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 0.1.23-4eac566 [2018-09-23 19:31:24,779 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 19:31:24,781 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 19:31:24,796 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 19:31:24,796 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 19:31:24,798 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 19:31:24,799 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 19:31:24,801 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 19:31:24,802 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 19:31:24,804 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 19:31:24,804 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-23 19:31:24,805 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-23 19:31:24,806 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-23 19:31:24,807 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-23 19:31:24,810 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-23 19:31:24,811 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-23 19:31:24,812 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-23 19:31:24,819 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-23 19:31:24,821 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-23 19:31:24,826 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-23 19:31:24,827 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-23 19:31:24,830 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-23 19:31:24,832 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-23 19:31:24,835 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-23 19:31:24,836 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-23 19:31:24,837 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-23 19:31:24,838 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-23 19:31:24,839 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-23 19:31:24,839 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-23 19:31:24,840 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-23 19:31:24,840 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-23 19:31:24,841 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-23 19:31:24,841 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-23 19:31:24,841 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-23 19:31:24,842 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-23 19:31:24,843 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-23 19:31:24,843 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 19:31:24,865 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 19:31:24,865 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 19:31:24,866 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 19:31:24,866 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 19:31:24,867 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 19:31:24,867 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 19:31:24,867 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 19:31:24,867 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 19:31:24,869 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 19:31:24,869 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 19:31:24,870 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 19:31:24,870 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 19:31:24,870 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 19:31:24,870 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 19:31:24,870 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 19:31:24,871 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 19:31:24,871 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 19:31:24,871 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 19:31:24,871 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 19:31:24,871 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 19:31:24,872 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 19:31:24,872 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 19:31:24,872 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:31:24,872 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 19:31:24,874 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 19:31:24,874 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 19:31:24,874 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 19:31:24,874 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 19:31:24,874 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 19:31:24,875 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 19:31:24,924 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 19:31:24,939 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 19:31:24,943 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 19:31:24,945 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 19:31:24,945 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 19:31:24,946 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/threadpooling_product_WithProcedures.bpl [2018-09-23 19:31:24,946 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/threadpooling_product_WithProcedures.bpl' [2018-09-23 19:31:25,001 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 19:31:25,008 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 19:31:25,009 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 19:31:25,009 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 19:31:25,010 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 19:31:25,029 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 23.09 07:31:24" (1/1) ... [2018-09-23 19:31:25,043 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 23.09 07:31:24" (1/1) ... [2018-09-23 19:31:25,052 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 19:31:25,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 19:31:25,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 19:31:25,053 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 19:31:25,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:31:24" (1/1) ... [2018-09-23 19:31:25,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:31:24" (1/1) ... [2018-09-23 19:31:25,066 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:31:24" (1/1) ... [2018-09-23 19:31:25,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:31:24" (1/1) ... [2018-09-23 19:31:25,071 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:31:24" (1/1) ... [2018-09-23 19:31:25,074 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:31:24" (1/1) ... [2018-09-23 19:31:25,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:31:24" (1/1) ... [2018-09-23 19:31:25,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 19:31:25,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 19:31:25,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 19:31:25,078 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 19:31:25,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:31:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:31:25,148 INFO L130 BoogieDeclarations]: Found specification of procedure l1l0 [2018-09-23 19:31:25,149 INFO L138 BoogieDeclarations]: Found implementation of procedure l1l0 [2018-09-23 19:31:25,149 INFO L130 BoogieDeclarations]: Found specification of procedure l0l1 [2018-09-23 19:31:25,149 INFO L138 BoogieDeclarations]: Found implementation of procedure l0l1 [2018-09-23 19:31:25,149 INFO L130 BoogieDeclarations]: Found specification of procedure l0l0 [2018-09-23 19:31:25,150 INFO L138 BoogieDeclarations]: Found implementation of procedure l0l0 [2018-09-23 19:31:25,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-23 19:31:25,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-23 19:31:25,150 INFO L130 BoogieDeclarations]: Found specification of procedure l1l1 [2018-09-23 19:31:25,150 INFO L138 BoogieDeclarations]: Found implementation of procedure l1l1 [2018-09-23 19:31:25,685 INFO L354 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-23 19:31:25,686 INFO L202 PluginConnector]: Adding new model threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:31:25 BoogieIcfgContainer [2018-09-23 19:31:25,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 19:31:25,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 19:31:25,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 19:31:25,691 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 19:31:25,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:31:24" (1/2) ... [2018-09-23 19:31:25,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56de3023 and model type threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 07:31:25, skipping insertion in model container [2018-09-23 19:31:25,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:31:25" (2/2) ... [2018-09-23 19:31:25,694 INFO L112 eAbstractionObserver]: Analyzing ICFG threadpooling_product_WithProcedures.bpl [2018-09-23 19:31:25,704 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 19:31:25,713 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-09-23 19:31:25,757 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 19:31:25,757 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 19:31:25,758 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 19:31:25,758 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 19:31:25,758 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 19:31:25,758 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 19:31:25,758 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 19:31:25,758 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 19:31:25,759 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 19:31:25,779 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2018-09-23 19:31:25,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 19:31:25,785 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:25,786 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:25,788 INFO L423 AbstractCegarLoop]: === Iteration 1 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:25,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:25,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1282157605, now seen corresponding path program 1 times [2018-09-23 19:31:25,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:25,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:25,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:25,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:25,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:26,049 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:31:26,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-23 19:31:26,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 19:31:26,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 19:31:26,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:31:26,068 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 6 states. [2018-09-23 19:31:26,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:26,857 INFO L93 Difference]: Finished difference Result 72 states and 100 transitions. [2018-09-23 19:31:26,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:31:26,859 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2018-09-23 19:31:26,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:26,872 INFO L225 Difference]: With dead ends: 72 [2018-09-23 19:31:26,872 INFO L226 Difference]: Without dead ends: 70 [2018-09-23 19:31:26,876 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 [2018-09-23 19:31:26,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-23 19:31:26,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 48. [2018-09-23 19:31:26,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-23 19:31:26,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2018-09-23 19:31:26,934 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 7 [2018-09-23 19:31:26,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:26,934 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2018-09-23 19:31:26,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 19:31:26,935 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2018-09-23 19:31:26,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 19:31:26,936 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:26,936 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:26,937 INFO L423 AbstractCegarLoop]: === Iteration 2 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:26,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:26,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1272619553, now seen corresponding path program 1 times [2018-09-23 19:31:26,938 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:26,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:26,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:26,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:26,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:27,072 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:31:27,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-23 19:31:27,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 19:31:27,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 19:31:27,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:31:27,076 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 6 states. [2018-09-23 19:31:27,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:27,809 INFO L93 Difference]: Finished difference Result 81 states and 113 transitions. [2018-09-23 19:31:27,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:31:27,813 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2018-09-23 19:31:27,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:27,815 INFO L225 Difference]: With dead ends: 81 [2018-09-23 19:31:27,815 INFO L226 Difference]: Without dead ends: 79 [2018-09-23 19:31:27,820 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 [2018-09-23 19:31:27,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-23 19:31:27,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 57. [2018-09-23 19:31:27,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-23 19:31:27,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 78 transitions. [2018-09-23 19:31:27,844 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 78 transitions. Word has length 7 [2018-09-23 19:31:27,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:27,847 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 78 transitions. [2018-09-23 19:31:27,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 19:31:27,847 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 78 transitions. [2018-09-23 19:31:27,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 19:31:27,849 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:27,849 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:27,849 INFO L423 AbstractCegarLoop]: === Iteration 3 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:27,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:27,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1601446133, now seen corresponding path program 1 times [2018-09-23 19:31:27,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:27,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:27,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:27,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:27,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:28,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:28,004 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:31:28,004 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-23 19:31:28,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:31:28,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:31:28,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:31:28,006 INFO L87 Difference]: Start difference. First operand 57 states and 78 transitions. Second operand 7 states. [2018-09-23 19:31:28,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:28,818 INFO L93 Difference]: Finished difference Result 122 states and 175 transitions. [2018-09-23 19:31:28,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:31:28,820 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-09-23 19:31:28,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:28,823 INFO L225 Difference]: With dead ends: 122 [2018-09-23 19:31:28,823 INFO L226 Difference]: Without dead ends: 120 [2018-09-23 19:31:28,824 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 [2018-09-23 19:31:28,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-23 19:31:28,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 73. [2018-09-23 19:31:28,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-23 19:31:28,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 103 transitions. [2018-09-23 19:31:28,841 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 103 transitions. Word has length 10 [2018-09-23 19:31:28,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:28,841 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 103 transitions. [2018-09-23 19:31:28,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:31:28,841 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 103 transitions. [2018-09-23 19:31:28,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 19:31:28,843 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:28,843 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:28,843 INFO L423 AbstractCegarLoop]: === Iteration 4 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:28,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:28,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1152651256, now seen corresponding path program 1 times [2018-09-23 19:31:28,844 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:28,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:28,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:28,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:28,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:28,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:28,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:28,965 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:28,966 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:28,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:29,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:29,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:29,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:29,144 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:31:29,145 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2018-09-23 19:31:29,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:31:29,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:31:29,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:31:29,147 INFO L87 Difference]: Start difference. First operand 73 states and 103 transitions. Second operand 9 states. [2018-09-23 19:31:29,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:29,960 INFO L93 Difference]: Finished difference Result 168 states and 243 transitions. [2018-09-23 19:31:29,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:31:29,961 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2018-09-23 19:31:29,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:29,963 INFO L225 Difference]: With dead ends: 168 [2018-09-23 19:31:29,963 INFO L226 Difference]: Without dead ends: 121 [2018-09-23 19:31:29,966 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 [2018-09-23 19:31:29,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-23 19:31:29,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 97. [2018-09-23 19:31:29,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-23 19:31:29,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 136 transitions. [2018-09-23 19:31:29,987 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 136 transitions. Word has length 10 [2018-09-23 19:31:29,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:29,988 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 136 transitions. [2018-09-23 19:31:29,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:31:29,988 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 136 transitions. [2018-09-23 19:31:29,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:31:29,990 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:29,990 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:29,990 INFO L423 AbstractCegarLoop]: === Iteration 5 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:29,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:29,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1536370777, now seen corresponding path program 1 times [2018-09-23 19:31:29,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:29,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:29,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:29,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:29,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:30,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:30,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:30,080 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:30,081 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:30,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:30,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:30,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:30,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:30,382 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:30,383 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-23 19:31:30,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:31:30,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:31:30,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:31:30,384 INFO L87 Difference]: Start difference. First operand 97 states and 136 transitions. Second operand 10 states. [2018-09-23 19:31:31,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:31,059 INFO L93 Difference]: Finished difference Result 164 states and 232 transitions. [2018-09-23 19:31:31,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:31:31,059 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2018-09-23 19:31:31,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:31,062 INFO L225 Difference]: With dead ends: 164 [2018-09-23 19:31:31,062 INFO L226 Difference]: Without dead ends: 162 [2018-09-23 19:31:31,064 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 [2018-09-23 19:31:31,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-23 19:31:31,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 109. [2018-09-23 19:31:31,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-23 19:31:31,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 154 transitions. [2018-09-23 19:31:31,088 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 154 transitions. Word has length 11 [2018-09-23 19:31:31,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:31,088 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 154 transitions. [2018-09-23 19:31:31,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:31:31,088 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 154 transitions. [2018-09-23 19:31:31,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:31:31,090 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:31,090 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:31,091 INFO L423 AbstractCegarLoop]: === Iteration 6 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:31,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:31,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1150793287, now seen corresponding path program 1 times [2018-09-23 19:31:31,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:31,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:31,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:31,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:31,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:31,200 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:31,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:31,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:31,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:31,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:31,363 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:31,364 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-23 19:31:31,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:31:31,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:31:31,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:31:31,366 INFO L87 Difference]: Start difference. First operand 109 states and 154 transitions. Second operand 10 states. [2018-09-23 19:31:32,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:32,320 INFO L93 Difference]: Finished difference Result 181 states and 254 transitions. [2018-09-23 19:31:32,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:31:32,322 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2018-09-23 19:31:32,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:32,324 INFO L225 Difference]: With dead ends: 181 [2018-09-23 19:31:32,324 INFO L226 Difference]: Without dead ends: 179 [2018-09-23 19:31:32,325 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 [2018-09-23 19:31:32,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-23 19:31:32,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 117. [2018-09-23 19:31:32,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-23 19:31:32,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 164 transitions. [2018-09-23 19:31:32,350 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 164 transitions. Word has length 11 [2018-09-23 19:31:32,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:32,350 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 164 transitions. [2018-09-23 19:31:32,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:31:32,351 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 164 transitions. [2018-09-23 19:31:32,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:31:32,352 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:32,353 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:32,353 INFO L423 AbstractCegarLoop]: === Iteration 7 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:32,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:32,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1829652612, now seen corresponding path program 1 times [2018-09-23 19:31:32,354 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:32,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:32,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:32,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:32,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:32,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:32,489 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:32,489 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:32,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:32,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:32,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:32,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:32,995 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:31:32,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2018-09-23 19:31:32,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:31:32,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:31:32,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:31:32,996 INFO L87 Difference]: Start difference. First operand 117 states and 164 transitions. Second operand 9 states. [2018-09-23 19:31:34,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:34,125 INFO L93 Difference]: Finished difference Result 217 states and 304 transitions. [2018-09-23 19:31:34,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 19:31:34,127 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2018-09-23 19:31:34,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:34,128 INFO L225 Difference]: With dead ends: 217 [2018-09-23 19:31:34,128 INFO L226 Difference]: Without dead ends: 133 [2018-09-23 19:31:34,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=172, Invalid=380, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:31:34,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-23 19:31:34,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 119. [2018-09-23 19:31:34,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-23 19:31:34,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 160 transitions. [2018-09-23 19:31:34,151 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 160 transitions. Word has length 13 [2018-09-23 19:31:34,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:34,151 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 160 transitions. [2018-09-23 19:31:34,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:31:34,152 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 160 transitions. [2018-09-23 19:31:34,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 19:31:34,153 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:34,153 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:34,153 INFO L423 AbstractCegarLoop]: === Iteration 8 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:34,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:34,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1433054771, now seen corresponding path program 1 times [2018-09-23 19:31:34,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:34,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:34,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:34,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:34,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:34,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:34,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:34,261 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:34,261 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:34,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:34,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:34,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:34,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:34,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:34,515 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2018-09-23 19:31:34,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:31:34,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:31:34,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:31:34,516 INFO L87 Difference]: Start difference. First operand 119 states and 160 transitions. Second operand 13 states. [2018-09-23 19:31:36,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:36,098 INFO L93 Difference]: Finished difference Result 194 states and 266 transitions. [2018-09-23 19:31:36,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 19:31:36,099 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2018-09-23 19:31:36,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:36,101 INFO L225 Difference]: With dead ends: 194 [2018-09-23 19:31:36,101 INFO L226 Difference]: Without dead ends: 192 [2018-09-23 19:31:36,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:31:36,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-09-23 19:31:36,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 181. [2018-09-23 19:31:36,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-23 19:31:36,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 257 transitions. [2018-09-23 19:31:36,148 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 257 transitions. Word has length 14 [2018-09-23 19:31:36,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:36,148 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 257 transitions. [2018-09-23 19:31:36,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:31:36,149 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 257 transitions. [2018-09-23 19:31:36,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 19:31:36,150 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:36,150 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:36,156 INFO L423 AbstractCegarLoop]: === Iteration 9 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:36,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:36,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1436992942, now seen corresponding path program 1 times [2018-09-23 19:31:36,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:36,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:36,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:36,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:36,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:36,289 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:36,289 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:36,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:36,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:36,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:36,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:36,598 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:36,599 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2018-09-23 19:31:36,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:31:36,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:31:36,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:31:36,600 INFO L87 Difference]: Start difference. First operand 181 states and 257 transitions. Second operand 14 states. [2018-09-23 19:31:37,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:37,965 INFO L93 Difference]: Finished difference Result 246 states and 347 transitions. [2018-09-23 19:31:37,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 19:31:37,967 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-23 19:31:37,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:37,969 INFO L225 Difference]: With dead ends: 246 [2018-09-23 19:31:37,969 INFO L226 Difference]: Without dead ends: 244 [2018-09-23 19:31:37,971 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 [2018-09-23 19:31:37,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-09-23 19:31:38,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 193. [2018-09-23 19:31:38,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-23 19:31:38,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 274 transitions. [2018-09-23 19:31:38,007 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 274 transitions. Word has length 14 [2018-09-23 19:31:38,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:38,007 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 274 transitions. [2018-09-23 19:31:38,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:31:38,007 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 274 transitions. [2018-09-23 19:31:38,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 19:31:38,008 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:38,008 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:38,009 INFO L423 AbstractCegarLoop]: === Iteration 10 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:38,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:38,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1436993326, now seen corresponding path program 1 times [2018-09-23 19:31:38,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:38,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:38,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:38,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:38,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:38,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:38,103 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:38,103 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:38,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:38,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:38,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:38,287 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:38,288 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2018-09-23 19:31:38,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:31:38,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:31:38,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:31:38,289 INFO L87 Difference]: Start difference. First operand 193 states and 274 transitions. Second operand 14 states. [2018-09-23 19:31:40,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:40,441 INFO L93 Difference]: Finished difference Result 288 states and 406 transitions. [2018-09-23 19:31:40,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:31:40,444 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-23 19:31:40,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:40,446 INFO L225 Difference]: With dead ends: 288 [2018-09-23 19:31:40,446 INFO L226 Difference]: Without dead ends: 286 [2018-09-23 19:31:40,447 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 [2018-09-23 19:31:40,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2018-09-23 19:31:40,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 221. [2018-09-23 19:31:40,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-23 19:31:40,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 315 transitions. [2018-09-23 19:31:40,483 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 315 transitions. Word has length 14 [2018-09-23 19:31:40,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:40,483 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 315 transitions. [2018-09-23 19:31:40,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:31:40,483 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 315 transitions. [2018-09-23 19:31:40,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 19:31:40,484 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:40,484 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:40,485 INFO L423 AbstractCegarLoop]: === Iteration 11 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:40,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:40,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1791986342, now seen corresponding path program 1 times [2018-09-23 19:31:40,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:40,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:40,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:40,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:40,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:40,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:40,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:40,602 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:40,603 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:40,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:40,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:40,831 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:40,831 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2018-09-23 19:31:40,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:31:40,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:31:40,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:31:40,832 INFO L87 Difference]: Start difference. First operand 221 states and 315 transitions. Second operand 14 states. [2018-09-23 19:31:41,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:41,719 INFO L93 Difference]: Finished difference Result 314 states and 443 transitions. [2018-09-23 19:31:41,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:31:41,721 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-23 19:31:41,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:41,723 INFO L225 Difference]: With dead ends: 314 [2018-09-23 19:31:41,723 INFO L226 Difference]: Without dead ends: 312 [2018-09-23 19:31:41,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=307, Invalid=815, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:31:41,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2018-09-23 19:31:41,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 243. [2018-09-23 19:31:41,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-09-23 19:31:41,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 349 transitions. [2018-09-23 19:31:41,764 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 349 transitions. Word has length 14 [2018-09-23 19:31:41,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:41,764 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 349 transitions. [2018-09-23 19:31:41,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:31:41,765 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 349 transitions. [2018-09-23 19:31:41,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 19:31:41,765 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:41,766 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:41,766 INFO L423 AbstractCegarLoop]: === Iteration 12 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:41,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:41,766 INFO L82 PathProgramCache]: Analyzing trace with hash 844488035, now seen corresponding path program 1 times [2018-09-23 19:31:41,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:41,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:41,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:41,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:41,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:41,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:41,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:41,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:41,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:41,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:42,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:42,105 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:42,105 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2018-09-23 19:31:42,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:31:42,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:31:42,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:31:42,106 INFO L87 Difference]: Start difference. First operand 243 states and 349 transitions. Second operand 13 states. [2018-09-23 19:31:43,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:43,002 INFO L93 Difference]: Finished difference Result 322 states and 462 transitions. [2018-09-23 19:31:43,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 19:31:43,003 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2018-09-23 19:31:43,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:43,005 INFO L225 Difference]: With dead ends: 322 [2018-09-23 19:31:43,005 INFO L226 Difference]: Without dead ends: 320 [2018-09-23 19:31:43,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:31:43,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2018-09-23 19:31:43,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 302. [2018-09-23 19:31:43,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2018-09-23 19:31:43,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 444 transitions. [2018-09-23 19:31:43,060 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 444 transitions. Word has length 14 [2018-09-23 19:31:43,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:43,060 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 444 transitions. [2018-09-23 19:31:43,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:31:43,060 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 444 transitions. [2018-09-23 19:31:43,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 19:31:43,061 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:43,061 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:43,062 INFO L423 AbstractCegarLoop]: === Iteration 13 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:43,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:43,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1052420626, now seen corresponding path program 1 times [2018-09-23 19:31:43,062 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:43,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:43,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:43,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:43,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:43,148 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:43,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:43,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:43,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:43,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:43,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:43,300 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:43,300 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2018-09-23 19:31:43,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:31:43,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:31:43,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:31:43,301 INFO L87 Difference]: Start difference. First operand 302 states and 444 transitions. Second operand 14 states. [2018-09-23 19:31:44,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:44,661 INFO L93 Difference]: Finished difference Result 378 states and 544 transitions. [2018-09-23 19:31:44,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:31:44,663 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-23 19:31:44,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:44,668 INFO L225 Difference]: With dead ends: 378 [2018-09-23 19:31:44,668 INFO L226 Difference]: Without dead ends: 376 [2018-09-23 19:31:44,669 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 [2018-09-23 19:31:44,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2018-09-23 19:31:44,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 301. [2018-09-23 19:31:44,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2018-09-23 19:31:44,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 443 transitions. [2018-09-23 19:31:44,741 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 443 transitions. Word has length 14 [2018-09-23 19:31:44,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:44,741 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 443 transitions. [2018-09-23 19:31:44,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:31:44,741 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 443 transitions. [2018-09-23 19:31:44,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 19:31:44,742 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:44,743 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:44,743 INFO L423 AbstractCegarLoop]: === Iteration 14 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:44,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:44,743 INFO L82 PathProgramCache]: Analyzing trace with hash 697427610, now seen corresponding path program 1 times [2018-09-23 19:31:44,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:44,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:44,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:44,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:44,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:44,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:44,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:44,861 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:44,862 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:44,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:44,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:44,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:45,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:45,074 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:45,074 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 14 [2018-09-23 19:31:45,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:31:45,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:31:45,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:31:45,075 INFO L87 Difference]: Start difference. First operand 301 states and 443 transitions. Second operand 15 states. [2018-09-23 19:31:46,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:46,687 INFO L93 Difference]: Finished difference Result 395 states and 572 transitions. [2018-09-23 19:31:46,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:31:46,687 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-09-23 19:31:46,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:46,690 INFO L225 Difference]: With dead ends: 395 [2018-09-23 19:31:46,690 INFO L226 Difference]: Without dead ends: 393 [2018-09-23 19:31:46,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=347, Invalid=1135, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:31:46,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2018-09-23 19:31:46,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 312. [2018-09-23 19:31:46,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2018-09-23 19:31:46,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 459 transitions. [2018-09-23 19:31:46,751 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 459 transitions. Word has length 14 [2018-09-23 19:31:46,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:46,751 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 459 transitions. [2018-09-23 19:31:46,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:31:46,751 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 459 transitions. [2018-09-23 19:31:46,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 19:31:46,752 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:46,752 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:46,752 INFO L423 AbstractCegarLoop]: === Iteration 15 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:46,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:46,753 INFO L82 PathProgramCache]: Analyzing trace with hash 697427226, now seen corresponding path program 1 times [2018-09-23 19:31:46,753 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:46,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:46,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:46,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:46,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:46,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:46,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:46,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:46,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:46,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:46,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:46,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:47,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:47,059 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:47,059 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2018-09-23 19:31:47,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:31:47,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:31:47,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:31:47,060 INFO L87 Difference]: Start difference. First operand 312 states and 459 transitions. Second operand 13 states. [2018-09-23 19:31:47,978 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-09-23 19:31:49,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:49,124 INFO L93 Difference]: Finished difference Result 383 states and 560 transitions. [2018-09-23 19:31:49,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 19:31:49,124 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2018-09-23 19:31:49,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:49,126 INFO L225 Difference]: With dead ends: 383 [2018-09-23 19:31:49,126 INFO L226 Difference]: Without dead ends: 381 [2018-09-23 19:31:49,127 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 [2018-09-23 19:31:49,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2018-09-23 19:31:49,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 328. [2018-09-23 19:31:49,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-09-23 19:31:49,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 482 transitions. [2018-09-23 19:31:49,188 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 482 transitions. Word has length 14 [2018-09-23 19:31:49,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:49,188 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 482 transitions. [2018-09-23 19:31:49,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:31:49,188 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 482 transitions. [2018-09-23 19:31:49,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:31:49,189 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:49,189 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:49,189 INFO L423 AbstractCegarLoop]: === Iteration 16 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:49,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:49,190 INFO L82 PathProgramCache]: Analyzing trace with hash 406900684, now seen corresponding path program 1 times [2018-09-23 19:31:49,190 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:49,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:49,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:49,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:49,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:49,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:49,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:49,394 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:49,394 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:49,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:49,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:49,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:49,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:49,606 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:49,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2018-09-23 19:31:49,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:31:49,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:31:49,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:31:49,607 INFO L87 Difference]: Start difference. First operand 328 states and 482 transitions. Second operand 16 states. [2018-09-23 19:31:51,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:51,314 INFO L93 Difference]: Finished difference Result 429 states and 618 transitions. [2018-09-23 19:31:51,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 19:31:51,314 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2018-09-23 19:31:51,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:51,318 INFO L225 Difference]: With dead ends: 429 [2018-09-23 19:31:51,318 INFO L226 Difference]: Without dead ends: 427 [2018-09-23 19:31:51,319 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 [2018-09-23 19:31:51,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2018-09-23 19:31:51,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 242. [2018-09-23 19:31:51,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-09-23 19:31:51,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 351 transitions. [2018-09-23 19:31:51,388 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 351 transitions. Word has length 17 [2018-09-23 19:31:51,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:51,388 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 351 transitions. [2018-09-23 19:31:51,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:31:51,388 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 351 transitions. [2018-09-23 19:31:51,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:31:51,389 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:51,389 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:51,390 INFO L423 AbstractCegarLoop]: === Iteration 17 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:51,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:51,390 INFO L82 PathProgramCache]: Analyzing trace with hash 2143481530, now seen corresponding path program 1 times [2018-09-23 19:31:51,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:51,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:51,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:51,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:51,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:51,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:52,101 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:52,101 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:52,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:52,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:52,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:52,323 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:52,323 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2018-09-23 19:31:52,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:31:52,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:31:52,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:31:52,324 INFO L87 Difference]: Start difference. First operand 242 states and 351 transitions. Second operand 16 states. [2018-09-23 19:31:53,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:53,767 INFO L93 Difference]: Finished difference Result 330 states and 466 transitions. [2018-09-23 19:31:53,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 19:31:53,767 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2018-09-23 19:31:53,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:53,769 INFO L225 Difference]: With dead ends: 330 [2018-09-23 19:31:53,769 INFO L226 Difference]: Without dead ends: 328 [2018-09-23 19:31:53,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=579, Invalid=1401, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:31:53,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2018-09-23 19:31:53,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 158. [2018-09-23 19:31:53,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-23 19:31:53,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 226 transitions. [2018-09-23 19:31:53,830 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 226 transitions. Word has length 17 [2018-09-23 19:31:53,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:53,830 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 226 transitions. [2018-09-23 19:31:53,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:31:53,830 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 226 transitions. [2018-09-23 19:31:53,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:31:53,831 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:53,831 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:53,832 INFO L423 AbstractCegarLoop]: === Iteration 18 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:53,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:53,832 INFO L82 PathProgramCache]: Analyzing trace with hash -653821292, now seen corresponding path program 1 times [2018-09-23 19:31:53,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:53,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:53,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:53,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:53,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:54,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:54,163 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:54,164 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:54,175 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:54,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:54,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:54,280 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:54,280 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2018-09-23 19:31:54,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:31:54,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:31:54,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:31:54,281 INFO L87 Difference]: Start difference. First operand 158 states and 226 transitions. Second operand 12 states. [2018-09-23 19:31:54,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:54,811 INFO L93 Difference]: Finished difference Result 271 states and 380 transitions. [2018-09-23 19:31:54,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 19:31:54,819 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2018-09-23 19:31:54,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:54,820 INFO L225 Difference]: With dead ends: 271 [2018-09-23 19:31:54,820 INFO L226 Difference]: Without dead ends: 269 [2018-09-23 19:31:54,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:31:54,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-09-23 19:31:54,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 180. [2018-09-23 19:31:54,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-09-23 19:31:54,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 258 transitions. [2018-09-23 19:31:54,896 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 258 transitions. Word has length 18 [2018-09-23 19:31:54,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:54,897 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 258 transitions. [2018-09-23 19:31:54,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:31:54,897 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 258 transitions. [2018-09-23 19:31:54,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:31:54,898 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:54,898 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:54,898 INFO L423 AbstractCegarLoop]: === Iteration 19 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:54,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:54,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1014964826, now seen corresponding path program 1 times [2018-09-23 19:31:54,899 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:54,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:54,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:54,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:54,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:55,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:55,248 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:55,248 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) [2018-09-23 19:31:55,263 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 [2018-09-23 19:31:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:55,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:55,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:55,395 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:31:55,395 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2018-09-23 19:31:55,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:31:55,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:31:55,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:31:55,396 INFO L87 Difference]: Start difference. First operand 180 states and 258 transitions. Second operand 13 states. [2018-09-23 19:31:57,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:57,926 INFO L93 Difference]: Finished difference Result 741 states and 1047 transitions. [2018-09-23 19:31:57,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-23 19:31:57,927 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-23 19:31:57,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:57,929 INFO L225 Difference]: With dead ends: 741 [2018-09-23 19:31:57,929 INFO L226 Difference]: Without dead ends: 564 [2018-09-23 19:31:57,933 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 [2018-09-23 19:31:57,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2018-09-23 19:31:58,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 341. [2018-09-23 19:31:58,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-09-23 19:31:58,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 486 transitions. [2018-09-23 19:31:58,072 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 486 transitions. Word has length 18 [2018-09-23 19:31:58,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:58,072 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 486 transitions. [2018-09-23 19:31:58,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:31:58,072 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 486 transitions. [2018-09-23 19:31:58,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:31:58,073 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:58,073 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:58,074 INFO L423 AbstractCegarLoop]: === Iteration 20 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:58,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:58,074 INFO L82 PathProgramCache]: Analyzing trace with hash -155045024, now seen corresponding path program 1 times [2018-09-23 19:31:58,075 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:58,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:58,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:58,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:58,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:58,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:58,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:58,170 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:58,170 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:58,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:58,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:58,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:58,326 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:58,326 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2018-09-23 19:31:58,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:31:58,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:31:58,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:31:58,327 INFO L87 Difference]: Start difference. First operand 341 states and 486 transitions. Second operand 13 states. [2018-09-23 19:32:00,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:00,052 INFO L93 Difference]: Finished difference Result 809 states and 1155 transitions. [2018-09-23 19:32:00,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 19:32:00,057 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-23 19:32:00,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:00,060 INFO L225 Difference]: With dead ends: 809 [2018-09-23 19:32:00,060 INFO L226 Difference]: Without dead ends: 470 [2018-09-23 19:32:00,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=462, Invalid=1518, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:32:00,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2018-09-23 19:32:00,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 368. [2018-09-23 19:32:00,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2018-09-23 19:32:00,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 523 transitions. [2018-09-23 19:32:00,232 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 523 transitions. Word has length 18 [2018-09-23 19:32:00,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:00,232 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 523 transitions. [2018-09-23 19:32:00,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:32:00,232 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 523 transitions. [2018-09-23 19:32:00,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:32:00,233 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:00,234 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:00,234 INFO L423 AbstractCegarLoop]: === Iteration 21 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:00,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:00,234 INFO L82 PathProgramCache]: Analyzing trace with hash 393788879, now seen corresponding path program 1 times [2018-09-23 19:32:00,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:00,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:00,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:00,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:00,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:00,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:00,364 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:00,364 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:00,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:00,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:00,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:00,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:00,521 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:00,522 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-23 19:32:00,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:32:00,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:32:00,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:32:00,522 INFO L87 Difference]: Start difference. First operand 368 states and 523 transitions. Second operand 13 states. [2018-09-23 19:32:02,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:02,362 INFO L93 Difference]: Finished difference Result 1106 states and 1568 transitions. [2018-09-23 19:32:02,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 19:32:02,362 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-23 19:32:02,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:02,366 INFO L225 Difference]: With dead ends: 1106 [2018-09-23 19:32:02,366 INFO L226 Difference]: Without dead ends: 724 [2018-09-23 19:32:02,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=678, Invalid=2628, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:32:02,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2018-09-23 19:32:02,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 519. [2018-09-23 19:32:02,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 519 states. [2018-09-23 19:32:02,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 739 transitions. [2018-09-23 19:32:02,559 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 739 transitions. Word has length 18 [2018-09-23 19:32:02,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:02,559 INFO L480 AbstractCegarLoop]: Abstraction has 519 states and 739 transitions. [2018-09-23 19:32:02,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:32:02,559 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 739 transitions. [2018-09-23 19:32:02,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:32:02,560 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:02,561 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:02,561 INFO L423 AbstractCegarLoop]: === Iteration 22 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:02,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:02,561 INFO L82 PathProgramCache]: Analyzing trace with hash -216264799, now seen corresponding path program 1 times [2018-09-23 19:32:02,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:02,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:02,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:02,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:02,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:02,653 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:02,653 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:02,663 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:02,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:02,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:02,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:02,756 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:02,757 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2018-09-23 19:32:02,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:32:02,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:32:02,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:32:02,757 INFO L87 Difference]: Start difference. First operand 519 states and 739 transitions. Second operand 11 states. [2018-09-23 19:32:03,612 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-23 19:32:04,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:04,287 INFO L93 Difference]: Finished difference Result 711 states and 1002 transitions. [2018-09-23 19:32:04,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:32:04,294 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2018-09-23 19:32:04,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:04,297 INFO L225 Difference]: With dead ends: 711 [2018-09-23 19:32:04,297 INFO L226 Difference]: Without dead ends: 709 [2018-09-23 19:32:04,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:32:04,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2018-09-23 19:32:04,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 498. [2018-09-23 19:32:04,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498 states. [2018-09-23 19:32:04,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 704 transitions. [2018-09-23 19:32:04,484 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 704 transitions. Word has length 18 [2018-09-23 19:32:04,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:04,485 INFO L480 AbstractCegarLoop]: Abstraction has 498 states and 704 transitions. [2018-09-23 19:32:04,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:32:04,485 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 704 transitions. [2018-09-23 19:32:04,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:32:04,486 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:04,486 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:04,487 INFO L423 AbstractCegarLoop]: === Iteration 23 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:04,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:04,487 INFO L82 PathProgramCache]: Analyzing trace with hash 983482113, now seen corresponding path program 1 times [2018-09-23 19:32:04,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:04,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:04,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:04,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:04,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:04,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:04,778 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:04,778 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:04,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:04,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:04,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:04,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:04,898 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:32:04,898 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 13 [2018-09-23 19:32:04,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:32:04,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:32:04,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:32:04,899 INFO L87 Difference]: Start difference. First operand 498 states and 704 transitions. Second operand 13 states. [2018-09-23 19:32:05,881 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-23 19:32:06,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:06,724 INFO L93 Difference]: Finished difference Result 1319 states and 1864 transitions. [2018-09-23 19:32:06,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 19:32:06,725 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-23 19:32:06,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:06,728 INFO L225 Difference]: With dead ends: 1319 [2018-09-23 19:32:06,728 INFO L226 Difference]: Without dead ends: 823 [2018-09-23 19:32:06,730 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=477, Invalid=1415, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:32:06,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2018-09-23 19:32:06,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 566. [2018-09-23 19:32:06,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2018-09-23 19:32:06,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 809 transitions. [2018-09-23 19:32:06,970 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 809 transitions. Word has length 18 [2018-09-23 19:32:06,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:06,970 INFO L480 AbstractCegarLoop]: Abstraction has 566 states and 809 transitions. [2018-09-23 19:32:06,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:32:06,971 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 809 transitions. [2018-09-23 19:32:06,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:32:06,972 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:06,973 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:06,973 INFO L423 AbstractCegarLoop]: === Iteration 24 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:06,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:06,973 INFO L82 PathProgramCache]: Analyzing trace with hash 801556786, now seen corresponding path program 1 times [2018-09-23 19:32:06,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:06,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:06,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:06,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:06,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:06,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:07,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:07,405 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:07,405 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:07,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:07,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:07,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:07,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:07,563 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:07,564 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2018-09-23 19:32:07,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:32:07,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:32:07,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:32:07,564 INFO L87 Difference]: Start difference. First operand 566 states and 809 transitions. Second operand 12 states. [2018-09-23 19:32:08,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:08,324 INFO L93 Difference]: Finished difference Result 766 states and 1086 transitions. [2018-09-23 19:32:08,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 19:32:08,329 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2018-09-23 19:32:08,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:08,332 INFO L225 Difference]: With dead ends: 766 [2018-09-23 19:32:08,332 INFO L226 Difference]: Without dead ends: 764 [2018-09-23 19:32:08,333 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:32:08,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2018-09-23 19:32:08,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 608. [2018-09-23 19:32:08,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608 states. [2018-09-23 19:32:08,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 869 transitions. [2018-09-23 19:32:08,523 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 869 transitions. Word has length 18 [2018-09-23 19:32:08,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:08,523 INFO L480 AbstractCegarLoop]: Abstraction has 608 states and 869 transitions. [2018-09-23 19:32:08,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:32:08,523 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 869 transitions. [2018-09-23 19:32:08,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:32:08,524 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:08,524 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:08,524 INFO L423 AbstractCegarLoop]: === Iteration 25 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:08,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:08,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1593301430, now seen corresponding path program 1 times [2018-09-23 19:32:08,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:08,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:08,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:08,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:08,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:08,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:08,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:08,929 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:08,929 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:08,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:08,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:09,229 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:32:09,230 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2018-09-23 19:32:09,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:32:09,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:32:09,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:32:09,230 INFO L87 Difference]: Start difference. First operand 608 states and 869 transitions. Second operand 13 states. [2018-09-23 19:32:12,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:12,075 INFO L93 Difference]: Finished difference Result 2095 states and 2968 transitions. [2018-09-23 19:32:12,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-23 19:32:12,075 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-23 19:32:12,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:12,080 INFO L225 Difference]: With dead ends: 2095 [2018-09-23 19:32:12,080 INFO L226 Difference]: Without dead ends: 1329 [2018-09-23 19:32:12,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2559 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1290, Invalid=6192, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 19:32:12,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2018-09-23 19:32:12,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 992. [2018-09-23 19:32:12,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2018-09-23 19:32:12,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1402 transitions. [2018-09-23 19:32:12,418 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1402 transitions. Word has length 18 [2018-09-23 19:32:12,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:12,418 INFO L480 AbstractCegarLoop]: Abstraction has 992 states and 1402 transitions. [2018-09-23 19:32:12,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:32:12,418 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1402 transitions. [2018-09-23 19:32:12,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:32:12,419 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:12,419 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:12,420 INFO L423 AbstractCegarLoop]: === Iteration 26 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:12,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:12,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1366841759, now seen corresponding path program 1 times [2018-09-23 19:32:12,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:12,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:12,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:12,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:12,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:12,501 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:12,501 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:12,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:12,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:12,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:12,607 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:12,607 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2018-09-23 19:32:12,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:32:12,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:32:12,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:32:12,608 INFO L87 Difference]: Start difference. First operand 992 states and 1402 transitions. Second operand 11 states. [2018-09-23 19:32:13,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:13,825 INFO L93 Difference]: Finished difference Result 1291 states and 1819 transitions. [2018-09-23 19:32:13,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:32:13,826 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2018-09-23 19:32:13,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:13,832 INFO L225 Difference]: With dead ends: 1291 [2018-09-23 19:32:13,832 INFO L226 Difference]: Without dead ends: 1289 [2018-09-23 19:32:13,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:32:13,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2018-09-23 19:32:14,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1028. [2018-09-23 19:32:14,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1028 states. [2018-09-23 19:32:14,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1454 transitions. [2018-09-23 19:32:14,203 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1454 transitions. Word has length 18 [2018-09-23 19:32:14,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:14,203 INFO L480 AbstractCegarLoop]: Abstraction has 1028 states and 1454 transitions. [2018-09-23 19:32:14,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:32:14,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1454 transitions. [2018-09-23 19:32:14,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:32:14,205 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:14,205 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:14,205 INFO L423 AbstractCegarLoop]: === Iteration 27 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:14,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:14,205 INFO L82 PathProgramCache]: Analyzing trace with hash -817918193, now seen corresponding path program 1 times [2018-09-23 19:32:14,205 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:14,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:14,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:14,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:14,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:14,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:14,297 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:14,297 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:14,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:14,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:14,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:14,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:14,431 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:32:14,431 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 13 [2018-09-23 19:32:14,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:32:14,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:32:14,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:32:14,432 INFO L87 Difference]: Start difference. First operand 1028 states and 1454 transitions. Second operand 13 states. [2018-09-23 19:32:16,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:16,010 INFO L93 Difference]: Finished difference Result 2222 states and 3144 transitions. [2018-09-23 19:32:16,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 19:32:16,013 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-23 19:32:16,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:16,018 INFO L225 Difference]: With dead ends: 2222 [2018-09-23 19:32:16,018 INFO L226 Difference]: Without dead ends: 1132 [2018-09-23 19:32:16,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=477, Invalid=1415, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:32:16,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2018-09-23 19:32:16,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 831. [2018-09-23 19:32:16,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 831 states. [2018-09-23 19:32:16,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1173 transitions. [2018-09-23 19:32:16,317 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1173 transitions. Word has length 18 [2018-09-23 19:32:16,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:16,318 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 1173 transitions. [2018-09-23 19:32:16,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:32:16,318 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1173 transitions. [2018-09-23 19:32:16,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:32:16,319 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:16,319 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:16,319 INFO L423 AbstractCegarLoop]: === Iteration 28 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:16,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:16,320 INFO L82 PathProgramCache]: Analyzing trace with hash -228224959, now seen corresponding path program 1 times [2018-09-23 19:32:16,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:16,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:16,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:16,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:16,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:16,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:16,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:16,479 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:16,479 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:16,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:16,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:16,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:16,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:16,630 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:16,630 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-23 19:32:16,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:32:16,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:32:16,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:32:16,631 INFO L87 Difference]: Start difference. First operand 831 states and 1173 transitions. Second operand 13 states. [2018-09-23 19:32:18,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:18,566 INFO L93 Difference]: Finished difference Result 1989 states and 2785 transitions. [2018-09-23 19:32:18,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 19:32:18,566 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-23 19:32:18,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:18,571 INFO L225 Difference]: With dead ends: 1989 [2018-09-23 19:32:18,571 INFO L226 Difference]: Without dead ends: 1130 [2018-09-23 19:32:18,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=678, Invalid=2628, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:32:18,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2018-09-23 19:32:18,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 806. [2018-09-23 19:32:18,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 806 states. [2018-09-23 19:32:18,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1135 transitions. [2018-09-23 19:32:18,857 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1135 transitions. Word has length 18 [2018-09-23 19:32:18,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:18,857 INFO L480 AbstractCegarLoop]: Abstraction has 806 states and 1135 transitions. [2018-09-23 19:32:18,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:32:18,857 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1135 transitions. [2018-09-23 19:32:18,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 19:32:18,858 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:18,858 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] [2018-09-23 19:32:18,859 INFO L423 AbstractCegarLoop]: === Iteration 29 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:18,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:18,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1122647006, now seen corresponding path program 1 times [2018-09-23 19:32:18,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:18,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:18,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:18,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:18,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:18,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:19,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:19,041 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:19,041 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:19,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:19,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:19,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:19,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:19,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-09-23 19:32:19,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:32:19,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:32:19,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:32:19,159 INFO L87 Difference]: Start difference. First operand 806 states and 1135 transitions. Second operand 11 states. [2018-09-23 19:32:20,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:20,436 INFO L93 Difference]: Finished difference Result 1022 states and 1428 transitions. [2018-09-23 19:32:20,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:32:20,437 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2018-09-23 19:32:20,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:20,441 INFO L225 Difference]: With dead ends: 1022 [2018-09-23 19:32:20,441 INFO L226 Difference]: Without dead ends: 1020 [2018-09-23 19:32:20,442 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=203, Invalid=727, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:32:20,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2018-09-23 19:32:20,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 838. [2018-09-23 19:32:20,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 838 states. [2018-09-23 19:32:20,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1182 transitions. [2018-09-23 19:32:20,707 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1182 transitions. Word has length 22 [2018-09-23 19:32:20,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:20,708 INFO L480 AbstractCegarLoop]: Abstraction has 838 states and 1182 transitions. [2018-09-23 19:32:20,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:32:20,708 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1182 transitions. [2018-09-23 19:32:20,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 19:32:20,709 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:20,709 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] [2018-09-23 19:32:20,709 INFO L423 AbstractCegarLoop]: === Iteration 30 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:20,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:20,710 INFO L82 PathProgramCache]: Analyzing trace with hash 15880131, now seen corresponding path program 1 times [2018-09-23 19:32:20,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:20,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:20,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:20,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:20,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:20,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:21,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:21,098 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:21,098 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:21,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:21,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:21,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:21,511 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:21,511 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-09-23 19:32:21,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:32:21,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:32:21,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:32:21,512 INFO L87 Difference]: Start difference. First operand 838 states and 1182 transitions. Second operand 10 states. [2018-09-23 19:32:22,980 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-23 19:32:23,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:23,470 INFO L93 Difference]: Finished difference Result 1127 states and 1575 transitions. [2018-09-23 19:32:23,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:32:23,470 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2018-09-23 19:32:23,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:23,475 INFO L225 Difference]: With dead ends: 1127 [2018-09-23 19:32:23,475 INFO L226 Difference]: Without dead ends: 1125 [2018-09-23 19:32:23,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:32:23,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2018-09-23 19:32:23,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 852. [2018-09-23 19:32:23,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 852 states. [2018-09-23 19:32:23,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1203 transitions. [2018-09-23 19:32:23,817 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1203 transitions. Word has length 22 [2018-09-23 19:32:23,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:23,818 INFO L480 AbstractCegarLoop]: Abstraction has 852 states and 1203 transitions. [2018-09-23 19:32:23,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:32:23,818 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1203 transitions. [2018-09-23 19:32:23,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 19:32:23,819 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:23,819 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] [2018-09-23 19:32:23,820 INFO L423 AbstractCegarLoop]: === Iteration 31 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:23,820 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:23,820 INFO L82 PathProgramCache]: Analyzing trace with hash -510719313, now seen corresponding path program 1 times [2018-09-23 19:32:23,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:23,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:23,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:23,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:23,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:23,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:23,918 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:23,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:23,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:23,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:23,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:24,056 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:24,056 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-23 19:32:24,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:32:24,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:32:24,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:32:24,057 INFO L87 Difference]: Start difference. First operand 852 states and 1203 transitions. Second operand 14 states. [2018-09-23 19:32:25,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:25,674 INFO L93 Difference]: Finished difference Result 1127 states and 1578 transitions. [2018-09-23 19:32:25,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 19:32:25,675 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2018-09-23 19:32:25,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:25,680 INFO L225 Difference]: With dead ends: 1127 [2018-09-23 19:32:25,680 INFO L226 Difference]: Without dead ends: 1125 [2018-09-23 19:32:25,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=548, Invalid=1432, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:32:25,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2018-09-23 19:32:25,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 830. [2018-09-23 19:32:25,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 830 states. [2018-09-23 19:32:25,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1171 transitions. [2018-09-23 19:32:25,969 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1171 transitions. Word has length 22 [2018-09-23 19:32:25,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:25,970 INFO L480 AbstractCegarLoop]: Abstraction has 830 states and 1171 transitions. [2018-09-23 19:32:25,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:32:25,970 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1171 transitions. [2018-09-23 19:32:25,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 19:32:25,971 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:25,971 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:25,972 INFO L423 AbstractCegarLoop]: === Iteration 32 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:25,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:25,972 INFO L82 PathProgramCache]: Analyzing trace with hash 627807824, now seen corresponding path program 1 times [2018-09-23 19:32:25,972 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:25,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:25,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:25,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:25,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:25,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:26,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:26,136 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:26,136 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:26,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:26,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:26,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:26,317 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:26,317 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2018-09-23 19:32:26,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:32:26,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:32:26,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:32:26,318 INFO L87 Difference]: Start difference. First operand 830 states and 1171 transitions. Second operand 15 states. [2018-09-23 19:32:27,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:27,993 INFO L93 Difference]: Finished difference Result 1072 states and 1499 transitions. [2018-09-23 19:32:27,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 19:32:27,993 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2018-09-23 19:32:27,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:27,999 INFO L225 Difference]: With dead ends: 1072 [2018-09-23 19:32:27,999 INFO L226 Difference]: Without dead ends: 1070 [2018-09-23 19:32:28,000 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 [2018-09-23 19:32:28,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2018-09-23 19:32:28,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 788. [2018-09-23 19:32:28,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 788 states. [2018-09-23 19:32:28,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1104 transitions. [2018-09-23 19:32:28,322 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1104 transitions. Word has length 22 [2018-09-23 19:32:28,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:28,322 INFO L480 AbstractCegarLoop]: Abstraction has 788 states and 1104 transitions. [2018-09-23 19:32:28,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:32:28,322 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1104 transitions. [2018-09-23 19:32:28,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 19:32:28,323 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:28,324 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] [2018-09-23 19:32:28,324 INFO L423 AbstractCegarLoop]: === Iteration 33 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:28,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:28,324 INFO L82 PathProgramCache]: Analyzing trace with hash 345073063, now seen corresponding path program 1 times [2018-09-23 19:32:28,324 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:28,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:28,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:28,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:28,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:28,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:28,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:28,578 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:28,578 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:28,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:28,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:28,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:28,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:28,677 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:28,677 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-09-23 19:32:28,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:32:28,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:32:28,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:32:28,678 INFO L87 Difference]: Start difference. First operand 788 states and 1104 transitions. Second operand 10 states. [2018-09-23 19:32:30,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:30,003 INFO L93 Difference]: Finished difference Result 1025 states and 1426 transitions. [2018-09-23 19:32:30,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:32:30,004 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2018-09-23 19:32:30,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:30,007 INFO L225 Difference]: With dead ends: 1025 [2018-09-23 19:32:30,008 INFO L226 Difference]: Without dead ends: 1023 [2018-09-23 19:32:30,008 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 [2018-09-23 19:32:30,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2018-09-23 19:32:30,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 818. [2018-09-23 19:32:30,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 818 states. [2018-09-23 19:32:30,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1149 transitions. [2018-09-23 19:32:30,312 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1149 transitions. Word has length 22 [2018-09-23 19:32:30,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:30,313 INFO L480 AbstractCegarLoop]: Abstraction has 818 states and 1149 transitions. [2018-09-23 19:32:30,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:32:30,313 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1149 transitions. [2018-09-23 19:32:30,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 19:32:30,314 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:30,314 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:30,314 INFO L423 AbstractCegarLoop]: === Iteration 34 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:30,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:30,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1613894486, now seen corresponding path program 1 times [2018-09-23 19:32:30,315 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:30,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:30,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:30,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:30,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:30,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:30,437 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:30,437 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:30,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:30,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:30,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:30,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:30,576 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2018-09-23 19:32:30,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:32:30,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:32:30,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:32:30,576 INFO L87 Difference]: Start difference. First operand 818 states and 1149 transitions. Second operand 15 states. [2018-09-23 19:32:32,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:32,319 INFO L93 Difference]: Finished difference Result 1057 states and 1481 transitions. [2018-09-23 19:32:32,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 19:32:32,319 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2018-09-23 19:32:32,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:32,323 INFO L225 Difference]: With dead ends: 1057 [2018-09-23 19:32:32,323 INFO L226 Difference]: Without dead ends: 1055 [2018-09-23 19:32:32,324 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 [2018-09-23 19:32:32,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2018-09-23 19:32:32,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 770. [2018-09-23 19:32:32,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 770 states. [2018-09-23 19:32:32,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1073 transitions. [2018-09-23 19:32:32,679 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1073 transitions. Word has length 22 [2018-09-23 19:32:32,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:32,679 INFO L480 AbstractCegarLoop]: Abstraction has 770 states and 1073 transitions. [2018-09-23 19:32:32,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:32:32,679 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1073 transitions. [2018-09-23 19:32:32,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-23 19:32:32,680 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:32,680 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] [2018-09-23 19:32:32,681 INFO L423 AbstractCegarLoop]: === Iteration 35 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:32,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:32,681 INFO L82 PathProgramCache]: Analyzing trace with hash -488650854, now seen corresponding path program 1 times [2018-09-23 19:32:32,681 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:32,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:32,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:32,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:32,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:32,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:33,585 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:33,585 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:33,585 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:33,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:33,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 19:32:34,082 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:34,082 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-23 19:32:34,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:32:34,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:32:34,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:32:34,083 INFO L87 Difference]: Start difference. First operand 770 states and 1073 transitions. Second operand 15 states. [2018-09-23 19:32:36,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:36,636 INFO L93 Difference]: Finished difference Result 1779 states and 2438 transitions. [2018-09-23 19:32:36,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 19:32:36,636 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2018-09-23 19:32:36,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:36,641 INFO L225 Difference]: With dead ends: 1779 [2018-09-23 19:32:36,641 INFO L226 Difference]: Without dead ends: 1507 [2018-09-23 19:32:36,644 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1037, Invalid=3655, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 19:32:36,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2018-09-23 19:32:37,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1174. [2018-09-23 19:32:37,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1174 states. [2018-09-23 19:32:37,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1623 transitions. [2018-09-23 19:32:37,115 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1623 transitions. Word has length 25 [2018-09-23 19:32:37,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:37,115 INFO L480 AbstractCegarLoop]: Abstraction has 1174 states and 1623 transitions. [2018-09-23 19:32:37,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:32:37,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1623 transitions. [2018-09-23 19:32:37,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-23 19:32:37,116 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:37,116 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:37,116 INFO L423 AbstractCegarLoop]: === Iteration 36 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:37,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:37,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1608047085, now seen corresponding path program 1 times [2018-09-23 19:32:37,117 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:37,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:37,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:37,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:37,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:37,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:37,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:37,223 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:37,223 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:37,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:37,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:37,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:37,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 19:32:37,377 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:37,377 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-23 19:32:37,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:32:37,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:32:37,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:32:37,378 INFO L87 Difference]: Start difference. First operand 1174 states and 1623 transitions. Second operand 15 states. [2018-09-23 19:32:40,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:40,015 INFO L93 Difference]: Finished difference Result 2685 states and 3700 transitions. [2018-09-23 19:32:40,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 19:32:40,015 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2018-09-23 19:32:40,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:40,021 INFO L225 Difference]: With dead ends: 2685 [2018-09-23 19:32:40,021 INFO L226 Difference]: Without dead ends: 1652 [2018-09-23 19:32:40,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=2758, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:32:40,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2018-09-23 19:32:40,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1212. [2018-09-23 19:32:40,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1212 states. [2018-09-23 19:32:40,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1681 transitions. [2018-09-23 19:32:40,503 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1681 transitions. Word has length 25 [2018-09-23 19:32:40,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:40,503 INFO L480 AbstractCegarLoop]: Abstraction has 1212 states and 1681 transitions. [2018-09-23 19:32:40,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:32:40,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1681 transitions. [2018-09-23 19:32:40,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-23 19:32:40,505 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:40,505 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] [2018-09-23 19:32:40,505 INFO L423 AbstractCegarLoop]: === Iteration 37 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:40,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:40,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1101622072, now seen corresponding path program 1 times [2018-09-23 19:32:40,506 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:40,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:40,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:40,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:40,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:40,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:40,671 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:40,671 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:40,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:40,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:40,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:40,787 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 19:32:40,808 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:40,809 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-23 19:32:40,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:32:40,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:32:40,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:32:40,809 INFO L87 Difference]: Start difference. First operand 1212 states and 1681 transitions. Second operand 15 states. [2018-09-23 19:32:43,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:43,803 INFO L93 Difference]: Finished difference Result 2130 states and 2907 transitions. [2018-09-23 19:32:43,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 19:32:43,803 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2018-09-23 19:32:43,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:43,810 INFO L225 Difference]: With dead ends: 2130 [2018-09-23 19:32:43,810 INFO L226 Difference]: Without dead ends: 1946 [2018-09-23 19:32:43,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1010, Invalid=3546, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:32:43,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2018-09-23 19:32:44,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1616. [2018-09-23 19:32:44,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1616 states. [2018-09-23 19:32:44,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 2248 transitions. [2018-09-23 19:32:44,432 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 2248 transitions. Word has length 25 [2018-09-23 19:32:44,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:44,432 INFO L480 AbstractCegarLoop]: Abstraction has 1616 states and 2248 transitions. [2018-09-23 19:32:44,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:32:44,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 2248 transitions. [2018-09-23 19:32:44,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-23 19:32:44,434 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:44,434 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:44,435 INFO L423 AbstractCegarLoop]: === Iteration 38 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:44,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:44,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1649781575, now seen corresponding path program 1 times [2018-09-23 19:32:44,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:44,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:44,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:44,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:44,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:44,553 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:44,553 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:44,553 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:44,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:44,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:44,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:44,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 19:32:44,704 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:44,704 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-23 19:32:44,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:32:44,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:32:44,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:32:44,705 INFO L87 Difference]: Start difference. First operand 1616 states and 2248 transitions. Second operand 15 states. [2018-09-23 19:32:47,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:47,651 INFO L93 Difference]: Finished difference Result 3372 states and 4705 transitions. [2018-09-23 19:32:47,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 19:32:47,652 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2018-09-23 19:32:47,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:47,661 INFO L225 Difference]: With dead ends: 3372 [2018-09-23 19:32:47,662 INFO L226 Difference]: Without dead ends: 2040 [2018-09-23 19:32:47,667 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 [2018-09-23 19:32:47,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2018-09-23 19:32:48,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1575. [2018-09-23 19:32:48,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1575 states. [2018-09-23 19:32:48,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 2199 transitions. [2018-09-23 19:32:48,285 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 2199 transitions. Word has length 25 [2018-09-23 19:32:48,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:48,286 INFO L480 AbstractCegarLoop]: Abstraction has 1575 states and 2199 transitions. [2018-09-23 19:32:48,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:32:48,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 2199 transitions. [2018-09-23 19:32:48,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-23 19:32:48,288 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:48,288 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:48,288 INFO L423 AbstractCegarLoop]: === Iteration 39 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:48,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:48,289 INFO L82 PathProgramCache]: Analyzing trace with hash -664447164, now seen corresponding path program 2 times [2018-09-23 19:32:48,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:48,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:48,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:48,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:48,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:48,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:48,522 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:48,523 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:48,523 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:48,530 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:32:48,582 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:32:48,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:48,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:48,785 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:48,805 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:48,805 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-09-23 19:32:48,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 19:32:48,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 19:32:48,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:32:48,806 INFO L87 Difference]: Start difference. First operand 1575 states and 2199 transitions. Second operand 20 states. [2018-09-23 19:32:55,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:55,718 INFO L93 Difference]: Finished difference Result 2646 states and 3763 transitions. [2018-09-23 19:32:55,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-23 19:32:55,718 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2018-09-23 19:32:55,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:55,728 INFO L225 Difference]: With dead ends: 2646 [2018-09-23 19:32:55,728 INFO L226 Difference]: Without dead ends: 2644 [2018-09-23 19:32:55,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4956 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3132, Invalid=9524, Unknown=0, NotChecked=0, Total=12656 [2018-09-23 19:32:55,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2018-09-23 19:32:56,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 1833. [2018-09-23 19:32:56,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1833 states. [2018-09-23 19:32:56,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 2576 transitions. [2018-09-23 19:32:56,428 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 2576 transitions. Word has length 29 [2018-09-23 19:32:56,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:56,428 INFO L480 AbstractCegarLoop]: Abstraction has 1833 states and 2576 transitions. [2018-09-23 19:32:56,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 19:32:56,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 2576 transitions. [2018-09-23 19:32:56,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-23 19:32:56,430 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:56,430 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:56,430 INFO L423 AbstractCegarLoop]: === Iteration 40 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:56,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:56,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1030242552, now seen corresponding path program 2 times [2018-09-23 19:32:56,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:56,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:56,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:56,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:56,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:56,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:56,642 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:56,642 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:56,642 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:56,650 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:32:56,698 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:32:56,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:56,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:57,321 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:57,342 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:57,342 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2018-09-23 19:32:57,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 19:32:57,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 19:32:57,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:32:57,343 INFO L87 Difference]: Start difference. First operand 1833 states and 2576 transitions. Second operand 21 states. [2018-09-23 19:33:04,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:04,273 INFO L93 Difference]: Finished difference Result 2887 states and 4117 transitions. [2018-09-23 19:33:04,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-23 19:33:04,274 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2018-09-23 19:33:04,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:04,281 INFO L225 Difference]: With dead ends: 2887 [2018-09-23 19:33:04,282 INFO L226 Difference]: Without dead ends: 2885 [2018-09-23 19:33:04,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 5023 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3166, Invalid=9716, Unknown=0, NotChecked=0, Total=12882 [2018-09-23 19:33:04,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2018-09-23 19:33:05,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2102. [2018-09-23 19:33:05,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2102 states. [2018-09-23 19:33:05,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 2970 transitions. [2018-09-23 19:33:05,046 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 2970 transitions. Word has length 29 [2018-09-23 19:33:05,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:05,046 INFO L480 AbstractCegarLoop]: Abstraction has 2102 states and 2970 transitions. [2018-09-23 19:33:05,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 19:33:05,047 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 2970 transitions. [2018-09-23 19:33:05,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 19:33:05,049 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:05,049 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] [2018-09-23 19:33:05,049 INFO L423 AbstractCegarLoop]: === Iteration 41 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:05,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:05,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1174012687, now seen corresponding path program 2 times [2018-09-23 19:33:05,050 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:05,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:05,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:05,050 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:05,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-23 19:33:05,211 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:05,211 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:33:05,219 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:33:05,274 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:33:05,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:05,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:05,440 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 19:33:05,461 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:05,461 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2018-09-23 19:33:05,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:33:05,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:33:05,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:33:05,462 INFO L87 Difference]: Start difference. First operand 2102 states and 2970 transitions. Second operand 16 states. [2018-09-23 19:33:10,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:10,898 INFO L93 Difference]: Finished difference Result 6948 states and 9725 transitions. [2018-09-23 19:33:10,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-23 19:33:10,898 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2018-09-23 19:33:10,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:10,909 INFO L225 Difference]: With dead ends: 6948 [2018-09-23 19:33:10,909 INFO L226 Difference]: Without dead ends: 4896 [2018-09-23 19:33:10,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6484 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2880, Invalid=14150, Unknown=0, NotChecked=0, Total=17030 [2018-09-23 19:33:10,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4896 states. [2018-09-23 19:33:12,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4896 to 3634. [2018-09-23 19:33:12,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3634 states. [2018-09-23 19:33:12,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 5080 transitions. [2018-09-23 19:33:12,475 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 5080 transitions. Word has length 33 [2018-09-23 19:33:12,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:12,475 INFO L480 AbstractCegarLoop]: Abstraction has 3634 states and 5080 transitions. [2018-09-23 19:33:12,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:33:12,475 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 5080 transitions. [2018-09-23 19:33:12,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 19:33:12,478 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:12,478 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] [2018-09-23 19:33:12,478 INFO L423 AbstractCegarLoop]: === Iteration 42 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:12,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:12,479 INFO L82 PathProgramCache]: Analyzing trace with hash -2110003385, now seen corresponding path program 1 times [2018-09-23 19:33:12,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:12,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:12,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:12,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:12,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:12,689 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:12,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:33:12,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:12,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:12,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:12,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 19:33:12,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:12,925 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2018-09-23 19:33:12,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:33:12,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:33:12,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:33:12,925 INFO L87 Difference]: Start difference. First operand 3634 states and 5080 transitions. Second operand 18 states. [2018-09-23 19:33:19,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:19,569 INFO L93 Difference]: Finished difference Result 5436 states and 7576 transitions. [2018-09-23 19:33:19,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 19:33:19,569 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2018-09-23 19:33:19,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:19,582 INFO L225 Difference]: With dead ends: 5436 [2018-09-23 19:33:19,582 INFO L226 Difference]: Without dead ends: 5349 [2018-09-23 19:33:19,585 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 [2018-09-23 19:33:19,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5349 states. [2018-09-23 19:33:21,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5349 to 4022. [2018-09-23 19:33:21,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4022 states. [2018-09-23 19:33:21,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4022 states to 4022 states and 5648 transitions. [2018-09-23 19:33:21,316 INFO L78 Accepts]: Start accepts. Automaton has 4022 states and 5648 transitions. Word has length 33 [2018-09-23 19:33:21,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:21,316 INFO L480 AbstractCegarLoop]: Abstraction has 4022 states and 5648 transitions. [2018-09-23 19:33:21,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:33:21,316 INFO L276 IsEmpty]: Start isEmpty. Operand 4022 states and 5648 transitions. [2018-09-23 19:33:21,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 19:33:21,319 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:21,319 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] [2018-09-23 19:33:21,320 INFO L423 AbstractCegarLoop]: === Iteration 43 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:21,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:21,320 INFO L82 PathProgramCache]: Analyzing trace with hash -895180230, now seen corresponding path program 3 times [2018-09-23 19:33:21,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:21,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:21,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:21,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:21,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:21,745 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:21,745 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:21,745 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:33:21,754 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:33:21,811 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-23 19:33:21,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:21,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:22,624 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 19:33:22,644 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:22,644 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2018-09-23 19:33:22,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 19:33:22,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 19:33:22,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:33:22,645 INFO L87 Difference]: Start difference. First operand 4022 states and 5648 transitions. Second operand 22 states. [2018-09-23 19:33:34,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:34,511 INFO L93 Difference]: Finished difference Result 8032 states and 11417 transitions. [2018-09-23 19:33:34,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-09-23 19:33:34,511 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 33 [2018-09-23 19:33:34,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:34,526 INFO L225 Difference]: With dead ends: 8032 [2018-09-23 19:33:34,526 INFO L226 Difference]: Without dead ends: 7935 [2018-09-23 19:33:34,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8181 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=4070, Invalid=17686, Unknown=0, NotChecked=0, Total=21756 [2018-09-23 19:33:34,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7935 states. [2018-09-23 19:33:36,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7935 to 4327. [2018-09-23 19:33:36,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4327 states. [2018-09-23 19:33:36,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4327 states to 4327 states and 6121 transitions. [2018-09-23 19:33:36,491 INFO L78 Accepts]: Start accepts. Automaton has 4327 states and 6121 transitions. Word has length 33 [2018-09-23 19:33:36,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:36,492 INFO L480 AbstractCegarLoop]: Abstraction has 4327 states and 6121 transitions. [2018-09-23 19:33:36,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 19:33:36,492 INFO L276 IsEmpty]: Start isEmpty. Operand 4327 states and 6121 transitions. [2018-09-23 19:33:36,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 19:33:36,496 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:36,496 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] [2018-09-23 19:33:36,496 INFO L423 AbstractCegarLoop]: === Iteration 44 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:36,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:36,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1250173630, now seen corresponding path program 1 times [2018-09-23 19:33:36,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:36,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:36,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:36,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:36,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:36,668 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 19:33:36,668 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:36,669 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:33:36,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:36,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:36,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:36,850 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 19:33:36,871 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:36,871 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2018-09-23 19:33:36,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 19:33:36,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 19:33:36,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:33:36,872 INFO L87 Difference]: Start difference. First operand 4327 states and 6121 transitions. Second operand 19 states. [2018-09-23 19:33:45,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:45,243 INFO L93 Difference]: Finished difference Result 9177 states and 12958 transitions. [2018-09-23 19:33:45,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-23 19:33:45,243 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2018-09-23 19:33:45,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:45,256 INFO L225 Difference]: With dead ends: 9177 [2018-09-23 19:33:45,257 INFO L226 Difference]: Without dead ends: 5991 [2018-09-23 19:33:45,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4514 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2969, Invalid=11311, Unknown=0, NotChecked=0, Total=14280 [2018-09-23 19:33:45,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5991 states. [2018-09-23 19:33:47,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5991 to 4147. [2018-09-23 19:33:47,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4147 states. [2018-09-23 19:33:47,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4147 states to 4147 states and 5817 transitions. [2018-09-23 19:33:47,078 INFO L78 Accepts]: Start accepts. Automaton has 4147 states and 5817 transitions. Word has length 33 [2018-09-23 19:33:47,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:47,078 INFO L480 AbstractCegarLoop]: Abstraction has 4147 states and 5817 transitions. [2018-09-23 19:33:47,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 19:33:47,079 INFO L276 IsEmpty]: Start isEmpty. Operand 4147 states and 5817 transitions. [2018-09-23 19:33:47,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 19:33:47,082 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:47,082 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] [2018-09-23 19:33:47,082 INFO L423 AbstractCegarLoop]: === Iteration 45 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:47,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:47,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1810158453, now seen corresponding path program 2 times [2018-09-23 19:33:47,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:47,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:47,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:47,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:47,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:47,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:48,236 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:48,237 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:48,237 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:33:48,246 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:33:48,307 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:33:48,308 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:48,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:48,494 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:48,494 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2018-09-23 19:33:48,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:33:48,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:33:48,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:33:48,495 INFO L87 Difference]: Start difference. First operand 4147 states and 5817 transitions. Second operand 18 states. [2018-09-23 19:33:53,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:53,922 INFO L93 Difference]: Finished difference Result 5255 states and 7327 transitions. [2018-09-23 19:33:53,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 19:33:53,923 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2018-09-23 19:33:53,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:53,931 INFO L225 Difference]: With dead ends: 5255 [2018-09-23 19:33:53,931 INFO L226 Difference]: Without dead ends: 5253 [2018-09-23 19:33:53,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=346, Invalid=1460, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:33:53,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5253 states. [2018-09-23 19:33:55,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5253 to 4447. [2018-09-23 19:33:55,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4447 states. [2018-09-23 19:33:55,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4447 states to 4447 states and 6228 transitions. [2018-09-23 19:33:55,986 INFO L78 Accepts]: Start accepts. Automaton has 4447 states and 6228 transitions. Word has length 33 [2018-09-23 19:33:55,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:55,987 INFO L480 AbstractCegarLoop]: Abstraction has 4447 states and 6228 transitions. [2018-09-23 19:33:55,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:33:55,987 INFO L276 IsEmpty]: Start isEmpty. Operand 4447 states and 6228 transitions. [2018-09-23 19:33:55,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 19:33:55,990 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:55,990 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] [2018-09-23 19:33:55,991 INFO L423 AbstractCegarLoop]: === Iteration 46 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:55,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:55,991 INFO L82 PathProgramCache]: Analyzing trace with hash -667748710, now seen corresponding path program 1 times [2018-09-23 19:33:55,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:55,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:55,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:55,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:55,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:55,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:56,121 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:56,121 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:33:56,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:56,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:56,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 19:33:56,349 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:56,349 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2018-09-23 19:33:56,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:33:56,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:33:56,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:33:56,350 INFO L87 Difference]: Start difference. First operand 4447 states and 6228 transitions. Second operand 18 states. [2018-09-23 19:34:06,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:06,518 INFO L93 Difference]: Finished difference Result 7721 states and 10805 transitions. [2018-09-23 19:34:06,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-23 19:34:06,519 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2018-09-23 19:34:06,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:06,529 INFO L225 Difference]: With dead ends: 7721 [2018-09-23 19:34:06,529 INFO L226 Difference]: Without dead ends: 7719 [2018-09-23 19:34:06,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3331 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1278, Invalid=8228, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 19:34:06,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7719 states. [2018-09-23 19:34:09,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7719 to 5438. [2018-09-23 19:34:09,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5438 states. [2018-09-23 19:34:09,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5438 states to 5438 states and 7651 transitions. [2018-09-23 19:34:09,050 INFO L78 Accepts]: Start accepts. Automaton has 5438 states and 7651 transitions. Word has length 33 [2018-09-23 19:34:09,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:09,051 INFO L480 AbstractCegarLoop]: Abstraction has 5438 states and 7651 transitions. [2018-09-23 19:34:09,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:34:09,051 INFO L276 IsEmpty]: Start isEmpty. Operand 5438 states and 7651 transitions. [2018-09-23 19:34:09,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 19:34:09,055 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:09,055 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] [2018-09-23 19:34:09,056 INFO L423 AbstractCegarLoop]: === Iteration 47 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:09,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:09,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1146614399, now seen corresponding path program 2 times [2018-09-23 19:34:09,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:09,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:09,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:09,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:09,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:09,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:09,168 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-23 19:34:09,169 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:09,169 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:34:09,176 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:34:09,231 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:34:09,231 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:09,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:09,377 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 19:34:09,398 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:09,398 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2018-09-23 19:34:09,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:34:09,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:34:09,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:34:09,399 INFO L87 Difference]: Start difference. First operand 5438 states and 7651 transitions. Second operand 16 states. [2018-09-23 19:34:12,651 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-09-23 19:34:12,980 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-23 19:34:18,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:18,733 INFO L93 Difference]: Finished difference Result 15976 states and 22278 transitions. [2018-09-23 19:34:18,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-23 19:34:18,734 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2018-09-23 19:34:18,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:18,749 INFO L225 Difference]: With dead ends: 15976 [2018-09-23 19:34:18,749 INFO L226 Difference]: Without dead ends: 10483 [2018-09-23 19:34:18,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6466 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2880, Invalid=14150, Unknown=0, NotChecked=0, Total=17030 [2018-09-23 19:34:18,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10483 states. [2018-09-23 19:34:22,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10483 to 8111. [2018-09-23 19:34:22,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8111 states. [2018-09-23 19:34:22,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8111 states to 8111 states and 11260 transitions. [2018-09-23 19:34:22,739 INFO L78 Accepts]: Start accepts. Automaton has 8111 states and 11260 transitions. Word has length 33 [2018-09-23 19:34:22,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:22,740 INFO L480 AbstractCegarLoop]: Abstraction has 8111 states and 11260 transitions. [2018-09-23 19:34:22,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:34:22,740 INFO L276 IsEmpty]: Start isEmpty. Operand 8111 states and 11260 transitions. [2018-09-23 19:34:22,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 19:34:22,744 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:22,744 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] [2018-09-23 19:34:22,745 INFO L423 AbstractCegarLoop]: === Iteration 48 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:22,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:22,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1449531796, now seen corresponding path program 1 times [2018-09-23 19:34:22,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:22,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:22,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:22,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:22,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:22,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:22,925 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:22,926 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:22,926 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:34:22,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:22,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:23,107 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 19:34:23,130 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:23,130 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2018-09-23 19:34:23,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 19:34:23,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 19:34:23,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:34:23,131 INFO L87 Difference]: Start difference. First operand 8111 states and 11260 transitions. Second operand 19 states. [2018-09-23 19:34:32,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:32,031 INFO L93 Difference]: Finished difference Result 10277 states and 14246 transitions. [2018-09-23 19:34:32,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 19:34:32,032 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2018-09-23 19:34:32,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:32,047 INFO L225 Difference]: With dead ends: 10277 [2018-09-23 19:34:32,047 INFO L226 Difference]: Without dead ends: 10275 [2018-09-23 19:34:32,050 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 [2018-09-23 19:34:32,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10275 states. [2018-09-23 19:34:36,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10275 to 8291. [2018-09-23 19:34:36,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8291 states. [2018-09-23 19:34:36,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8291 states to 8291 states and 11531 transitions. [2018-09-23 19:34:36,055 INFO L78 Accepts]: Start accepts. Automaton has 8291 states and 11531 transitions. Word has length 33 [2018-09-23 19:34:36,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:36,055 INFO L480 AbstractCegarLoop]: Abstraction has 8291 states and 11531 transitions. [2018-09-23 19:34:36,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 19:34:36,056 INFO L276 IsEmpty]: Start isEmpty. Operand 8291 states and 11531 transitions. [2018-09-23 19:34:36,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 19:34:36,061 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:36,061 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] [2018-09-23 19:34:36,061 INFO L423 AbstractCegarLoop]: === Iteration 49 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:36,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:36,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1026480992, now seen corresponding path program 1 times [2018-09-23 19:34:36,062 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:36,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:36,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:36,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:36,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:36,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:36,275 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 19:34:36,275 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:36,275 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:34:36,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:36,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:36,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:36,439 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 19:34:36,461 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:36,461 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2018-09-23 19:34:36,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 19:34:36,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 19:34:36,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:34:36,462 INFO L87 Difference]: Start difference. First operand 8291 states and 11531 transitions. Second operand 19 states. [2018-09-23 19:34:46,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:46,918 INFO L93 Difference]: Finished difference Result 16294 states and 22694 transitions. [2018-09-23 19:34:46,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-23 19:34:46,918 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2018-09-23 19:34:46,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:46,932 INFO L225 Difference]: With dead ends: 16294 [2018-09-23 19:34:46,933 INFO L226 Difference]: Without dead ends: 9999 [2018-09-23 19:34:46,949 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 [2018-09-23 19:34:46,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9999 states. [2018-09-23 19:34:51,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9999 to 8241. [2018-09-23 19:34:51,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8241 states. [2018-09-23 19:34:51,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8241 states to 8241 states and 11466 transitions. [2018-09-23 19:34:51,064 INFO L78 Accepts]: Start accepts. Automaton has 8241 states and 11466 transitions. Word has length 33 [2018-09-23 19:34:51,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:51,065 INFO L480 AbstractCegarLoop]: Abstraction has 8241 states and 11466 transitions. [2018-09-23 19:34:51,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 19:34:51,065 INFO L276 IsEmpty]: Start isEmpty. Operand 8241 states and 11466 transitions. [2018-09-23 19:34:51,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 19:34:51,069 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:51,069 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] [2018-09-23 19:34:51,069 INFO L423 AbstractCegarLoop]: === Iteration 50 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:51,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:51,069 INFO L82 PathProgramCache]: Analyzing trace with hash 610357864, now seen corresponding path program 3 times [2018-09-23 19:34:51,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:51,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:51,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:51,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:51,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:51,581 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:51,582 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:51,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:34:51,590 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:34:51,652 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-23 19:34:51,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:51,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 19:34:51,786 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:51,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 21 [2018-09-23 19:34:51,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 19:34:51,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 19:34:51,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:34:51,787 INFO L87 Difference]: Start difference. First operand 8241 states and 11466 transitions. Second operand 21 states. [2018-09-23 19:35:12,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:12,053 INFO L93 Difference]: Finished difference Result 25684 states and 35500 transitions. [2018-09-23 19:35:12,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2018-09-23 19:35:12,053 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 33 [2018-09-23 19:35:12,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:12,076 INFO L225 Difference]: With dead ends: 25684 [2018-09-23 19:35:12,076 INFO L226 Difference]: Without dead ends: 16698 [2018-09-23 19:35:12,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18096 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=6678, Invalid=35142, Unknown=0, NotChecked=0, Total=41820 [2018-09-23 19:35:12,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16698 states. [2018-09-23 19:35:17,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16698 to 10011. [2018-09-23 19:35:17,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10011 states. [2018-09-23 19:35:17,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10011 states to 10011 states and 13930 transitions. [2018-09-23 19:35:17,139 INFO L78 Accepts]: Start accepts. Automaton has 10011 states and 13930 transitions. Word has length 33 [2018-09-23 19:35:17,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:17,139 INFO L480 AbstractCegarLoop]: Abstraction has 10011 states and 13930 transitions. [2018-09-23 19:35:17,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 19:35:17,139 INFO L276 IsEmpty]: Start isEmpty. Operand 10011 states and 13930 transitions. [2018-09-23 19:35:17,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 19:35:17,144 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:17,144 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] [2018-09-23 19:35:17,144 INFO L423 AbstractCegarLoop]: === Iteration 51 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:17,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:17,144 INFO L82 PathProgramCache]: Analyzing trace with hash 690693469, now seen corresponding path program 1 times [2018-09-23 19:35:17,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:17,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:17,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:17,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:17,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:17,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:17,351 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:17,351 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:17,351 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:17,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:17,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:17,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:17,583 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 19:35:17,603 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:17,604 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2018-09-23 19:35:17,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 19:35:17,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 19:35:17,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:35:17,605 INFO L87 Difference]: Start difference. First operand 10011 states and 13930 transitions. Second operand 21 states. [2018-09-23 19:35:29,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:29,844 INFO L93 Difference]: Finished difference Result 12668 states and 17557 transitions. [2018-09-23 19:35:29,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-23 19:35:29,844 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 33 [2018-09-23 19:35:29,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:29,860 INFO L225 Difference]: With dead ends: 12668 [2018-09-23 19:35:29,860 INFO L226 Difference]: Without dead ends: 12586 [2018-09-23 19:35:29,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2220 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=841, Invalid=6131, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 19:35:29,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12586 states. [2018-09-23 19:35:35,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12586 to 10468. [2018-09-23 19:35:35,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10468 states. [2018-09-23 19:35:35,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10468 states to 10468 states and 14569 transitions. [2018-09-23 19:35:35,208 INFO L78 Accepts]: Start accepts. Automaton has 10468 states and 14569 transitions. Word has length 33 [2018-09-23 19:35:35,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:35,209 INFO L480 AbstractCegarLoop]: Abstraction has 10468 states and 14569 transitions. [2018-09-23 19:35:35,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 19:35:35,209 INFO L276 IsEmpty]: Start isEmpty. Operand 10468 states and 14569 transitions. [2018-09-23 19:35:35,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 19:35:35,215 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:35,215 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:35:35,215 INFO L423 AbstractCegarLoop]: === Iteration 52 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:35,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:35,216 INFO L82 PathProgramCache]: Analyzing trace with hash -2121918017, now seen corresponding path program 3 times [2018-09-23 19:35:35,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:35,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:35,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:35,217 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:35,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:35,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:35,431 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:35,431 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:35,431 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:35,439 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:35:35,518 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-23 19:35:35,519 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:35,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:35,686 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:35,686 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-09-23 19:35:35,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:35:35,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:35:35,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:35:35,687 INFO L87 Difference]: Start difference. First operand 10468 states and 14569 transitions. Second operand 17 states. Received shutdown request... [2018-09-23 19:35:36,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:35:36,967 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 19:35:36,974 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 19:35:36,974 INFO L202 PluginConnector]: Adding new model threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 07:35:36 BoogieIcfgContainer [2018-09-23 19:35:36,974 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 19:35:36,975 INFO L168 Benchmark]: Toolchain (without parser) took 251972.83 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 2.7 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-09-23 19:35:36,976 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:35:36,976 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:35:36,976 INFO L168 Benchmark]: Boogie Preprocessor took 24.62 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:35:36,977 INFO L168 Benchmark]: RCFGBuilder took 608.43 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-23 19:35:36,977 INFO L168 Benchmark]: TraceAbstraction took 251286.87 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 2.7 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-09-23 19:35:36,980 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 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.62 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 608.43 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 251286.87 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 2.7 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.2 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 BasicCegarLoop was constructing difference of abstraction (10468states) and FLOYD_HOARE automaton (currently 17 states, 17 states before enhancement), while ReachableStatesComputation was computing reachable states (254 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 99). Cancelled while BasicCegarLoop was constructing difference of abstraction (10468states) and FLOYD_HOARE automaton (currently 17 states, 17 states before enhancement), while ReachableStatesComputation was computing reachable states (254 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 121]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 121). Cancelled while BasicCegarLoop was constructing difference of abstraction (10468states) and FLOYD_HOARE automaton (currently 17 states, 17 states before enhancement), while ReachableStatesComputation was computing reachable states (254 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 112]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 112). Cancelled while BasicCegarLoop was constructing difference of abstraction (10468states) and FLOYD_HOARE automaton (currently 17 states, 17 states before enhancement), while ReachableStatesComputation was computing reachable states (254 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 48 locations, 4 error locations. TIMEOUT Result, 251.2s OverallTime, 52 OverallIterations, 4 TraceHistogramMax, 184.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3806 SDtfs, 10502 SDslu, 7574 SDs, 0 SdLazy, 52861 SolverSat, 14090 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 52.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3919 GetRequests, 1075 SyntacticMatches, 12 SemanticMatches, 2832 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 85859 ImplicationChecksByTransitivity, 73.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10468occurred in iteration=51, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 42.7s AutomataMinimizationTime, 51 MinimizatonAttempts, 34219 StatesRemovedByMinimization, 51 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 19.1s InterpolantComputationTime, 2174 NumberOfCodeBlocks, 2174 NumberOfCodeBlocksAsserted, 112 NumberOfCheckSat, 2073 ConstructedInterpolants, 35 QuantifiedInterpolants, 234989 SizeOfPredicates, 824 NumberOfNonLiveVariables, 14651 ConjunctsInSsa, 1557 ConjunctsInUnsatCore, 101 InterpolantComputations, 9 PerfectInterpolantSequences, 199/838 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-0-2018-09-23_19-35-36-990.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-0-2018-09-23_19-35-36-990.csv Completed graceful shutdown