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_WithProcedures.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b2fde6a [2018-09-28 09:56:02,698 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-28 09:56:02,700 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-28 09:56:02,716 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-28 09:56:02,716 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-28 09:56:02,718 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-28 09:56:02,719 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-28 09:56:02,721 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-28 09:56:02,723 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-28 09:56:02,724 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-28 09:56:02,725 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-28 09:56:02,725 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-28 09:56:02,726 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-28 09:56:02,727 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-28 09:56:02,728 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-28 09:56:02,730 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-28 09:56:02,731 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-28 09:56:02,732 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-28 09:56:02,734 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-28 09:56:02,736 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-28 09:56:02,737 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-28 09:56:02,738 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-28 09:56:02,741 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-28 09:56:02,749 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-28 09:56:02,772 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-28 09:56:02,772 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-28 09:56:02,776 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-28 09:56:02,776 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-28 09:56:02,777 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-28 09:56:02,777 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-28 09:56:02,777 INFO L133 SettingsManager]: * Use SBE=true [2018-09-28 09:56:02,778 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-28 09:56:02,779 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-28 09:56:02,779 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-28 09:56:02,779 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-28 09:56:02,779 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-28 09:56:02,779 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-28 09:56:02,779 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-28 09:56:02,780 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-28 09:56:02,780 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-28 09:56:02,780 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-28 09:56:02,780 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-28 09:56:02,780 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-28 09:56:02,781 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-28 09:56:02,781 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-28 09:56:02,781 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-28 09:56:02,781 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 09:56:02,783 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-28 09:56:02,783 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-28 09:56:02,783 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-28 09:56:02,783 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-28 09:56:02,783 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-28 09:56:02,784 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-28 09:56:02,784 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-28 09:56:02,840 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-28 09:56:02,853 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-28 09:56:02,857 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-28 09:56:02,858 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-28 09:56:02,859 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-28 09:56:02,860 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/threadpooling_product_WithProcedures.bpl [2018-09-28 09:56:02,860 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/threadpooling_product_WithProcedures.bpl' [2018-09-28 09:56:02,914 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-28 09:56:02,917 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-28 09:56:02,918 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-28 09:56:02,918 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-28 09:56:02,919 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-28 09:56:02,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:56:02" (1/1) ... [2018-09-28 09:56:02,957 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:56:02" (1/1) ... [2018-09-28 09:56:02,968 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-28 09:56:02,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-28 09:56:02,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-28 09:56:02,969 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-28 09:56:02,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:56:02" (1/1) ... [2018-09-28 09:56:02,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:56:02" (1/1) ... [2018-09-28 09:56:02,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:56:02" (1/1) ... [2018-09-28 09:56:02,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:56:02" (1/1) ... [2018-09-28 09:56:02,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:56:02" (1/1) ... [2018-09-28 09:56:03,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:56:02" (1/1) ... [2018-09-28 09:56:03,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:56:02" (1/1) ... [2018-09-28 09:56:03,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-28 09:56:03,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-28 09:56:03,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-28 09:56:03,006 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-28 09:56:03,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:56:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 09:56:03,096 INFO L130 BoogieDeclarations]: Found specification of procedure l1l0 [2018-09-28 09:56:03,096 INFO L138 BoogieDeclarations]: Found implementation of procedure l1l0 [2018-09-28 09:56:03,096 INFO L130 BoogieDeclarations]: Found specification of procedure l0l1 [2018-09-28 09:56:03,097 INFO L138 BoogieDeclarations]: Found implementation of procedure l0l1 [2018-09-28 09:56:03,097 INFO L130 BoogieDeclarations]: Found specification of procedure l0l0 [2018-09-28 09:56:03,097 INFO L138 BoogieDeclarations]: Found implementation of procedure l0l0 [2018-09-28 09:56:03,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-28 09:56:03,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-28 09:56:03,098 INFO L130 BoogieDeclarations]: Found specification of procedure l1l1 [2018-09-28 09:56:03,098 INFO L138 BoogieDeclarations]: Found implementation of procedure l1l1 [2018-09-28 09:56:03,642 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-28 09:56:03,643 INFO L202 PluginConnector]: Adding new model threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 09:56:03 BoogieIcfgContainer [2018-09-28 09:56:03,643 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-28 09:56:03,644 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-28 09:56:03,644 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-28 09:56:03,648 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-28 09:56:03,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 09:56:02" (1/2) ... [2018-09-28 09:56:03,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f3c63a and model type threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.09 09:56:03, skipping insertion in model container [2018-09-28 09:56:03,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 09:56:03" (2/2) ... [2018-09-28 09:56:03,651 INFO L112 eAbstractionObserver]: Analyzing ICFG threadpooling_product_WithProcedures.bpl [2018-09-28 09:56:03,662 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-28 09:56:03,670 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-09-28 09:56:03,721 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-28 09:56:03,722 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-28 09:56:03,722 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-28 09:56:03,722 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-28 09:56:03,723 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-28 09:56:03,723 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-28 09:56:03,723 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-28 09:56:03,723 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-28 09:56:03,723 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-28 09:56:03,744 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2018-09-28 09:56:03,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-28 09:56:03,750 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:03,751 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:03,753 INFO L423 AbstractCegarLoop]: === Iteration 1 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:03,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:03,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1282157605, now seen corresponding path program 1 times [2018-09-28 09:56:03,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:03,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:03,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:03,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:03,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:03,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:04,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:04,032 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 09:56:04,033 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-28 09:56:04,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 09:56:04,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 09:56:04,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-09-28 09:56:04,051 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 6 states. [2018-09-28 09:56:04,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:04,824 INFO L93 Difference]: Finished difference Result 72 states and 100 transitions. [2018-09-28 09:56:04,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 09:56:04,828 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2018-09-28 09:56:04,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:04,841 INFO L225 Difference]: With dead ends: 72 [2018-09-28 09:56:04,842 INFO L226 Difference]: Without dead ends: 70 [2018-09-28 09:56:04,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-09-28 09:56:04,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-28 09:56:04,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 48. [2018-09-28 09:56:04,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-28 09:56:04,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2018-09-28 09:56:04,895 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 7 [2018-09-28 09:56:04,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:04,896 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2018-09-28 09:56:04,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 09:56:04,896 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2018-09-28 09:56:04,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-28 09:56:04,897 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:04,897 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:04,898 INFO L423 AbstractCegarLoop]: === Iteration 2 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:04,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:04,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1272619553, now seen corresponding path program 1 times [2018-09-28 09:56:04,899 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:04,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:04,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:04,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:04,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:04,979 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 09:56:04,980 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-28 09:56:04,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 09:56:04,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 09:56:04,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-09-28 09:56:04,983 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 6 states. [2018-09-28 09:56:05,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:05,783 INFO L93 Difference]: Finished difference Result 81 states and 113 transitions. [2018-09-28 09:56:05,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 09:56:05,790 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2018-09-28 09:56:05,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:05,794 INFO L225 Difference]: With dead ends: 81 [2018-09-28 09:56:05,794 INFO L226 Difference]: Without dead ends: 79 [2018-09-28 09:56:05,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-09-28 09:56:05,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-28 09:56:05,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 57. [2018-09-28 09:56:05,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-28 09:56:05,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 78 transitions. [2018-09-28 09:56:05,821 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 78 transitions. Word has length 7 [2018-09-28 09:56:05,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:05,821 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 78 transitions. [2018-09-28 09:56:05,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 09:56:05,821 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 78 transitions. [2018-09-28 09:56:05,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-28 09:56:05,823 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:05,823 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:05,825 INFO L423 AbstractCegarLoop]: === Iteration 3 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:05,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:05,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1601446133, now seen corresponding path program 1 times [2018-09-28 09:56:05,826 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:05,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:05,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:05,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:05,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:05,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:05,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:05,967 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 09:56:05,967 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-28 09:56:05,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 09:56:05,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 09:56:05,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-09-28 09:56:05,968 INFO L87 Difference]: Start difference. First operand 57 states and 78 transitions. Second operand 7 states. [2018-09-28 09:56:06,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:06,793 INFO L93 Difference]: Finished difference Result 122 states and 175 transitions. [2018-09-28 09:56:06,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 09:56:06,798 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-09-28 09:56:06,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:06,801 INFO L225 Difference]: With dead ends: 122 [2018-09-28 09:56:06,801 INFO L226 Difference]: Without dead ends: 120 [2018-09-28 09:56:06,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2018-09-28 09:56:06,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-28 09:56:06,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 73. [2018-09-28 09:56:06,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-28 09:56:06,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 103 transitions. [2018-09-28 09:56:06,819 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 103 transitions. Word has length 10 [2018-09-28 09:56:06,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:06,820 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 103 transitions. [2018-09-28 09:56:06,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 09:56:06,820 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 103 transitions. [2018-09-28 09:56:06,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-28 09:56:06,821 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:06,822 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:06,822 INFO L423 AbstractCegarLoop]: === Iteration 4 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:06,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:06,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1152651256, now seen corresponding path program 1 times [2018-09-28 09:56:06,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:06,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:06,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:06,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:06,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:06,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:06,953 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:06,953 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:06,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:06,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:07,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:07,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:07,187 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-28 09:56:07,187 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2018-09-28 09:56:07,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 09:56:07,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 09:56:07,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-09-28 09:56:07,189 INFO L87 Difference]: Start difference. First operand 73 states and 103 transitions. Second operand 9 states. [2018-09-28 09:56:07,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:07,900 INFO L93 Difference]: Finished difference Result 168 states and 243 transitions. [2018-09-28 09:56:07,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-28 09:56:07,901 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2018-09-28 09:56:07,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:07,903 INFO L225 Difference]: With dead ends: 168 [2018-09-28 09:56:07,903 INFO L226 Difference]: Without dead ends: 121 [2018-09-28 09:56:07,905 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2018-09-28 09:56:07,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-28 09:56:07,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 97. [2018-09-28 09:56:07,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-28 09:56:07,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 136 transitions. [2018-09-28 09:56:07,927 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 136 transitions. Word has length 10 [2018-09-28 09:56:07,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:07,927 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 136 transitions. [2018-09-28 09:56:07,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 09:56:07,928 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 136 transitions. [2018-09-28 09:56:07,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 09:56:07,929 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:07,930 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:07,930 INFO L423 AbstractCegarLoop]: === Iteration 5 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:07,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:07,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1536370777, now seen corresponding path program 1 times [2018-09-28 09:56:07,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:07,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:07,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:07,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:07,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:08,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:08,018 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:08,019 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:08,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:08,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:08,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:08,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:08,273 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:08,273 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-28 09:56:08,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 09:56:08,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 09:56:08,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-09-28 09:56:08,275 INFO L87 Difference]: Start difference. First operand 97 states and 136 transitions. Second operand 10 states. [2018-09-28 09:56:08,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:08,960 INFO L93 Difference]: Finished difference Result 164 states and 232 transitions. [2018-09-28 09:56:08,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 09:56:08,961 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2018-09-28 09:56:08,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:08,964 INFO L225 Difference]: With dead ends: 164 [2018-09-28 09:56:08,964 INFO L226 Difference]: Without dead ends: 162 [2018-09-28 09:56:08,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-09-28 09:56:08,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-28 09:56:08,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 109. [2018-09-28 09:56:08,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-28 09:56:08,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 154 transitions. [2018-09-28 09:56:08,987 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 154 transitions. Word has length 11 [2018-09-28 09:56:08,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:08,988 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 154 transitions. [2018-09-28 09:56:08,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 09:56:08,988 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 154 transitions. [2018-09-28 09:56:08,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 09:56:08,990 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:08,990 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:08,991 INFO L423 AbstractCegarLoop]: === Iteration 6 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:08,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:08,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1150793287, now seen corresponding path program 1 times [2018-09-28 09:56:08,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:08,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:08,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:08,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:08,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:09,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:09,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:09,092 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:09,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:09,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:09,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:09,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:09,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:09,259 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:09,260 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-28 09:56:09,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 09:56:09,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 09:56:09,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-09-28 09:56:09,261 INFO L87 Difference]: Start difference. First operand 109 states and 154 transitions. Second operand 10 states. [2018-09-28 09:56:10,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:10,204 INFO L93 Difference]: Finished difference Result 181 states and 254 transitions. [2018-09-28 09:56:10,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 09:56:10,206 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2018-09-28 09:56:10,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:10,208 INFO L225 Difference]: With dead ends: 181 [2018-09-28 09:56:10,209 INFO L226 Difference]: Without dead ends: 179 [2018-09-28 09:56:10,209 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-09-28 09:56:10,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-28 09:56:10,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 117. [2018-09-28 09:56:10,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-28 09:56:10,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 164 transitions. [2018-09-28 09:56:10,234 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 164 transitions. Word has length 11 [2018-09-28 09:56:10,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:10,234 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 164 transitions. [2018-09-28 09:56:10,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 09:56:10,235 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 164 transitions. [2018-09-28 09:56:10,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 09:56:10,236 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:10,237 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:10,237 INFO L423 AbstractCegarLoop]: === Iteration 7 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:10,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:10,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1829652612, now seen corresponding path program 1 times [2018-09-28 09:56:10,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:10,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:10,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:10,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:10,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:10,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:10,361 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:10,362 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:10,370 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:10,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:10,582 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-28 09:56:10,582 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2018-09-28 09:56:10,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 09:56:10,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 09:56:10,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-28 09:56:10,588 INFO L87 Difference]: Start difference. First operand 117 states and 164 transitions. Second operand 9 states. [2018-09-28 09:56:11,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:11,934 INFO L93 Difference]: Finished difference Result 217 states and 304 transitions. [2018-09-28 09:56:11,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-28 09:56:11,935 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2018-09-28 09:56:11,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:11,936 INFO L225 Difference]: With dead ends: 217 [2018-09-28 09:56:11,936 INFO L226 Difference]: Without dead ends: 133 [2018-09-28 09:56:11,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=172, Invalid=380, Unknown=0, NotChecked=0, Total=552 [2018-09-28 09:56:11,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-28 09:56:11,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 119. [2018-09-28 09:56:11,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-28 09:56:11,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 160 transitions. [2018-09-28 09:56:11,958 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 160 transitions. Word has length 13 [2018-09-28 09:56:11,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:11,958 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 160 transitions. [2018-09-28 09:56:11,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 09:56:11,959 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 160 transitions. [2018-09-28 09:56:11,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 09:56:11,960 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:11,960 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:11,961 INFO L423 AbstractCegarLoop]: === Iteration 8 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:11,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:11,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1433054771, now seen corresponding path program 1 times [2018-09-28 09:56:11,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:11,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:11,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:11,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:11,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:11,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:12,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:12,050 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:12,050 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:12,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:12,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:12,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:12,411 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:12,411 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2018-09-28 09:56:12,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 09:56:12,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 09:56:12,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-09-28 09:56:12,412 INFO L87 Difference]: Start difference. First operand 119 states and 160 transitions. Second operand 13 states. [2018-09-28 09:56:13,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:13,992 INFO L93 Difference]: Finished difference Result 194 states and 266 transitions. [2018-09-28 09:56:13,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-28 09:56:13,993 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2018-09-28 09:56:13,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:13,995 INFO L225 Difference]: With dead ends: 194 [2018-09-28 09:56:13,995 INFO L226 Difference]: Without dead ends: 192 [2018-09-28 09:56:13,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2018-09-28 09:56:13,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-09-28 09:56:14,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 181. [2018-09-28 09:56:14,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-28 09:56:14,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 257 transitions. [2018-09-28 09:56:14,041 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 257 transitions. Word has length 14 [2018-09-28 09:56:14,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:14,042 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 257 transitions. [2018-09-28 09:56:14,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 09:56:14,042 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 257 transitions. [2018-09-28 09:56:14,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 09:56:14,043 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:14,044 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:14,045 INFO L423 AbstractCegarLoop]: === Iteration 9 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:14,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:14,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1436992942, now seen corresponding path program 1 times [2018-09-28 09:56:14,047 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:14,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:14,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:14,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:14,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:14,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:14,152 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:14,152 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:14,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:14,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:14,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:14,471 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:14,471 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2018-09-28 09:56:14,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 09:56:14,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 09:56:14,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2018-09-28 09:56:14,472 INFO L87 Difference]: Start difference. First operand 181 states and 257 transitions. Second operand 14 states. [2018-09-28 09:56:15,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:15,868 INFO L93 Difference]: Finished difference Result 246 states and 347 transitions. [2018-09-28 09:56:15,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-28 09:56:15,872 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-28 09:56:15,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:15,874 INFO L225 Difference]: With dead ends: 246 [2018-09-28 09:56:15,874 INFO L226 Difference]: Without dead ends: 244 [2018-09-28 09:56:15,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2018-09-28 09:56:15,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-09-28 09:56:15,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 193. [2018-09-28 09:56:15,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-28 09:56:15,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 274 transitions. [2018-09-28 09:56:15,908 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 274 transitions. Word has length 14 [2018-09-28 09:56:15,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:15,909 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 274 transitions. [2018-09-28 09:56:15,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 09:56:15,909 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 274 transitions. [2018-09-28 09:56:15,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 09:56:15,910 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:15,910 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:15,910 INFO L423 AbstractCegarLoop]: === Iteration 10 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:15,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:15,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1436993326, now seen corresponding path program 1 times [2018-09-28 09:56:15,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:15,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:15,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:15,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:15,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:15,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:15,989 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:15,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:16,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:16,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:16,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:16,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:16,205 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:16,205 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2018-09-28 09:56:16,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 09:56:16,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 09:56:16,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-09-28 09:56:16,207 INFO L87 Difference]: Start difference. First operand 193 states and 274 transitions. Second operand 14 states. [2018-09-28 09:56:18,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:18,181 INFO L93 Difference]: Finished difference Result 288 states and 406 transitions. [2018-09-28 09:56:18,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-28 09:56:18,183 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-28 09:56:18,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:18,186 INFO L225 Difference]: With dead ends: 288 [2018-09-28 09:56:18,186 INFO L226 Difference]: Without dead ends: 286 [2018-09-28 09:56:18,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=338, Invalid=1068, Unknown=0, NotChecked=0, Total=1406 [2018-09-28 09:56:18,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2018-09-28 09:56:18,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 221. [2018-09-28 09:56:18,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-28 09:56:18,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 315 transitions. [2018-09-28 09:56:18,221 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 315 transitions. Word has length 14 [2018-09-28 09:56:18,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:18,221 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 315 transitions. [2018-09-28 09:56:18,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 09:56:18,222 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 315 transitions. [2018-09-28 09:56:18,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 09:56:18,223 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:18,223 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:18,223 INFO L423 AbstractCegarLoop]: === Iteration 11 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:18,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:18,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1791986342, now seen corresponding path program 1 times [2018-09-28 09:56:18,224 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:18,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:18,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:18,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:18,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:18,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:18,334 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:18,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:18,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:18,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:18,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:18,481 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:18,481 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2018-09-28 09:56:18,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 09:56:18,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 09:56:18,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-28 09:56:18,482 INFO L87 Difference]: Start difference. First operand 221 states and 315 transitions. Second operand 14 states. [2018-09-28 09:56:19,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:19,364 INFO L93 Difference]: Finished difference Result 314 states and 443 transitions. [2018-09-28 09:56:19,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 09:56:19,367 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-28 09:56:19,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:19,369 INFO L225 Difference]: With dead ends: 314 [2018-09-28 09:56:19,369 INFO L226 Difference]: Without dead ends: 312 [2018-09-28 09:56:19,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=307, Invalid=815, Unknown=0, NotChecked=0, Total=1122 [2018-09-28 09:56:19,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2018-09-28 09:56:19,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 243. [2018-09-28 09:56:19,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-09-28 09:56:19,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 349 transitions. [2018-09-28 09:56:19,410 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 349 transitions. Word has length 14 [2018-09-28 09:56:19,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:19,410 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 349 transitions. [2018-09-28 09:56:19,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 09:56:19,410 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 349 transitions. [2018-09-28 09:56:19,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 09:56:19,411 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:19,411 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:19,412 INFO L423 AbstractCegarLoop]: === Iteration 12 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:19,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:19,412 INFO L82 PathProgramCache]: Analyzing trace with hash 844488035, now seen corresponding path program 1 times [2018-09-28 09:56:19,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:19,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:19,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:19,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:19,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:19,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:19,501 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:19,502 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:19,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:19,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:19,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:19,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:19,645 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:19,645 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2018-09-28 09:56:19,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 09:56:19,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 09:56:19,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-09-28 09:56:19,646 INFO L87 Difference]: Start difference. First operand 243 states and 349 transitions. Second operand 13 states. [2018-09-28 09:56:20,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:20,539 INFO L93 Difference]: Finished difference Result 322 states and 462 transitions. [2018-09-28 09:56:20,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-28 09:56:20,546 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2018-09-28 09:56:20,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:20,548 INFO L225 Difference]: With dead ends: 322 [2018-09-28 09:56:20,548 INFO L226 Difference]: Without dead ends: 320 [2018-09-28 09:56:20,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2018-09-28 09:56:20,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2018-09-28 09:56:20,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 302. [2018-09-28 09:56:20,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2018-09-28 09:56:20,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 444 transitions. [2018-09-28 09:56:20,609 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 444 transitions. Word has length 14 [2018-09-28 09:56:20,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:20,609 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 444 transitions. [2018-09-28 09:56:20,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 09:56:20,610 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 444 transitions. [2018-09-28 09:56:20,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 09:56:20,610 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:20,611 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:20,611 INFO L423 AbstractCegarLoop]: === Iteration 13 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:20,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:20,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1052420626, now seen corresponding path program 1 times [2018-09-28 09:56:20,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:20,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:20,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:20,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:20,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:20,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:20,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:20,740 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:20,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:20,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:20,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:20,915 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:20,915 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2018-09-28 09:56:20,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 09:56:20,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 09:56:20,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-28 09:56:20,916 INFO L87 Difference]: Start difference. First operand 302 states and 444 transitions. Second operand 14 states. [2018-09-28 09:56:22,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:22,434 INFO L93 Difference]: Finished difference Result 378 states and 544 transitions. [2018-09-28 09:56:22,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 09:56:22,435 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-28 09:56:22,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:22,437 INFO L225 Difference]: With dead ends: 378 [2018-09-28 09:56:22,437 INFO L226 Difference]: Without dead ends: 376 [2018-09-28 09:56:22,438 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=307, Invalid=815, Unknown=0, NotChecked=0, Total=1122 [2018-09-28 09:56:22,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2018-09-28 09:56:22,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 301. [2018-09-28 09:56:22,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2018-09-28 09:56:22,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 443 transitions. [2018-09-28 09:56:22,512 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 443 transitions. Word has length 14 [2018-09-28 09:56:22,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:22,513 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 443 transitions. [2018-09-28 09:56:22,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 09:56:22,513 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 443 transitions. [2018-09-28 09:56:22,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 09:56:22,514 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:22,514 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:22,514 INFO L423 AbstractCegarLoop]: === Iteration 14 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:22,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:22,515 INFO L82 PathProgramCache]: Analyzing trace with hash 697427610, now seen corresponding path program 1 times [2018-09-28 09:56:22,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:22,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:22,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:22,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:22,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:22,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:22,606 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:22,606 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:22,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:22,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:22,820 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:22,820 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 14 [2018-09-28 09:56:22,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 09:56:22,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 09:56:22,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2018-09-28 09:56:22,821 INFO L87 Difference]: Start difference. First operand 301 states and 443 transitions. Second operand 15 states. [2018-09-28 09:56:24,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:24,303 INFO L93 Difference]: Finished difference Result 395 states and 572 transitions. [2018-09-28 09:56:24,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-28 09:56:24,304 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-09-28 09:56:24,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:24,306 INFO L225 Difference]: With dead ends: 395 [2018-09-28 09:56:24,306 INFO L226 Difference]: Without dead ends: 393 [2018-09-28 09:56:24,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=347, Invalid=1135, Unknown=0, NotChecked=0, Total=1482 [2018-09-28 09:56:24,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2018-09-28 09:56:24,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 312. [2018-09-28 09:56:24,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2018-09-28 09:56:24,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 459 transitions. [2018-09-28 09:56:24,361 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 459 transitions. Word has length 14 [2018-09-28 09:56:24,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:24,362 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 459 transitions. [2018-09-28 09:56:24,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 09:56:24,362 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 459 transitions. [2018-09-28 09:56:24,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 09:56:24,363 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:24,363 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:24,363 INFO L423 AbstractCegarLoop]: === Iteration 15 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:24,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:24,364 INFO L82 PathProgramCache]: Analyzing trace with hash 697427226, now seen corresponding path program 1 times [2018-09-28 09:56:24,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:24,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:24,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:24,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:24,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:24,458 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:24,458 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:24,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:24,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:24,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:24,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:24,667 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:24,668 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2018-09-28 09:56:24,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 09:56:24,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 09:56:24,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-28 09:56:24,669 INFO L87 Difference]: Start difference. First operand 312 states and 459 transitions. Second operand 13 states. [2018-09-28 09:56:26,128 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-09-28 09:56:27,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:27,268 INFO L93 Difference]: Finished difference Result 383 states and 560 transitions. [2018-09-28 09:56:27,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-28 09:56:27,269 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2018-09-28 09:56:27,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:27,271 INFO L225 Difference]: With dead ends: 383 [2018-09-28 09:56:27,272 INFO L226 Difference]: Without dead ends: 381 [2018-09-28 09:56:27,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2018-09-28 09:56:27,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2018-09-28 09:56:27,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 328. [2018-09-28 09:56:27,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-09-28 09:56:27,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 482 transitions. [2018-09-28 09:56:27,336 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 482 transitions. Word has length 14 [2018-09-28 09:56:27,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:27,336 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 482 transitions. [2018-09-28 09:56:27,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 09:56:27,336 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 482 transitions. [2018-09-28 09:56:27,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 09:56:27,337 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:27,338 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:27,338 INFO L423 AbstractCegarLoop]: === Iteration 16 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:27,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:27,338 INFO L82 PathProgramCache]: Analyzing trace with hash 406900684, now seen corresponding path program 1 times [2018-09-28 09:56:27,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:27,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:27,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:27,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:27,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:27,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:27,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:27,525 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:27,525 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:27,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:27,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:27,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:27,726 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:27,726 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2018-09-28 09:56:27,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-28 09:56:27,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-28 09:56:27,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2018-09-28 09:56:27,727 INFO L87 Difference]: Start difference. First operand 328 states and 482 transitions. Second operand 16 states. [2018-09-28 09:56:29,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:29,158 INFO L93 Difference]: Finished difference Result 429 states and 618 transitions. [2018-09-28 09:56:29,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-28 09:56:29,159 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2018-09-28 09:56:29,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:29,161 INFO L225 Difference]: With dead ends: 429 [2018-09-28 09:56:29,161 INFO L226 Difference]: Without dead ends: 427 [2018-09-28 09:56:29,163 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=579, Invalid=1401, Unknown=0, NotChecked=0, Total=1980 [2018-09-28 09:56:29,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2018-09-28 09:56:29,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 242. [2018-09-28 09:56:29,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-09-28 09:56:29,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 351 transitions. [2018-09-28 09:56:29,236 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 351 transitions. Word has length 17 [2018-09-28 09:56:29,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:29,237 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 351 transitions. [2018-09-28 09:56:29,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-28 09:56:29,237 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 351 transitions. [2018-09-28 09:56:29,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 09:56:29,238 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:29,238 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:29,239 INFO L423 AbstractCegarLoop]: === Iteration 17 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:29,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:29,239 INFO L82 PathProgramCache]: Analyzing trace with hash 2143481530, now seen corresponding path program 1 times [2018-09-28 09:56:29,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:29,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:29,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:29,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:29,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:29,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:29,596 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:29,596 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:29,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:29,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:29,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:29,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:29,796 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:29,796 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2018-09-28 09:56:29,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-28 09:56:29,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-28 09:56:29,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2018-09-28 09:56:29,797 INFO L87 Difference]: Start difference. First operand 242 states and 351 transitions. Second operand 16 states. [2018-09-28 09:56:31,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:31,238 INFO L93 Difference]: Finished difference Result 330 states and 466 transitions. [2018-09-28 09:56:31,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-28 09:56:31,238 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2018-09-28 09:56:31,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:31,240 INFO L225 Difference]: With dead ends: 330 [2018-09-28 09:56:31,240 INFO L226 Difference]: Without dead ends: 328 [2018-09-28 09:56:31,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=579, Invalid=1401, Unknown=0, NotChecked=0, Total=1980 [2018-09-28 09:56:31,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2018-09-28 09:56:31,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 158. [2018-09-28 09:56:31,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-28 09:56:31,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 226 transitions. [2018-09-28 09:56:31,296 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 226 transitions. Word has length 17 [2018-09-28 09:56:31,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:31,297 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 226 transitions. [2018-09-28 09:56:31,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-28 09:56:31,297 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 226 transitions. [2018-09-28 09:56:31,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 09:56:31,298 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:31,298 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:31,298 INFO L423 AbstractCegarLoop]: === Iteration 18 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:31,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:31,298 INFO L82 PathProgramCache]: Analyzing trace with hash -653821292, now seen corresponding path program 1 times [2018-09-28 09:56:31,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:31,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:31,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:31,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:31,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:31,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:31,914 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:31,914 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:31,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:31,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:32,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:32,132 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:32,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2018-09-28 09:56:32,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-28 09:56:32,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-28 09:56:32,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-09-28 09:56:32,134 INFO L87 Difference]: Start difference. First operand 158 states and 226 transitions. Second operand 12 states. [2018-09-28 09:56:32,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:32,677 INFO L93 Difference]: Finished difference Result 271 states and 380 transitions. [2018-09-28 09:56:32,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-28 09:56:32,682 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2018-09-28 09:56:32,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:32,683 INFO L225 Difference]: With dead ends: 271 [2018-09-28 09:56:32,683 INFO L226 Difference]: Without dead ends: 269 [2018-09-28 09:56:32,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2018-09-28 09:56:32,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-09-28 09:56:32,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 180. [2018-09-28 09:56:32,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-09-28 09:56:32,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 258 transitions. [2018-09-28 09:56:32,760 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 258 transitions. Word has length 18 [2018-09-28 09:56:32,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:32,760 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 258 transitions. [2018-09-28 09:56:32,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-28 09:56:32,761 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 258 transitions. [2018-09-28 09:56:32,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 09:56:32,762 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:32,762 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:32,762 INFO L423 AbstractCegarLoop]: === Iteration 19 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:32,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:32,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1014964826, now seen corresponding path program 1 times [2018-09-28 09:56:32,763 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:32,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:32,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:32,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:32,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:32,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:33,208 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:33,208 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) [2018-09-28 09:56:33,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:33,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:33,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:33,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:33,342 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-28 09:56:33,342 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2018-09-28 09:56:33,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 09:56:33,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 09:56:33,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-09-28 09:56:33,343 INFO L87 Difference]: Start difference. First operand 180 states and 258 transitions. Second operand 13 states. [2018-09-28 09:56:35,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:35,774 INFO L93 Difference]: Finished difference Result 741 states and 1047 transitions. [2018-09-28 09:56:35,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-28 09:56:35,774 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-28 09:56:35,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:35,777 INFO L225 Difference]: With dead ends: 741 [2018-09-28 09:56:35,777 INFO L226 Difference]: Without dead ends: 564 [2018-09-28 09:56:35,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2559 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1290, Invalid=6192, Unknown=0, NotChecked=0, Total=7482 [2018-09-28 09:56:35,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2018-09-28 09:56:35,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 341. [2018-09-28 09:56:35,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-09-28 09:56:35,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 486 transitions. [2018-09-28 09:56:35,915 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 486 transitions. Word has length 18 [2018-09-28 09:56:35,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:35,916 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 486 transitions. [2018-09-28 09:56:35,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 09:56:35,916 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 486 transitions. [2018-09-28 09:56:35,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 09:56:35,917 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:35,917 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:35,917 INFO L423 AbstractCegarLoop]: === Iteration 20 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:35,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:35,917 INFO L82 PathProgramCache]: Analyzing trace with hash -155045024, now seen corresponding path program 1 times [2018-09-28 09:56:35,918 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:35,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:35,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:35,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:35,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:35,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:36,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:36,014 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:36,014 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:36,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:36,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:36,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:36,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:36,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2018-09-28 09:56:36,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 09:56:36,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 09:56:36,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-09-28 09:56:36,159 INFO L87 Difference]: Start difference. First operand 341 states and 486 transitions. Second operand 13 states. [2018-09-28 09:56:38,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:38,144 INFO L93 Difference]: Finished difference Result 809 states and 1155 transitions. [2018-09-28 09:56:38,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-28 09:56:38,144 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-28 09:56:38,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:38,147 INFO L225 Difference]: With dead ends: 809 [2018-09-28 09:56:38,147 INFO L226 Difference]: Without dead ends: 470 [2018-09-28 09:56:38,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=462, Invalid=1518, Unknown=0, NotChecked=0, Total=1980 [2018-09-28 09:56:38,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2018-09-28 09:56:38,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 368. [2018-09-28 09:56:38,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2018-09-28 09:56:38,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 523 transitions. [2018-09-28 09:56:38,323 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 523 transitions. Word has length 18 [2018-09-28 09:56:38,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:38,324 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 523 transitions. [2018-09-28 09:56:38,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 09:56:38,324 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 523 transitions. [2018-09-28 09:56:38,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 09:56:38,325 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:38,325 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:38,325 INFO L423 AbstractCegarLoop]: === Iteration 21 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:38,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:38,326 INFO L82 PathProgramCache]: Analyzing trace with hash 393788879, now seen corresponding path program 1 times [2018-09-28 09:56:38,326 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:38,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:38,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:38,327 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:38,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:38,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:38,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:38,870 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:38,870 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:38,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:38,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:38,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:39,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:39,039 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:39,040 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-28 09:56:39,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 09:56:39,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 09:56:39,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-28 09:56:39,040 INFO L87 Difference]: Start difference. First operand 368 states and 523 transitions. Second operand 13 states. [2018-09-28 09:56:40,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:40,728 INFO L93 Difference]: Finished difference Result 1106 states and 1568 transitions. [2018-09-28 09:56:40,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-28 09:56:40,728 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-28 09:56:40,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:40,731 INFO L225 Difference]: With dead ends: 1106 [2018-09-28 09:56:40,731 INFO L226 Difference]: Without dead ends: 724 [2018-09-28 09:56:40,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=678, Invalid=2628, Unknown=0, NotChecked=0, Total=3306 [2018-09-28 09:56:40,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2018-09-28 09:56:40,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 519. [2018-09-28 09:56:40,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 519 states. [2018-09-28 09:56:40,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 739 transitions. [2018-09-28 09:56:40,897 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 739 transitions. Word has length 18 [2018-09-28 09:56:40,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:40,897 INFO L480 AbstractCegarLoop]: Abstraction has 519 states and 739 transitions. [2018-09-28 09:56:40,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 09:56:40,898 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 739 transitions. [2018-09-28 09:56:40,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 09:56:40,898 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:40,898 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:40,899 INFO L423 AbstractCegarLoop]: === Iteration 22 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:40,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:40,899 INFO L82 PathProgramCache]: Analyzing trace with hash -216264799, now seen corresponding path program 1 times [2018-09-28 09:56:40,899 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:40,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:40,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:40,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:40,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:40,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:41,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:41,012 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:41,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:41,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:41,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:41,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:41,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:41,173 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:41,173 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2018-09-28 09:56:41,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 09:56:41,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 09:56:41,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-28 09:56:41,176 INFO L87 Difference]: Start difference. First operand 519 states and 739 transitions. Second operand 11 states. [2018-09-28 09:56:42,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:42,883 INFO L93 Difference]: Finished difference Result 711 states and 1002 transitions. [2018-09-28 09:56:42,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 09:56:42,883 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2018-09-28 09:56:42,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:42,886 INFO L225 Difference]: With dead ends: 711 [2018-09-28 09:56:42,887 INFO L226 Difference]: Without dead ends: 709 [2018-09-28 09:56:42,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2018-09-28 09:56:42,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2018-09-28 09:56:43,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 498. [2018-09-28 09:56:43,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498 states. [2018-09-28 09:56:43,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 704 transitions. [2018-09-28 09:56:43,060 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 704 transitions. Word has length 18 [2018-09-28 09:56:43,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:43,061 INFO L480 AbstractCegarLoop]: Abstraction has 498 states and 704 transitions. [2018-09-28 09:56:43,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 09:56:43,061 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 704 transitions. [2018-09-28 09:56:43,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 09:56:43,062 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:43,062 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:43,062 INFO L423 AbstractCegarLoop]: === Iteration 23 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:43,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:43,062 INFO L82 PathProgramCache]: Analyzing trace with hash 983482113, now seen corresponding path program 1 times [2018-09-28 09:56:43,062 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:43,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:43,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:43,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:43,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:43,275 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:43,275 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:43,283 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:43,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:43,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:43,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:43,509 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-28 09:56:43,509 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 13 [2018-09-28 09:56:43,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 09:56:43,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 09:56:43,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-09-28 09:56:43,510 INFO L87 Difference]: Start difference. First operand 498 states and 704 transitions. Second operand 13 states. [2018-09-28 09:56:45,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:45,268 INFO L93 Difference]: Finished difference Result 1319 states and 1864 transitions. [2018-09-28 09:56:45,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-28 09:56:45,268 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-28 09:56:45,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:45,271 INFO L225 Difference]: With dead ends: 1319 [2018-09-28 09:56:45,271 INFO L226 Difference]: Without dead ends: 823 [2018-09-28 09:56:45,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=477, Invalid=1415, Unknown=0, NotChecked=0, Total=1892 [2018-09-28 09:56:45,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2018-09-28 09:56:45,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 566. [2018-09-28 09:56:45,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2018-09-28 09:56:45,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 809 transitions. [2018-09-28 09:56:45,482 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 809 transitions. Word has length 18 [2018-09-28 09:56:45,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:45,482 INFO L480 AbstractCegarLoop]: Abstraction has 566 states and 809 transitions. [2018-09-28 09:56:45,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 09:56:45,482 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 809 transitions. [2018-09-28 09:56:45,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 09:56:45,483 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:45,483 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:45,484 INFO L423 AbstractCegarLoop]: === Iteration 24 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:45,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:45,484 INFO L82 PathProgramCache]: Analyzing trace with hash 801556786, now seen corresponding path program 1 times [2018-09-28 09:56:45,484 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:45,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:45,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:45,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:45,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:45,689 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:45,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:45,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:45,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:45,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:45,830 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:45,830 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2018-09-28 09:56:45,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-28 09:56:45,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-28 09:56:45,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-09-28 09:56:45,831 INFO L87 Difference]: Start difference. First operand 566 states and 809 transitions. Second operand 12 states. [2018-09-28 09:56:46,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:46,628 INFO L93 Difference]: Finished difference Result 766 states and 1086 transitions. [2018-09-28 09:56:46,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-28 09:56:46,628 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2018-09-28 09:56:46,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:46,631 INFO L225 Difference]: With dead ends: 766 [2018-09-28 09:56:46,631 INFO L226 Difference]: Without dead ends: 764 [2018-09-28 09:56:46,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2018-09-28 09:56:46,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2018-09-28 09:56:46,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 608. [2018-09-28 09:56:46,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608 states. [2018-09-28 09:56:46,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 869 transitions. [2018-09-28 09:56:46,856 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 869 transitions. Word has length 18 [2018-09-28 09:56:46,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:46,856 INFO L480 AbstractCegarLoop]: Abstraction has 608 states and 869 transitions. [2018-09-28 09:56:46,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-28 09:56:46,856 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 869 transitions. [2018-09-28 09:56:46,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 09:56:46,857 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:46,857 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:46,858 INFO L423 AbstractCegarLoop]: === Iteration 25 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:46,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:46,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1593301430, now seen corresponding path program 1 times [2018-09-28 09:56:46,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:46,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:46,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:46,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:46,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:47,341 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:47,341 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:47,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:47,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:47,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:47,459 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-28 09:56:47,459 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2018-09-28 09:56:47,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 09:56:47,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 09:56:47,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-09-28 09:56:47,460 INFO L87 Difference]: Start difference. First operand 608 states and 869 transitions. Second operand 13 states. [2018-09-28 09:56:50,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:50,303 INFO L93 Difference]: Finished difference Result 2095 states and 2968 transitions. [2018-09-28 09:56:50,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-28 09:56:50,303 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-28 09:56:50,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:50,308 INFO L225 Difference]: With dead ends: 2095 [2018-09-28 09:56:50,308 INFO L226 Difference]: Without dead ends: 1329 [2018-09-28 09:56:50,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2559 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1290, Invalid=6192, Unknown=0, NotChecked=0, Total=7482 [2018-09-28 09:56:50,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2018-09-28 09:56:50,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 992. [2018-09-28 09:56:50,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2018-09-28 09:56:50,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1402 transitions. [2018-09-28 09:56:50,620 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1402 transitions. Word has length 18 [2018-09-28 09:56:50,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:50,620 INFO L480 AbstractCegarLoop]: Abstraction has 992 states and 1402 transitions. [2018-09-28 09:56:50,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 09:56:50,620 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1402 transitions. [2018-09-28 09:56:50,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 09:56:50,621 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:50,621 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:50,621 INFO L423 AbstractCegarLoop]: === Iteration 26 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:50,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:50,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1366841759, now seen corresponding path program 1 times [2018-09-28 09:56:50,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:50,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:50,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:50,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:50,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:50,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:50,742 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:50,742 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:50,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:50,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:50,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:50,835 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:50,835 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2018-09-28 09:56:50,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 09:56:50,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 09:56:50,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-28 09:56:50,836 INFO L87 Difference]: Start difference. First operand 992 states and 1402 transitions. Second operand 11 states. [2018-09-28 09:56:52,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:52,187 INFO L93 Difference]: Finished difference Result 1291 states and 1819 transitions. [2018-09-28 09:56:52,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 09:56:52,187 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2018-09-28 09:56:52,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:52,192 INFO L225 Difference]: With dead ends: 1291 [2018-09-28 09:56:52,192 INFO L226 Difference]: Without dead ends: 1289 [2018-09-28 09:56:52,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2018-09-28 09:56:52,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2018-09-28 09:56:52,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1028. [2018-09-28 09:56:52,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1028 states. [2018-09-28 09:56:52,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1454 transitions. [2018-09-28 09:56:52,520 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1454 transitions. Word has length 18 [2018-09-28 09:56:52,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:52,520 INFO L480 AbstractCegarLoop]: Abstraction has 1028 states and 1454 transitions. [2018-09-28 09:56:52,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 09:56:52,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1454 transitions. [2018-09-28 09:56:52,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 09:56:52,521 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:52,521 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:52,522 INFO L423 AbstractCegarLoop]: === Iteration 27 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:52,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:52,522 INFO L82 PathProgramCache]: Analyzing trace with hash -817918193, now seen corresponding path program 1 times [2018-09-28 09:56:52,522 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:52,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:52,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:52,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:52,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:52,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:52,846 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:52,846 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:52,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:52,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:52,983 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-28 09:56:52,983 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 13 [2018-09-28 09:56:52,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 09:56:52,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 09:56:52,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-09-28 09:56:52,984 INFO L87 Difference]: Start difference. First operand 1028 states and 1454 transitions. Second operand 13 states. [2018-09-28 09:56:54,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:54,580 INFO L93 Difference]: Finished difference Result 2222 states and 3144 transitions. [2018-09-28 09:56:54,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-28 09:56:54,581 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-28 09:56:54,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:54,585 INFO L225 Difference]: With dead ends: 2222 [2018-09-28 09:56:54,585 INFO L226 Difference]: Without dead ends: 1132 [2018-09-28 09:56:54,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=477, Invalid=1415, Unknown=0, NotChecked=0, Total=1892 [2018-09-28 09:56:54,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2018-09-28 09:56:54,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 831. [2018-09-28 09:56:54,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 831 states. [2018-09-28 09:56:54,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1173 transitions. [2018-09-28 09:56:54,869 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1173 transitions. Word has length 18 [2018-09-28 09:56:54,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:54,869 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 1173 transitions. [2018-09-28 09:56:54,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 09:56:54,869 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1173 transitions. [2018-09-28 09:56:54,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 09:56:54,870 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:54,870 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:54,871 INFO L423 AbstractCegarLoop]: === Iteration 28 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:54,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:54,871 INFO L82 PathProgramCache]: Analyzing trace with hash -228224959, now seen corresponding path program 1 times [2018-09-28 09:56:54,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:54,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:54,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:54,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:54,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:54,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:54,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:54,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:54,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:55,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:55,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:55,136 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:55,136 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-28 09:56:55,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 09:56:55,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 09:56:55,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-28 09:56:55,137 INFO L87 Difference]: Start difference. First operand 831 states and 1173 transitions. Second operand 13 states. [2018-09-28 09:56:57,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:57,365 INFO L93 Difference]: Finished difference Result 1989 states and 2785 transitions. [2018-09-28 09:56:57,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-28 09:56:57,365 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-28 09:56:57,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:57,370 INFO L225 Difference]: With dead ends: 1989 [2018-09-28 09:56:57,370 INFO L226 Difference]: Without dead ends: 1130 [2018-09-28 09:56:57,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=678, Invalid=2628, Unknown=0, NotChecked=0, Total=3306 [2018-09-28 09:56:57,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2018-09-28 09:56:57,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 806. [2018-09-28 09:56:57,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 806 states. [2018-09-28 09:56:57,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1135 transitions. [2018-09-28 09:56:57,654 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1135 transitions. Word has length 18 [2018-09-28 09:56:57,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:57,655 INFO L480 AbstractCegarLoop]: Abstraction has 806 states and 1135 transitions. [2018-09-28 09:56:57,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 09:56:57,655 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1135 transitions. [2018-09-28 09:56:57,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-28 09:56:57,656 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:57,656 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:57,656 INFO L423 AbstractCegarLoop]: === Iteration 29 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:57,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:57,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1122647006, now seen corresponding path program 1 times [2018-09-28 09:56:57,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:57,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:57,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:57,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:57,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:57,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:58,004 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:58,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:58,012 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:58,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:58,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:56:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:58,129 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:56:58,129 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-09-28 09:56:58,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 09:56:58,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 09:56:58,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2018-09-28 09:56:58,130 INFO L87 Difference]: Start difference. First operand 806 states and 1135 transitions. Second operand 11 states. [2018-09-28 09:56:59,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:56:59,464 INFO L93 Difference]: Finished difference Result 1022 states and 1428 transitions. [2018-09-28 09:56:59,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-28 09:56:59,464 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2018-09-28 09:56:59,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:56:59,469 INFO L225 Difference]: With dead ends: 1022 [2018-09-28 09:56:59,469 INFO L226 Difference]: Without dead ends: 1020 [2018-09-28 09:56:59,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=727, Unknown=0, NotChecked=0, Total=930 [2018-09-28 09:56:59,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2018-09-28 09:56:59,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 838. [2018-09-28 09:56:59,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 838 states. [2018-09-28 09:56:59,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1182 transitions. [2018-09-28 09:56:59,752 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1182 transitions. Word has length 22 [2018-09-28 09:56:59,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:56:59,752 INFO L480 AbstractCegarLoop]: Abstraction has 838 states and 1182 transitions. [2018-09-28 09:56:59,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 09:56:59,752 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1182 transitions. [2018-09-28 09:56:59,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-28 09:56:59,753 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:56:59,754 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:56:59,754 INFO L423 AbstractCegarLoop]: === Iteration 30 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:56:59,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:56:59,754 INFO L82 PathProgramCache]: Analyzing trace with hash 15880131, now seen corresponding path program 1 times [2018-09-28 09:56:59,754 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:56:59,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:56:59,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:59,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:59,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:56:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:59,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:56:59,943 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:56:59,943 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:56:59,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:56:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:56:59,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:57:00,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:00,039 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:57:00,039 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-09-28 09:57:00,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 09:57:00,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 09:57:00,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-09-28 09:57:00,040 INFO L87 Difference]: Start difference. First operand 838 states and 1182 transitions. Second operand 10 states. [2018-09-28 09:57:01,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:57:01,715 INFO L93 Difference]: Finished difference Result 1127 states and 1575 transitions. [2018-09-28 09:57:01,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 09:57:01,715 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2018-09-28 09:57:01,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:57:01,719 INFO L225 Difference]: With dead ends: 1127 [2018-09-28 09:57:01,719 INFO L226 Difference]: Without dead ends: 1125 [2018-09-28 09:57:01,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2018-09-28 09:57:01,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2018-09-28 09:57:02,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 852. [2018-09-28 09:57:02,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 852 states. [2018-09-28 09:57:02,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1203 transitions. [2018-09-28 09:57:02,034 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1203 transitions. Word has length 22 [2018-09-28 09:57:02,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:57:02,035 INFO L480 AbstractCegarLoop]: Abstraction has 852 states and 1203 transitions. [2018-09-28 09:57:02,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 09:57:02,035 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1203 transitions. [2018-09-28 09:57:02,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-28 09:57:02,036 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:57:02,036 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:57:02,037 INFO L423 AbstractCegarLoop]: === Iteration 31 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:57:02,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:57:02,037 INFO L82 PathProgramCache]: Analyzing trace with hash -510719313, now seen corresponding path program 1 times [2018-09-28 09:57:02,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:57:02,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:57:02,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:02,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:02,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:02,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:02,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:02,148 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:57:02,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:57:02,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:02,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:02,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:57:02,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:02,788 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:57:02,789 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-28 09:57:02,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 09:57:02,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 09:57:02,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-09-28 09:57:02,789 INFO L87 Difference]: Start difference. First operand 852 states and 1203 transitions. Second operand 14 states. [2018-09-28 09:57:04,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:57:04,474 INFO L93 Difference]: Finished difference Result 1127 states and 1578 transitions. [2018-09-28 09:57:04,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-28 09:57:04,475 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2018-09-28 09:57:04,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:57:04,478 INFO L225 Difference]: With dead ends: 1127 [2018-09-28 09:57:04,478 INFO L226 Difference]: Without dead ends: 1125 [2018-09-28 09:57:04,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=548, Invalid=1432, Unknown=0, NotChecked=0, Total=1980 [2018-09-28 09:57:04,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2018-09-28 09:57:04,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 830. [2018-09-28 09:57:04,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 830 states. [2018-09-28 09:57:04,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1171 transitions. [2018-09-28 09:57:04,762 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1171 transitions. Word has length 22 [2018-09-28 09:57:04,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:57:04,762 INFO L480 AbstractCegarLoop]: Abstraction has 830 states and 1171 transitions. [2018-09-28 09:57:04,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 09:57:04,762 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1171 transitions. [2018-09-28 09:57:04,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-28 09:57:04,764 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:57:04,764 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:57:04,764 INFO L423 AbstractCegarLoop]: === Iteration 32 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:57:04,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:57:04,764 INFO L82 PathProgramCache]: Analyzing trace with hash 627807824, now seen corresponding path program 1 times [2018-09-28 09:57:04,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:57:04,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:57:04,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:04,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:04,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:04,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:04,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:04,879 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:57:04,879 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:57:04,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:04,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:57:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:05,077 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:57:05,078 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2018-09-28 09:57:05,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 09:57:05,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 09:57:05,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2018-09-28 09:57:05,078 INFO L87 Difference]: Start difference. First operand 830 states and 1171 transitions. Second operand 15 states. [2018-09-28 09:57:06,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:57:06,603 INFO L93 Difference]: Finished difference Result 1072 states and 1499 transitions. [2018-09-28 09:57:06,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-28 09:57:06,604 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2018-09-28 09:57:06,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:57:06,607 INFO L225 Difference]: With dead ends: 1072 [2018-09-28 09:57:06,607 INFO L226 Difference]: Without dead ends: 1070 [2018-09-28 09:57:06,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2018-09-28 09:57:06,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2018-09-28 09:57:06,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 788. [2018-09-28 09:57:06,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 788 states. [2018-09-28 09:57:06,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1104 transitions. [2018-09-28 09:57:06,899 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1104 transitions. Word has length 22 [2018-09-28 09:57:06,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:57:06,899 INFO L480 AbstractCegarLoop]: Abstraction has 788 states and 1104 transitions. [2018-09-28 09:57:06,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 09:57:06,899 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1104 transitions. [2018-09-28 09:57:06,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-28 09:57:06,901 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:57:06,901 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:57:06,901 INFO L423 AbstractCegarLoop]: === Iteration 33 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:57:06,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:57:06,901 INFO L82 PathProgramCache]: Analyzing trace with hash 345073063, now seen corresponding path program 1 times [2018-09-28 09:57:06,902 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:57:06,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:57:06,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:06,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:06,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:06,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:07,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:07,007 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:57:07,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:57:07,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:07,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:07,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:57:07,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:07,120 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:57:07,120 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-09-28 09:57:07,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 09:57:07,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 09:57:07,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-09-28 09:57:07,121 INFO L87 Difference]: Start difference. First operand 788 states and 1104 transitions. Second operand 10 states. [2018-09-28 09:57:08,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:57:08,594 INFO L93 Difference]: Finished difference Result 1025 states and 1426 transitions. [2018-09-28 09:57:08,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 09:57:08,594 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2018-09-28 09:57:08,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:57:08,598 INFO L225 Difference]: With dead ends: 1025 [2018-09-28 09:57:08,598 INFO L226 Difference]: Without dead ends: 1023 [2018-09-28 09:57:08,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2018-09-28 09:57:08,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2018-09-28 09:57:08,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 818. [2018-09-28 09:57:08,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 818 states. [2018-09-28 09:57:08,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1149 transitions. [2018-09-28 09:57:08,901 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1149 transitions. Word has length 22 [2018-09-28 09:57:08,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:57:08,901 INFO L480 AbstractCegarLoop]: Abstraction has 818 states and 1149 transitions. [2018-09-28 09:57:08,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 09:57:08,902 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1149 transitions. [2018-09-28 09:57:08,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-28 09:57:08,903 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:57:08,903 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:57:08,903 INFO L423 AbstractCegarLoop]: === Iteration 34 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:57:08,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:57:08,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1613894486, now seen corresponding path program 1 times [2018-09-28 09:57:08,904 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:57:08,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:57:08,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:08,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:08,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:09,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:09,022 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:57:09,022 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:57:09,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:09,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:09,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:57:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:09,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:57:09,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2018-09-28 09:57:09,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 09:57:09,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 09:57:09,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2018-09-28 09:57:09,159 INFO L87 Difference]: Start difference. First operand 818 states and 1149 transitions. Second operand 15 states. [2018-09-28 09:57:10,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:57:10,868 INFO L93 Difference]: Finished difference Result 1057 states and 1481 transitions. [2018-09-28 09:57:10,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-28 09:57:10,868 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2018-09-28 09:57:10,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:57:10,872 INFO L225 Difference]: With dead ends: 1057 [2018-09-28 09:57:10,873 INFO L226 Difference]: Without dead ends: 1055 [2018-09-28 09:57:10,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2018-09-28 09:57:10,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2018-09-28 09:57:11,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 770. [2018-09-28 09:57:11,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 770 states. [2018-09-28 09:57:11,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1073 transitions. [2018-09-28 09:57:11,184 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1073 transitions. Word has length 22 [2018-09-28 09:57:11,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:57:11,185 INFO L480 AbstractCegarLoop]: Abstraction has 770 states and 1073 transitions. [2018-09-28 09:57:11,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 09:57:11,185 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1073 transitions. [2018-09-28 09:57:11,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-28 09:57:11,186 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:57:11,186 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:57:11,186 INFO L423 AbstractCegarLoop]: === Iteration 35 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:57:11,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:57:11,186 INFO L82 PathProgramCache]: Analyzing trace with hash -488650854, now seen corresponding path program 1 times [2018-09-28 09:57:11,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:57:11,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:57:11,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:11,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:11,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:11,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:12,089 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:57:12,089 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:57:12,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:12,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:12,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:57:12,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-28 09:57:12,933 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:57:12,934 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-28 09:57:12,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 09:57:12,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 09:57:12,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2018-09-28 09:57:12,934 INFO L87 Difference]: Start difference. First operand 770 states and 1073 transitions. Second operand 15 states. [2018-09-28 09:57:15,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:57:15,532 INFO L93 Difference]: Finished difference Result 1779 states and 2438 transitions. [2018-09-28 09:57:15,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-28 09:57:15,532 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2018-09-28 09:57:15,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:57:15,538 INFO L225 Difference]: With dead ends: 1779 [2018-09-28 09:57:15,538 INFO L226 Difference]: Without dead ends: 1507 [2018-09-28 09:57:15,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1037, Invalid=3655, Unknown=0, NotChecked=0, Total=4692 [2018-09-28 09:57:15,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2018-09-28 09:57:16,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1174. [2018-09-28 09:57:16,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1174 states. [2018-09-28 09:57:16,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1623 transitions. [2018-09-28 09:57:16,055 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1623 transitions. Word has length 25 [2018-09-28 09:57:16,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:57:16,055 INFO L480 AbstractCegarLoop]: Abstraction has 1174 states and 1623 transitions. [2018-09-28 09:57:16,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 09:57:16,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1623 transitions. [2018-09-28 09:57:16,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-28 09:57:16,057 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:57:16,057 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:57:16,057 INFO L423 AbstractCegarLoop]: === Iteration 36 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:57:16,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:57:16,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1608047085, now seen corresponding path program 1 times [2018-09-28 09:57:16,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:57:16,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:57:16,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:16,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:16,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:16,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:16,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:16,262 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:57:16,262 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:57:16,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:16,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:57:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-28 09:57:16,418 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:57:16,418 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-28 09:57:16,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 09:57:16,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 09:57:16,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2018-09-28 09:57:16,419 INFO L87 Difference]: Start difference. First operand 1174 states and 1623 transitions. Second operand 15 states. [2018-09-28 09:57:19,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:57:19,190 INFO L93 Difference]: Finished difference Result 2685 states and 3700 transitions. [2018-09-28 09:57:19,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-28 09:57:19,190 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2018-09-28 09:57:19,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:57:19,196 INFO L225 Difference]: With dead ends: 2685 [2018-09-28 09:57:19,196 INFO L226 Difference]: Without dead ends: 1652 [2018-09-28 09:57:19,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=782, Invalid=2758, Unknown=0, NotChecked=0, Total=3540 [2018-09-28 09:57:19,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2018-09-28 09:57:19,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1212. [2018-09-28 09:57:19,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1212 states. [2018-09-28 09:57:19,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1681 transitions. [2018-09-28 09:57:19,679 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1681 transitions. Word has length 25 [2018-09-28 09:57:19,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:57:19,680 INFO L480 AbstractCegarLoop]: Abstraction has 1212 states and 1681 transitions. [2018-09-28 09:57:19,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 09:57:19,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1681 transitions. [2018-09-28 09:57:19,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-28 09:57:19,681 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:57:19,681 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:57:19,682 INFO L423 AbstractCegarLoop]: === Iteration 37 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:57:19,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:57:19,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1101622072, now seen corresponding path program 1 times [2018-09-28 09:57:19,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:57:19,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:57:19,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:19,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:19,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:19,843 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:19,843 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:57:19,843 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:57:19,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:19,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:57:19,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-28 09:57:19,984 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:57:19,985 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-28 09:57:19,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 09:57:19,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 09:57:19,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2018-09-28 09:57:19,985 INFO L87 Difference]: Start difference. First operand 1212 states and 1681 transitions. Second operand 15 states. [2018-09-28 09:57:22,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:57:22,735 INFO L93 Difference]: Finished difference Result 2130 states and 2907 transitions. [2018-09-28 09:57:22,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-28 09:57:22,735 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2018-09-28 09:57:22,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:57:22,742 INFO L225 Difference]: With dead ends: 2130 [2018-09-28 09:57:22,742 INFO L226 Difference]: Without dead ends: 1946 [2018-09-28 09:57:22,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1010, Invalid=3546, Unknown=0, NotChecked=0, Total=4556 [2018-09-28 09:57:22,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2018-09-28 09:57:23,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1616. [2018-09-28 09:57:23,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1616 states. [2018-09-28 09:57:23,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 2248 transitions. [2018-09-28 09:57:23,388 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 2248 transitions. Word has length 25 [2018-09-28 09:57:23,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:57:23,388 INFO L480 AbstractCegarLoop]: Abstraction has 1616 states and 2248 transitions. [2018-09-28 09:57:23,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 09:57:23,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 2248 transitions. [2018-09-28 09:57:23,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-28 09:57:23,390 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:57:23,390 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:57:23,390 INFO L423 AbstractCegarLoop]: === Iteration 38 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:57:23,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:57:23,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1649781575, now seen corresponding path program 1 times [2018-09-28 09:57:23,391 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:57:23,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:57:23,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:23,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:23,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:23,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:23,572 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:57:23,572 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:57:23,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:23,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:57:23,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-28 09:57:23,710 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:57:23,710 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-28 09:57:23,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 09:57:23,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 09:57:23,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2018-09-28 09:57:23,711 INFO L87 Difference]: Start difference. First operand 1616 states and 2248 transitions. Second operand 15 states. [2018-09-28 09:57:26,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:57:26,756 INFO L93 Difference]: Finished difference Result 3372 states and 4705 transitions. [2018-09-28 09:57:26,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-28 09:57:26,756 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2018-09-28 09:57:26,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:57:26,765 INFO L225 Difference]: With dead ends: 3372 [2018-09-28 09:57:26,766 INFO L226 Difference]: Without dead ends: 2040 [2018-09-28 09:57:26,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=782, Invalid=2758, Unknown=0, NotChecked=0, Total=3540 [2018-09-28 09:57:26,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2018-09-28 09:57:27,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1575. [2018-09-28 09:57:27,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1575 states. [2018-09-28 09:57:27,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 2199 transitions. [2018-09-28 09:57:27,394 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 2199 transitions. Word has length 25 [2018-09-28 09:57:27,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:57:27,394 INFO L480 AbstractCegarLoop]: Abstraction has 1575 states and 2199 transitions. [2018-09-28 09:57:27,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 09:57:27,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 2199 transitions. [2018-09-28 09:57:27,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-28 09:57:27,396 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:57:27,396 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:57:27,396 INFO L423 AbstractCegarLoop]: === Iteration 39 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:57:27,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:57:27,396 INFO L82 PathProgramCache]: Analyzing trace with hash -664447164, now seen corresponding path program 2 times [2018-09-28 09:57:27,396 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:57:27,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:57:27,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:27,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:27,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:27,634 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:27,635 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:57:27,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:57:27,643 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 09:57:27,693 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 09:57:27,694 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:57:27,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:57:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:27,968 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:57:27,968 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-09-28 09:57:27,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-28 09:57:27,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-28 09:57:27,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2018-09-28 09:57:27,969 INFO L87 Difference]: Start difference. First operand 1575 states and 2199 transitions. Second operand 20 states. [2018-09-28 09:57:34,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:57:34,956 INFO L93 Difference]: Finished difference Result 2646 states and 3763 transitions. [2018-09-28 09:57:34,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-28 09:57:34,956 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2018-09-28 09:57:34,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:57:34,965 INFO L225 Difference]: With dead ends: 2646 [2018-09-28 09:57:34,965 INFO L226 Difference]: Without dead ends: 2644 [2018-09-28 09:57:34,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4956 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3132, Invalid=9524, Unknown=0, NotChecked=0, Total=12656 [2018-09-28 09:57:34,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2018-09-28 09:57:35,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 1833. [2018-09-28 09:57:35,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1833 states. [2018-09-28 09:57:35,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 2576 transitions. [2018-09-28 09:57:35,676 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 2576 transitions. Word has length 29 [2018-09-28 09:57:35,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:57:35,676 INFO L480 AbstractCegarLoop]: Abstraction has 1833 states and 2576 transitions. [2018-09-28 09:57:35,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-28 09:57:35,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 2576 transitions. [2018-09-28 09:57:35,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-28 09:57:35,678 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:57:35,678 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:57:35,679 INFO L423 AbstractCegarLoop]: === Iteration 40 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:57:35,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:57:35,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1030242552, now seen corresponding path program 2 times [2018-09-28 09:57:35,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:57:35,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:57:35,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:35,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:57:35,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:35,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:35,866 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:57:35,867 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:57:35,875 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 09:57:35,925 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 09:57:35,926 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:57:35,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:57:36,356 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:36,377 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:57:36,377 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2018-09-28 09:57:36,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-28 09:57:36,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-28 09:57:36,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2018-09-28 09:57:36,378 INFO L87 Difference]: Start difference. First operand 1833 states and 2576 transitions. Second operand 21 states. [2018-09-28 09:57:43,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:57:43,373 INFO L93 Difference]: Finished difference Result 2887 states and 4117 transitions. [2018-09-28 09:57:43,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-28 09:57:43,374 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2018-09-28 09:57:43,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:57:43,381 INFO L225 Difference]: With dead ends: 2887 [2018-09-28 09:57:43,381 INFO L226 Difference]: Without dead ends: 2885 [2018-09-28 09:57:43,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 5023 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3166, Invalid=9716, Unknown=0, NotChecked=0, Total=12882 [2018-09-28 09:57:43,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2018-09-28 09:57:44,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2102. [2018-09-28 09:57:44,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2102 states. [2018-09-28 09:57:44,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 2970 transitions. [2018-09-28 09:57:44,195 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 2970 transitions. Word has length 29 [2018-09-28 09:57:44,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:57:44,196 INFO L480 AbstractCegarLoop]: Abstraction has 2102 states and 2970 transitions. [2018-09-28 09:57:44,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-28 09:57:44,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 2970 transitions. [2018-09-28 09:57:44,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-28 09:57:44,198 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:57:44,198 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:57:44,198 INFO L423 AbstractCegarLoop]: === Iteration 41 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:57:44,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:57:44,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1174012687, now seen corresponding path program 2 times [2018-09-28 09:57:44,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:57:44,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:57:44,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:44,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:57:44,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:44,347 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-28 09:57:44,348 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:57:44,348 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:57:44,356 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 09:57:44,415 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 09:57:44,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:57:44,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:57:44,595 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-28 09:57:44,615 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:57:44,615 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2018-09-28 09:57:44,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-28 09:57:44,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-28 09:57:44,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2018-09-28 09:57:44,616 INFO L87 Difference]: Start difference. First operand 2102 states and 2970 transitions. Second operand 16 states. [2018-09-28 09:57:50,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:57:50,131 INFO L93 Difference]: Finished difference Result 6948 states and 9725 transitions. [2018-09-28 09:57:50,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-28 09:57:50,131 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2018-09-28 09:57:50,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:57:50,142 INFO L225 Difference]: With dead ends: 6948 [2018-09-28 09:57:50,142 INFO L226 Difference]: Without dead ends: 4896 [2018-09-28 09:57:50,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6484 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2880, Invalid=14150, Unknown=0, NotChecked=0, Total=17030 [2018-09-28 09:57:50,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4896 states. [2018-09-28 09:57:51,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4896 to 3634. [2018-09-28 09:57:51,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3634 states. [2018-09-28 09:57:51,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 5080 transitions. [2018-09-28 09:57:51,691 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 5080 transitions. Word has length 33 [2018-09-28 09:57:51,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:57:51,692 INFO L480 AbstractCegarLoop]: Abstraction has 3634 states and 5080 transitions. [2018-09-28 09:57:51,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-28 09:57:51,692 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 5080 transitions. [2018-09-28 09:57:51,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-28 09:57:51,695 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:57:51,695 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:57:51,695 INFO L423 AbstractCegarLoop]: === Iteration 42 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:57:51,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:57:51,696 INFO L82 PathProgramCache]: Analyzing trace with hash -2110003385, now seen corresponding path program 1 times [2018-09-28 09:57:51,696 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:57:51,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:57:51,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:51,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:57:51,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:57:51,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:57:51,871 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:57:51,871 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:57:51,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:57:51,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:57:51,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:57:52,040 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-28 09:57:52,061 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:57:52,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2018-09-28 09:57:52,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-28 09:57:52,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-28 09:57:52,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2018-09-28 09:57:52,062 INFO L87 Difference]: Start difference. First operand 3634 states and 5080 transitions. Second operand 18 states. [2018-09-28 09:57:58,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:57:58,842 INFO L93 Difference]: Finished difference Result 5436 states and 7576 transitions. [2018-09-28 09:57:58,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-28 09:57:58,842 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2018-09-28 09:57:58,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:57:58,856 INFO L225 Difference]: With dead ends: 5436 [2018-09-28 09:57:58,857 INFO L226 Difference]: Without dead ends: 5349 [2018-09-28 09:57:58,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2508 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1401, Invalid=6609, Unknown=0, NotChecked=0, Total=8010 [2018-09-28 09:57:58,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5349 states. [2018-09-28 09:58:00,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5349 to 4022. [2018-09-28 09:58:00,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4022 states. [2018-09-28 09:58:00,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4022 states to 4022 states and 5648 transitions. [2018-09-28 09:58:00,794 INFO L78 Accepts]: Start accepts. Automaton has 4022 states and 5648 transitions. Word has length 33 [2018-09-28 09:58:00,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:58:00,794 INFO L480 AbstractCegarLoop]: Abstraction has 4022 states and 5648 transitions. [2018-09-28 09:58:00,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-28 09:58:00,794 INFO L276 IsEmpty]: Start isEmpty. Operand 4022 states and 5648 transitions. [2018-09-28 09:58:00,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-28 09:58:00,797 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:58:00,797 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:58:00,798 INFO L423 AbstractCegarLoop]: === Iteration 43 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:58:00,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:58:00,798 INFO L82 PathProgramCache]: Analyzing trace with hash -895180230, now seen corresponding path program 3 times [2018-09-28 09:58:00,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:58:00,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:58:00,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:58:00,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:58:00,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:58:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:58:01,200 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:58:01,200 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:58:01,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:58:01,209 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 09:58:01,268 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-28 09:58:01,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:58:01,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:58:02,232 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-28 09:58:02,253 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:58:02,253 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2018-09-28 09:58:02,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-28 09:58:02,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-28 09:58:02,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2018-09-28 09:58:02,254 INFO L87 Difference]: Start difference. First operand 4022 states and 5648 transitions. Second operand 22 states. [2018-09-28 09:58:14,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:58:14,544 INFO L93 Difference]: Finished difference Result 8032 states and 11417 transitions. [2018-09-28 09:58:14,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-09-28 09:58:14,544 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 33 [2018-09-28 09:58:14,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:58:14,558 INFO L225 Difference]: With dead ends: 8032 [2018-09-28 09:58:14,558 INFO L226 Difference]: Without dead ends: 7935 [2018-09-28 09:58:14,563 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8181 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=4070, Invalid=17686, Unknown=0, NotChecked=0, Total=21756 [2018-09-28 09:58:14,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7935 states. [2018-09-28 09:58:16,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7935 to 4327. [2018-09-28 09:58:16,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4327 states. [2018-09-28 09:58:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4327 states to 4327 states and 6121 transitions. [2018-09-28 09:58:16,432 INFO L78 Accepts]: Start accepts. Automaton has 4327 states and 6121 transitions. Word has length 33 [2018-09-28 09:58:16,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:58:16,432 INFO L480 AbstractCegarLoop]: Abstraction has 4327 states and 6121 transitions. [2018-09-28 09:58:16,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-28 09:58:16,433 INFO L276 IsEmpty]: Start isEmpty. Operand 4327 states and 6121 transitions. [2018-09-28 09:58:16,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-28 09:58:16,436 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:58:16,436 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:58:16,437 INFO L423 AbstractCegarLoop]: === Iteration 44 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:58:16,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:58:16,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1250173630, now seen corresponding path program 1 times [2018-09-28 09:58:16,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:58:16,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:58:16,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:58:16,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:58:16,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:58:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:58:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-28 09:58:16,819 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:58:16,819 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:58:16,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:58:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:58:16,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:58:17,006 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-28 09:58:17,026 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:58:17,026 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2018-09-28 09:58:17,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-28 09:58:17,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-28 09:58:17,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2018-09-28 09:58:17,027 INFO L87 Difference]: Start difference. First operand 4327 states and 6121 transitions. Second operand 19 states. [2018-09-28 09:58:25,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:58:25,605 INFO L93 Difference]: Finished difference Result 9177 states and 12958 transitions. [2018-09-28 09:58:25,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-28 09:58:25,605 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2018-09-28 09:58:25,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:58:25,617 INFO L225 Difference]: With dead ends: 9177 [2018-09-28 09:58:25,617 INFO L226 Difference]: Without dead ends: 5991 [2018-09-28 09:58:25,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4514 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2969, Invalid=11311, Unknown=0, NotChecked=0, Total=14280 [2018-09-28 09:58:25,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5991 states. [2018-09-28 09:58:27,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5991 to 4147. [2018-09-28 09:58:27,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4147 states. [2018-09-28 09:58:27,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4147 states to 4147 states and 5817 transitions. [2018-09-28 09:58:27,428 INFO L78 Accepts]: Start accepts. Automaton has 4147 states and 5817 transitions. Word has length 33 [2018-09-28 09:58:27,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:58:27,428 INFO L480 AbstractCegarLoop]: Abstraction has 4147 states and 5817 transitions. [2018-09-28 09:58:27,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-28 09:58:27,429 INFO L276 IsEmpty]: Start isEmpty. Operand 4147 states and 5817 transitions. [2018-09-28 09:58:27,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-28 09:58:27,433 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:58:27,433 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:58:27,433 INFO L423 AbstractCegarLoop]: === Iteration 45 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:58:27,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:58:27,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1810158453, now seen corresponding path program 2 times [2018-09-28 09:58:27,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:58:27,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:58:27,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:58:27,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:58:27,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:58:27,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:58:27,917 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:58:27,917 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:58:27,917 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:58:27,925 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 09:58:27,990 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 09:58:27,991 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:58:27,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:58:28,132 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:58:28,153 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:58:28,154 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2018-09-28 09:58:28,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-28 09:58:28,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-28 09:58:28,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2018-09-28 09:58:28,154 INFO L87 Difference]: Start difference. First operand 4147 states and 5817 transitions. Second operand 18 states. [2018-09-28 09:58:33,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:58:33,803 INFO L93 Difference]: Finished difference Result 5255 states and 7327 transitions. [2018-09-28 09:58:33,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-28 09:58:33,804 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2018-09-28 09:58:33,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:58:33,812 INFO L225 Difference]: With dead ends: 5255 [2018-09-28 09:58:33,812 INFO L226 Difference]: Without dead ends: 5253 [2018-09-28 09:58:33,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=346, Invalid=1460, Unknown=0, NotChecked=0, Total=1806 [2018-09-28 09:58:33,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5253 states. [2018-09-28 09:58:35,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5253 to 4447. [2018-09-28 09:58:35,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4447 states. [2018-09-28 09:58:35,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4447 states to 4447 states and 6228 transitions. [2018-09-28 09:58:35,989 INFO L78 Accepts]: Start accepts. Automaton has 4447 states and 6228 transitions. Word has length 33 [2018-09-28 09:58:35,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:58:35,989 INFO L480 AbstractCegarLoop]: Abstraction has 4447 states and 6228 transitions. [2018-09-28 09:58:35,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-28 09:58:35,989 INFO L276 IsEmpty]: Start isEmpty. Operand 4447 states and 6228 transitions. [2018-09-28 09:58:35,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-28 09:58:35,993 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:58:35,993 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:58:35,993 INFO L423 AbstractCegarLoop]: === Iteration 46 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:58:35,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:58:35,993 INFO L82 PathProgramCache]: Analyzing trace with hash -667748710, now seen corresponding path program 1 times [2018-09-28 09:58:35,993 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:58:35,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:58:35,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:58:35,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:58:35,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:58:36,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:58:36,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:58:36,154 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:58:36,154 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:58:36,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:58:36,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:58:36,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:58:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-28 09:58:36,367 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:58:36,368 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2018-09-28 09:58:36,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-28 09:58:36,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-28 09:58:36,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2018-09-28 09:58:36,368 INFO L87 Difference]: Start difference. First operand 4447 states and 6228 transitions. Second operand 18 states. [2018-09-28 09:58:46,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:58:46,781 INFO L93 Difference]: Finished difference Result 7721 states and 10805 transitions. [2018-09-28 09:58:46,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-28 09:58:46,782 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2018-09-28 09:58:46,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:58:46,790 INFO L225 Difference]: With dead ends: 7721 [2018-09-28 09:58:46,791 INFO L226 Difference]: Without dead ends: 7719 [2018-09-28 09:58:46,793 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3331 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1278, Invalid=8228, Unknown=0, NotChecked=0, Total=9506 [2018-09-28 09:58:46,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7719 states. [2018-09-28 09:58:49,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7719 to 5438. [2018-09-28 09:58:49,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5438 states. [2018-09-28 09:58:49,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5438 states to 5438 states and 7651 transitions. [2018-09-28 09:58:49,330 INFO L78 Accepts]: Start accepts. Automaton has 5438 states and 7651 transitions. Word has length 33 [2018-09-28 09:58:49,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:58:49,331 INFO L480 AbstractCegarLoop]: Abstraction has 5438 states and 7651 transitions. [2018-09-28 09:58:49,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-28 09:58:49,331 INFO L276 IsEmpty]: Start isEmpty. Operand 5438 states and 7651 transitions. [2018-09-28 09:58:49,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-28 09:58:49,335 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:58:49,335 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:58:49,336 INFO L423 AbstractCegarLoop]: === Iteration 47 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:58:49,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:58:49,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1146614399, now seen corresponding path program 2 times [2018-09-28 09:58:49,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:58:49,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:58:49,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:58:49,337 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:58:49,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:58:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:58:49,460 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-28 09:58:49,461 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:58:49,461 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:58:49,469 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 09:58:49,529 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 09:58:49,529 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:58:49,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:58:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-28 09:58:49,747 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:58:49,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2018-09-28 09:58:49,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-28 09:58:49,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-28 09:58:49,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2018-09-28 09:58:49,748 INFO L87 Difference]: Start difference. First operand 5438 states and 7651 transitions. Second operand 16 states. [2018-09-28 09:58:53,322 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-09-28 09:58:53,734 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-09-28 09:58:59,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:58:59,431 INFO L93 Difference]: Finished difference Result 15976 states and 22278 transitions. [2018-09-28 09:58:59,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-28 09:58:59,431 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2018-09-28 09:58:59,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:58:59,446 INFO L225 Difference]: With dead ends: 15976 [2018-09-28 09:58:59,447 INFO L226 Difference]: Without dead ends: 10483 [2018-09-28 09:58:59,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6466 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2880, Invalid=14150, Unknown=0, NotChecked=0, Total=17030 [2018-09-28 09:58:59,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10483 states. [2018-09-28 09:59:03,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10483 to 8111. [2018-09-28 09:59:03,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8111 states. [2018-09-28 09:59:03,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8111 states to 8111 states and 11260 transitions. [2018-09-28 09:59:03,487 INFO L78 Accepts]: Start accepts. Automaton has 8111 states and 11260 transitions. Word has length 33 [2018-09-28 09:59:03,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:03,487 INFO L480 AbstractCegarLoop]: Abstraction has 8111 states and 11260 transitions. [2018-09-28 09:59:03,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-28 09:59:03,487 INFO L276 IsEmpty]: Start isEmpty. Operand 8111 states and 11260 transitions. [2018-09-28 09:59:03,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-28 09:59:03,492 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:03,492 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:59:03,492 INFO L423 AbstractCegarLoop]: === Iteration 48 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:03,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:03,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1449531796, now seen corresponding path program 1 times [2018-09-28 09:59:03,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:03,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:03,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:03,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:59:03,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:03,720 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:03,720 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:03,721 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:59:03,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:59:03,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:03,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:03,899 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-28 09:59:03,921 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:03,921 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2018-09-28 09:59:03,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-28 09:59:03,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-28 09:59:03,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2018-09-28 09:59:03,922 INFO L87 Difference]: Start difference. First operand 8111 states and 11260 transitions. Second operand 19 states. [2018-09-28 09:59:12,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:12,892 INFO L93 Difference]: Finished difference Result 10277 states and 14246 transitions. [2018-09-28 09:59:12,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-28 09:59:12,892 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2018-09-28 09:59:12,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:12,907 INFO L225 Difference]: With dead ends: 10277 [2018-09-28 09:59:12,907 INFO L226 Difference]: Without dead ends: 10275 [2018-09-28 09:59:12,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=978, Invalid=4424, Unknown=0, NotChecked=0, Total=5402 [2018-09-28 09:59:12,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10275 states. [2018-09-28 09:59:16,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10275 to 8291. [2018-09-28 09:59:16,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8291 states. [2018-09-28 09:59:16,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8291 states to 8291 states and 11531 transitions. [2018-09-28 09:59:16,971 INFO L78 Accepts]: Start accepts. Automaton has 8291 states and 11531 transitions. Word has length 33 [2018-09-28 09:59:16,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:16,972 INFO L480 AbstractCegarLoop]: Abstraction has 8291 states and 11531 transitions. [2018-09-28 09:59:16,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-28 09:59:16,972 INFO L276 IsEmpty]: Start isEmpty. Operand 8291 states and 11531 transitions. [2018-09-28 09:59:16,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-28 09:59:16,977 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:16,977 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:59:16,977 INFO L423 AbstractCegarLoop]: === Iteration 49 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:16,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:16,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1026480992, now seen corresponding path program 1 times [2018-09-28 09:59:16,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:16,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:16,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:16,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:59:16,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:17,182 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-28 09:59:17,182 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:17,182 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:59:17,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:59:17,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:17,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:17,349 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-28 09:59:17,371 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:17,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2018-09-28 09:59:17,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-28 09:59:17,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-28 09:59:17,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2018-09-28 09:59:17,372 INFO L87 Difference]: Start difference. First operand 8291 states and 11531 transitions. Second operand 19 states. [2018-09-28 09:59:27,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:27,930 INFO L93 Difference]: Finished difference Result 16294 states and 22694 transitions. [2018-09-28 09:59:27,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-28 09:59:27,931 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2018-09-28 09:59:27,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:27,942 INFO L225 Difference]: With dead ends: 16294 [2018-09-28 09:59:27,942 INFO L226 Difference]: Without dead ends: 9999 [2018-09-28 09:59:27,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4530 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2859, Invalid=11183, Unknown=0, NotChecked=0, Total=14042 [2018-09-28 09:59:27,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9999 states. [2018-09-28 09:59:32,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9999 to 8241. [2018-09-28 09:59:32,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8241 states. [2018-09-28 09:59:32,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8241 states to 8241 states and 11466 transitions. [2018-09-28 09:59:32,160 INFO L78 Accepts]: Start accepts. Automaton has 8241 states and 11466 transitions. Word has length 33 [2018-09-28 09:59:32,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:32,160 INFO L480 AbstractCegarLoop]: Abstraction has 8241 states and 11466 transitions. [2018-09-28 09:59:32,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-28 09:59:32,160 INFO L276 IsEmpty]: Start isEmpty. Operand 8241 states and 11466 transitions. [2018-09-28 09:59:32,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-28 09:59:32,165 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:32,165 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:59:32,165 INFO L423 AbstractCegarLoop]: === Iteration 50 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:32,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:32,165 INFO L82 PathProgramCache]: Analyzing trace with hash 610357864, now seen corresponding path program 3 times [2018-09-28 09:59:32,165 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:32,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:32,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:32,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:59:32,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:32,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:32,421 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:32,421 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:59:32,429 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 09:59:32,487 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-28 09:59:32,487 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:59:32,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:32,596 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-28 09:59:32,617 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:32,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 21 [2018-09-28 09:59:32,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-28 09:59:32,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-28 09:59:32,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2018-09-28 09:59:32,618 INFO L87 Difference]: Start difference. First operand 8241 states and 11466 transitions. Second operand 21 states. [2018-09-28 09:59:53,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:53,043 INFO L93 Difference]: Finished difference Result 25684 states and 35500 transitions. [2018-09-28 09:59:53,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2018-09-28 09:59:53,043 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 33 [2018-09-28 09:59:53,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:53,064 INFO L225 Difference]: With dead ends: 25684 [2018-09-28 09:59:53,064 INFO L226 Difference]: Without dead ends: 16698 [2018-09-28 09:59:53,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18096 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=6678, Invalid=35142, Unknown=0, NotChecked=0, Total=41820 [2018-09-28 09:59:53,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16698 states. [2018-09-28 09:59:58,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16698 to 10011. [2018-09-28 09:59:58,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10011 states. [2018-09-28 09:59:58,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10011 states to 10011 states and 13930 transitions. [2018-09-28 09:59:58,270 INFO L78 Accepts]: Start accepts. Automaton has 10011 states and 13930 transitions. Word has length 33 [2018-09-28 09:59:58,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:58,270 INFO L480 AbstractCegarLoop]: Abstraction has 10011 states and 13930 transitions. [2018-09-28 09:59:58,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-28 09:59:58,270 INFO L276 IsEmpty]: Start isEmpty. Operand 10011 states and 13930 transitions. [2018-09-28 09:59:58,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-28 09:59:58,275 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:58,275 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:59:58,275 INFO L423 AbstractCegarLoop]: === Iteration 51 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:58,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:58,275 INFO L82 PathProgramCache]: Analyzing trace with hash 690693469, now seen corresponding path program 1 times [2018-09-28 09:59:58,275 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:58,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:58,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:58,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:59:58,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:58,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:58,689 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:58,689 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:58,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 09:59:58,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:59:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:58,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:58,925 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-28 09:59:58,946 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:58,946 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2018-09-28 09:59:58,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-28 09:59:58,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-28 09:59:58,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2018-09-28 09:59:58,947 INFO L87 Difference]: Start difference. First operand 10011 states and 13930 transitions. Second operand 21 states. [2018-09-28 10:00:11,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:11,525 INFO L93 Difference]: Finished difference Result 12668 states and 17557 transitions. [2018-09-28 10:00:11,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-28 10:00:11,526 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 33 [2018-09-28 10:00:11,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:11,542 INFO L225 Difference]: With dead ends: 12668 [2018-09-28 10:00:11,543 INFO L226 Difference]: Without dead ends: 12586 [2018-09-28 10:00:11,546 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2220 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=841, Invalid=6131, Unknown=0, NotChecked=0, Total=6972 [2018-09-28 10:00:11,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12586 states. Received shutdown request... [2018-09-28 10:00:16,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12586 to 10468. [2018-09-28 10:00:16,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10468 states. [2018-09-28 10:00:16,828 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-28 10:00:17,417 WARN L206 ceAbstractionStarter]: Timeout [2018-09-28 10:00:17,418 INFO L202 PluginConnector]: Adding new model threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.09 10:00:17 BoogieIcfgContainer [2018-09-28 10:00:17,418 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-28 10:00:17,419 INFO L168 Benchmark]: Toolchain (without parser) took 254504.74 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: -2.4 GB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-09-28 10:00:17,420 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:00:17,421 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.02 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:00:17,421 INFO L168 Benchmark]: Boogie Preprocessor took 36.51 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:00:17,421 INFO L168 Benchmark]: RCFGBuilder took 637.39 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-28 10:00:17,422 INFO L168 Benchmark]: TraceAbstraction took 253774.09 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: -2.4 GB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-09-28 10:00:17,425 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 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 50.02 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 36.51 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 637.39 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 253774.09 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: -2.4 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: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 66). Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 99). Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 112]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 112). Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 121]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 121). Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 48 locations, 4 error locations. TIMEOUT Result, 253.7s OverallTime, 51 OverallIterations, 4 TraceHistogramMax, 186.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3758 SDtfs, 10438 SDslu, 7427 SDs, 0 SdLazy, 52271 SolverSat, 14023 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 53.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3857 GetRequests, 1041 SyntacticMatches, 11 SemanticMatches, 2805 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 85743 ImplicationChecksByTransitivity, 73.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10011occurred in iteration=50, 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: 43.1s AutomataMinimizationTime, 51 MinimizatonAttempts, 32101 StatesRemovedByMinimization, 50 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 18.7s InterpolantComputationTime, 2108 NumberOfCodeBlocks, 2108 NumberOfCodeBlocksAsserted, 108 NumberOfCheckSat, 2009 ConstructedInterpolants, 32 QuantifiedInterpolants, 222893 SizeOfPredicates, 797 NumberOfNonLiveVariables, 14213 ConjunctsInSsa, 1503 ConjunctsInUnsatCore, 99 InterpolantComputations, 9 PerfectInterpolantSequences, 199/778 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_WithProcedures.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-28_10-00-17-435.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/threadpooling_product_WithProcedures.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-28_10-00-17-435.csv Completed graceful shutdown