136 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:08,136 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2018-09-23 19:34:08,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:34:08,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:34:08,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:34:08,137 INFO L87 Difference]: Start difference. First operand 3526 states and 5899 transitions. Second operand 17 states. [2018-09-23 19:34:12,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:12,558 INFO L93 Difference]: Finished difference Result 4458 states and 7480 transitions. [2018-09-23 19:34:12,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 19:34:12,558 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2018-09-23 19:34:12,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:12,563 INFO L225 Difference]: With dead ends: 4458 [2018-09-23 19:34:12,563 INFO L226 Difference]: Without dead ends: 4456 [2018-09-23 19:34:12,564 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 [2018-09-23 19:34:12,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4456 states. [2018-09-23 19:34:14,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4456 to 3633. [2018-09-23 19:34:14,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3633 states. [2018-09-23 19:34:14,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3633 states to 3633 states and 6081 transitions. [2018-09-23 19:34:14,044 INFO L78 Accepts]: Start accepts. Automaton has 3633 states and 6081 transitions. Word has length 18 [2018-09-23 19:34:14,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:14,044 INFO L480 AbstractCegarLoop]: Abstraction has 3633 states and 6081 transitions. [2018-09-23 19:34:14,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:34:14,045 INFO L276 IsEmpty]: Start isEmpty. Operand 3633 states and 6081 transitions. [2018-09-23 19:34:14,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:34:14,046 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:14,046 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:34:14,046 INFO L423 AbstractCegarLoop]: === Iteration 54 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:14,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:14,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1665373557, now seen corresponding path program 1 times [2018-09-23 19:34:14,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:14,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:14,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:14,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:14,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:14,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:14,340 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:14,340 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:14,341 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 [2018-09-23 19:34:14,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:14,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 19:34:14,915 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:14,915 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2018-09-23 19:34:14,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 19:34:14,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 19:34:14,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:34:14,916 INFO L87 Difference]: Start difference. First operand 3633 states and 6081 transitions. Second operand 21 states. [2018-09-23 19:34:15,374 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-09-23 19:34:19,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:19,319 INFO L93 Difference]: Finished difference Result 4389 states and 7355 transitions. [2018-09-23 19:34:19,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 19:34:19,319 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 19 [2018-09-23 19:34:19,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:19,323 INFO L225 Difference]: With dead ends: 4389 [2018-09-23 19:34:19,324 INFO L226 Difference]: Without dead ends: 4376 [2018-09-23 19:34:19,325 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 [2018-09-23 19:34:19,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4376 states. [2018-09-23 19:34:20,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4376 to 4152. [2018-09-23 19:34:20,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4152 states. [2018-09-23 19:34:20,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4152 states to 4152 states and 6931 transitions. [2018-09-23 19:34:20,915 INFO L78 Accepts]: Start accepts. Automaton has 4152 states and 6931 transitions. Word has length 19 [2018-09-23 19:34:20,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:20,916 INFO L480 AbstractCegarLoop]: Abstraction has 4152 states and 6931 transitions. [2018-09-23 19:34:20,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 19:34:20,916 INFO L276 IsEmpty]: Start isEmpty. Operand 4152 states and 6931 transitions. [2018-09-23 19:34:20,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:34:20,917 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:20,917 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-23 19:34:20,918 INFO L423 AbstractCegarLoop]: === Iteration 55 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:20,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:20,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1271169050, now seen corresponding path program 1 times [2018-09-23 19:34:20,918 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:20,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:20,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:20,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:20,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:20,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:21,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:21,061 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:21,061 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:34:21,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:21,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:21,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:21,220 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:21,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2018-09-23 19:34:21,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 19:34:21,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 19:34:21,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:34:21,221 INFO L87 Difference]: Start difference. First operand 4152 states and 6931 transitions. Second operand 19 states. [2018-09-23 19:34:28,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:28,781 INFO L93 Difference]: Finished difference Result 7602 states and 12857 transitions. [2018-09-23 19:34:28,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 19:34:28,782 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-23 19:34:28,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:28,790 INFO L225 Difference]: With dead ends: 7602 [2018-09-23 19:34:28,790 INFO L226 Difference]: Without dead ends: 7553 [2018-09-23 19:34:28,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1106, Invalid=4006, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:34:28,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7553 states. [2018-09-23 19:34:31,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7553 to 5765. [2018-09-23 19:34:31,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5765 states. [2018-09-23 19:34:31,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5765 states to 5765 states and 9725 transitions. [2018-09-23 19:34:31,162 INFO L78 Accepts]: Start accepts. Automaton has 5765 states and 9725 transitions. Word has length 19 [2018-09-23 19:34:31,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:31,162 INFO L480 AbstractCegarLoop]: Abstraction has 5765 states and 9725 transitions. [2018-09-23 19:34:31,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 19:34:31,163 INFO L276 IsEmpty]: Start isEmpty. Operand 5765 states and 9725 transitions. [2018-09-23 19:34:31,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:34:31,164 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:31,164 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:34:31,164 INFO L423 AbstractCegarLoop]: === Iteration 56 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:31,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:31,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1231183154, now seen corresponding path program 1 times [2018-09-23 19:34:31,165 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:31,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:31,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:31,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:31,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:31,296 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:31,296 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 [2018-09-23 19:34:31,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:31,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:31,413 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 19:34:31,435 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:31,436 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2018-09-23 19:34:31,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:34:31,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:34:31,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:34:31,437 INFO L87 Difference]: Start difference. First operand 5765 states and 9725 transitions. Second operand 18 states. [2018-09-23 19:34:42,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:42,697 INFO L93 Difference]: Finished difference Result 10730 states and 18220 transitions. [2018-09-23 19:34:42,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-23 19:34:42,697 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2018-09-23 19:34:42,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:42,706 INFO L225 Difference]: With dead ends: 10730 [2018-09-23 19:34:42,706 INFO L226 Difference]: Without dead ends: 10673 [2018-09-23 19:34:42,708 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 [2018-09-23 19:34:42,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10673 states. [2018-09-23 19:34:45,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10673 to 5867. [2018-09-23 19:34:45,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5867 states. [2018-09-23 19:34:45,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5867 states to 5867 states and 9873 transitions. [2018-09-23 19:34:45,479 INFO L78 Accepts]: Start accepts. Automaton has 5867 states and 9873 transitions. Word has length 19 [2018-09-23 19:34:45,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:45,479 INFO L480 AbstractCegarLoop]: Abstraction has 5867 states and 9873 transitions. [2018-09-23 19:34:45,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:34:45,480 INFO L276 IsEmpty]: Start isEmpty. Operand 5867 states and 9873 transitions. [2018-09-23 19:34:45,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 19:34:45,481 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:45,481 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2018-09-23 19:34:45,481 INFO L423 AbstractCegarLoop]: === Iteration 57 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:45,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:45,482 INFO L82 PathProgramCache]: Analyzing trace with hash -298147634, now seen corresponding path program 2 times [2018-09-23 19:34:45,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:45,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:45,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:45,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:45,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 19:34:45,598 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:45,598 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 [2018-09-23 19:34:45,607 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:34:45,615 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:34:45,615 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:45,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:45,738 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-23 19:34:45,758 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:45,758 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2018-09-23 19:34:45,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 19:34:45,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 19:34:45,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:34:45,759 INFO L87 Difference]: Start difference. First operand 5867 states and 9873 transitions. Second operand 20 states. [2018-09-23 19:34:50,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:50,961 INFO L93 Difference]: Finished difference Result 12951 states and 21640 transitions. [2018-09-23 19:34:50,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 19:34:50,962 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 21 [2018-09-23 19:34:50,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:50,969 INFO L225 Difference]: With dead ends: 12951 [2018-09-23 19:34:50,969 INFO L226 Difference]: Without dead ends: 7453 [2018-09-23 19:34:50,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=369, Invalid=1983, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:34:50,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7453 states. [2018-09-23 19:34:54,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7453 to 6977. [2018-09-23 19:34:54,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6977 states. [2018-09-23 19:34:54,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6977 states to 6977 states and 11514 transitions. [2018-09-23 19:34:54,026 INFO L78 Accepts]: Start accepts. Automaton has 6977 states and 11514 transitions. Word has length 21 [2018-09-23 19:34:54,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:54,027 INFO L480 AbstractCegarLoop]: Abstraction has 6977 states and 11514 transitions. [2018-09-23 19:34:54,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 19:34:54,027 INFO L276 IsEmpty]: Start isEmpty. Operand 6977 states and 11514 transitions. [2018-09-23 19:34:54,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 19:34:54,029 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:54,029 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:34:54,030 INFO L423 AbstractCegarLoop]: === Iteration 58 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:54,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:54,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1920603351, now seen corresponding path program 1 times [2018-09-23 19:34:54,030 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:54,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:54,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:54,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:54,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:54,168 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:54,168 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:54,168 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 [2018-09-23 19:34:54,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:54,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:54,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 19:34:54,278 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:54,278 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2018-09-23 19:34:54,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:34:54,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:34:54,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:34:54,279 INFO L87 Difference]: Start difference. First operand 6977 states and 11514 transitions. Second operand 17 states. [2018-09-23 19:34:59,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:59,794 INFO L93 Difference]: Finished difference Result 7309 states and 12055 transitions. [2018-09-23 19:34:59,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 19:34:59,794 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2018-09-23 19:34:59,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:59,802 INFO L225 Difference]: With dead ends: 7309 [2018-09-23 19:34:59,802 INFO L226 Difference]: Without dead ends: 7307 [2018-09-23 19:34:59,804 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 [2018-09-23 19:34:59,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7307 states. [2018-09-23 19:35:03,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7307 to 6935. [2018-09-23 19:35:03,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6935 states. [2018-09-23 19:35:03,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6935 states to 6935 states and 11445 transitions. [2018-09-23 19:35:03,025 INFO L78 Accepts]: Start accepts. Automaton has 6935 states and 11445 transitions. Word has length 21 [2018-09-23 19:35:03,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:03,025 INFO L480 AbstractCegarLoop]: Abstraction has 6935 states and 11445 transitions. [2018-09-23 19:35:03,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:35:03,025 INFO L276 IsEmpty]: Start isEmpty. Operand 6935 states and 11445 transitions. [2018-09-23 19:35:03,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 19:35:03,027 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:03,027 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:35:03,027 INFO L423 AbstractCegarLoop]: === Iteration 59 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:03,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:03,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1010297104, now seen corresponding path program 1 times [2018-09-23 19:35:03,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:03,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:03,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:03,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:03,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 19:35:03,151 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:03,152 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:35:03,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:03,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:04,346 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-23 19:35:04,366 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:04,366 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2018-09-23 19:35:04,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 19:35:04,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 19:35:04,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:35:04,367 INFO L87 Difference]: Start difference. First operand 6935 states and 11445 transitions. Second operand 21 states. [2018-09-23 19:35:10,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:10,858 INFO L93 Difference]: Finished difference Result 11330 states and 18599 transitions. [2018-09-23 19:35:10,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 19:35:10,859 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-23 19:35:10,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:10,866 INFO L225 Difference]: With dead ends: 11330 [2018-09-23 19:35:10,866 INFO L226 Difference]: Without dead ends: 7599 [2018-09-23 19:35:10,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=590, Invalid=3442, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:35:10,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7599 states. [2018-09-23 19:35:13,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7599 to 6837. [2018-09-23 19:35:13,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6837 states. [2018-09-23 19:35:13,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6837 states to 6837 states and 11276 transitions. [2018-09-23 19:35:13,878 INFO L78 Accepts]: Start accepts. Automaton has 6837 states and 11276 transitions. Word has length 21 [2018-09-23 19:35:13,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:13,879 INFO L480 AbstractCegarLoop]: Abstraction has 6837 states and 11276 transitions. [2018-09-23 19:35:13,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 19:35:13,879 INFO L276 IsEmpty]: Start isEmpty. Operand 6837 states and 11276 transitions. [2018-09-23 19:35:13,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 19:35:13,881 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:13,881 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:35:13,881 INFO L423 AbstractCegarLoop]: === Iteration 60 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:13,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:13,881 INFO L82 PathProgramCache]: Analyzing trace with hash -972124902, now seen corresponding path program 1 times [2018-09-23 19:35:13,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:13,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:13,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:13,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:13,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:14,017 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:14,018 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:14,018 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 [2018-09-23 19:35:14,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:14,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:14,118 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 19:35:14,139 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:14,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 14 [2018-09-23 19:35:14,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:35:14,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:35:14,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:35:14,140 INFO L87 Difference]: Start difference. First operand 6837 states and 11276 transitions. Second operand 15 states. [2018-09-23 19:35:18,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:18,962 INFO L93 Difference]: Finished difference Result 7136 states and 11762 transitions. [2018-09-23 19:35:18,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 19:35:18,963 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2018-09-23 19:35:18,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:18,969 INFO L225 Difference]: With dead ends: 7136 [2018-09-23 19:35:18,969 INFO L226 Difference]: Without dead ends: 7134 [2018-09-23 19:35:18,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:35:18,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7134 states. [2018-09-23 19:35:22,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7134 to 6814. [2018-09-23 19:35:22,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6814 states. [2018-09-23 19:35:22,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6814 states to 6814 states and 11236 transitions. [2018-09-23 19:35:22,103 INFO L78 Accepts]: Start accepts. Automaton has 6814 states and 11236 transitions. Word has length 21 [2018-09-23 19:35:22,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:22,103 INFO L480 AbstractCegarLoop]: Abstraction has 6814 states and 11236 transitions. [2018-09-23 19:35:22,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:35:22,103 INFO L276 IsEmpty]: Start isEmpty. Operand 6814 states and 11236 transitions. [2018-09-23 19:35:22,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 19:35:22,105 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:22,105 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2018-09-23 19:35:22,105 INFO L423 AbstractCegarLoop]: === Iteration 61 === [productErr3ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:22,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:22,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1513598179, now seen corresponding path program 4 times [2018-09-23 19:35:22,105 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:22,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:22,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:22,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:22,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:22,257 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:22,258 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:22,258 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 [2018-09-23 19:35:22,266 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:35:22,273 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:35:22,273 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:22,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 19:35:22,444 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:22,444 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2018-09-23 19:35:22,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 19:35:22,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 19:35:22,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:35:22,445 INFO L87 Difference]: Start difference. First operand 6814 states and 11236 transitions. Second operand 20 states. [2018-09-23 19:35:35,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:35,321 INFO L93 Difference]: Finished difference Result 19394 states and 31307 transitions. [2018-09-23 19:35:35,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-09-23 19:35:35,322 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 21 [2018-09-23 19:35:35,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:35,331 INFO L225 Difference]: With dead ends: 19394 [2018-09-23 19:35:35,331 INFO L226 Difference]: Without dead ends: 12053 [2018-09-23 19:35:35,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6952 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2115, Invalid=16245, Unknown=0, NotChecked=0, Total=18360 [2018-09-23 19:35:35,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12053 states. Received shutdown request... [2018-09-23 19:35:39,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12053 to 9291. [2018-09-23 19:35:39,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9291 states. [2018-09-23 19:35:39,809 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 19:35:39,814 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 19:35:39,814 INFO L202 PluginConnector]: Adding new model threadpooling_product_WithoutIf.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 07:35:39 BoogieIcfgContainer [2018-09-23 19:35:39,814 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 19:35:39,815 INFO L168 Benchmark]: Toolchain (without parser) took 252875.19 ms. Allocated memory was 1.6 GB in the beginning and 3.5 GB in the end (delta: 1.9 GB). Free memory was 1.5 GB in the beginning and 3.3 GB in the end (delta: -1.8 GB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-09-23 19:35:39,816 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:35:39,816 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.43 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:35:39,817 INFO L168 Benchmark]: Boogie Preprocessor took 19.76 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:35:39,817 INFO L168 Benchmark]: RCFGBuilder took 454.00 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-23 19:35:39,818 INFO L168 Benchmark]: TraceAbstraction took 252352.40 ms. Allocated memory was 1.6 GB in the beginning and 3.5 GB in the end (delta: 1.9 GB). Free memory was 1.5 GB in the beginning and 3.3 GB in the end (delta: -1.8 GB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-09-23 19:35:39,820 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 0.21 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.43 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 19.76 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 454.00 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 252352.40 ms. Allocated memory was 1.6 GB in the beginning and 3.5 GB in the end (delta: 1.9 GB). Free memory was 1.5 GB in the beginning and 3.3 GB in the end (delta: -1.8 GB). Peak memory consumption was 2.5 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: 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). - 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). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 4 error locations. TIMEOUT Result, 252.2s OverallTime, 61 OverallIterations, 4 TraceHistogramMax, 188.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2153 SDtfs, 10752 SDslu, 7123 SDs, 0 SdLazy, 56865 SolverSat, 7360 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 55.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3335 GetRequests, 511 SyntacticMatches, 21 SemanticMatches, 2803 ConstructedPredicates, 0 IntricatePredicates, 8 DeprecatedPredicates, 75716 ImplicationChecksByTransitivity, 80.0s 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: 41.8s AutomataMinimizationTime, 61 MinimizatonAttempts, 33087 StatesRemovedByMinimization, 60 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 18.9s 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-0-2018-09-23_19-35-39-830.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-0-2018-09-23_19-35-39-830.csv Completed graceful shutdown