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.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-00a8621 [2018-09-30 10:15:01,825 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 10:15:01,827 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 10:15:01,839 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 10:15:01,839 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 10:15:01,840 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 10:15:01,841 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 10:15:01,843 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 10:15:01,845 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 10:15:01,846 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 10:15:01,847 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 10:15:01,847 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 10:15:01,848 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 10:15:01,849 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 10:15:01,850 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 10:15:01,851 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 10:15:01,852 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 10:15:01,853 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 10:15:01,855 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 10:15:01,857 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 10:15:01,858 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 10:15:01,860 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 10:15:01,862 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-30 10:15:01,862 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-30 10:15:01,863 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-30 10:15:01,864 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-30 10:15:01,865 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-30 10:15:01,866 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-30 10:15:01,866 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-30 10:15:01,868 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-30 10:15:01,868 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-30 10:15:01,869 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-09-30 10:15:01,871 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 [2018-09-30 10:15:01,892 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 10:15:01,892 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 10:15:01,893 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 10:15:01,893 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 10:15:01,894 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 10:15:01,894 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 10:15:01,894 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 10:15:01,895 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 10:15:01,895 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 10:15:01,895 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 10:15:01,895 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 10:15:01,895 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 10:15:01,898 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 10:15:01,898 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 10:15:01,898 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 10:15:01,899 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 10:15:01,899 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 10:15:01,899 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 10:15:01,899 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 10:15:01,900 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 10:15:01,901 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 10:15:01,901 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 10:15:01,901 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:15:01,901 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 10:15:01,901 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 10:15:01,902 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 10:15:01,902 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 10:15:01,902 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 10:15:01,902 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 10:15:01,902 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 10:15:01,968 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 10:15:01,984 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 10:15:01,990 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 10:15:01,992 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 10:15:01,992 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 10:15:01,993 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/threadpooling_product.bpl [2018-09-30 10:15:01,993 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/threadpooling_product.bpl' [2018-09-30 10:15:02,048 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 10:15:02,051 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 10:15:02,051 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 10:15:02,052 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 10:15:02,052 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 10:15:02,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:15:02" (1/1) ... [2018-09-30 10:15:02,083 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:15:02" (1/1) ... [2018-09-30 10:15:02,087 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 10:15:02,088 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 10:15:02,088 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 10:15:02,090 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 10:15:02,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 10:15:02,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 10:15:02,091 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 10:15:02,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:15:02" (1/1) ... [2018-09-30 10:15:02,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:15:02" (1/1) ... [2018-09-30 10:15:02,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:15:02" (1/1) ... [2018-09-30 10:15:02,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:15:02" (1/1) ... [2018-09-30 10:15:02,107 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:15:02" (1/1) ... [2018-09-30 10:15:02,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:15:02" (1/1) ... [2018-09-30 10:15:02,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:15:02" (1/1) ... [2018-09-30 10:15:02,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 10:15:02,113 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 10:15:02,114 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 10:15:02,114 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 10:15:02,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:15:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:15:02,189 INFO L124 BoogieDeclarations]: Specification and implementation of procedure product given in one single declaration [2018-09-30 10:15:02,189 INFO L130 BoogieDeclarations]: Found specification of procedure product [2018-09-30 10:15:02,189 INFO L138 BoogieDeclarations]: Found implementation of procedure product [2018-09-30 10:15:02,755 INFO L345 CfgBuilder]: Using library mode [2018-09-30 10:15:02,756 INFO L202 PluginConnector]: Adding new model threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:15:02 BoogieIcfgContainer [2018-09-30 10:15:02,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 10:15:02,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 10:15:02,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 10:15:02,761 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 10:15:02,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:15:02" (1/2) ... [2018-09-30 10:15:02,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548bead8 and model type threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 10:15:02, skipping insertion in model container [2018-09-30 10:15:02,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:15:02" (2/2) ... [2018-09-30 10:15:02,765 INFO L112 eAbstractionObserver]: Analyzing ICFG threadpooling_product.bpl [2018-09-30 10:15:02,775 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 10:15:02,783 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-09-30 10:15:02,833 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 10:15:02,834 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 10:15:02,834 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 10:15:02,834 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 10:15:02,834 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 10:15:02,835 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 10:15:02,835 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 10:15:02,835 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 10:15:02,835 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 10:15:02,848 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-09-30 10:15:02,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 10:15:02,855 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:02,856 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-30 10:15:02,857 INFO L423 AbstractCegarLoop]: === Iteration 1 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:02,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:02,863 INFO L82 PathProgramCache]: Analyzing trace with hash 28755683, now seen corresponding path program 1 times [2018-09-30 10:15:02,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:02,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:02,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:02,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:02,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:02,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:03,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:03,060 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:15:03,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 10:15:03,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 10:15:03,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 10:15:03,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:15:03,081 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2018-09-30 10:15:03,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:03,759 INFO L93 Difference]: Finished difference Result 49 states and 85 transitions. [2018-09-30 10:15:03,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:15:03,761 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-30 10:15:03,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:03,776 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:15:03,776 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:15:03,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:15:03,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:15:03,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-09-30 10:15:03,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:15:03,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2018-09-30 10:15:03,829 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 5 [2018-09-30 10:15:03,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:03,829 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2018-09-30 10:15:03,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 10:15:03,830 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2018-09-30 10:15:03,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 10:15:03,830 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:03,831 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-30 10:15:03,831 INFO L423 AbstractCegarLoop]: === Iteration 2 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:03,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:03,832 INFO L82 PathProgramCache]: Analyzing trace with hash 28971747, now seen corresponding path program 1 times [2018-09-30 10:15:03,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:03,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:03,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:03,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:03,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:03,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:03,915 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:15:03,915 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 10:15:03,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 10:15:03,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 10:15:03,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:15:03,918 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 5 states. [2018-09-30 10:15:04,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:04,266 INFO L93 Difference]: Finished difference Result 57 states and 99 transitions. [2018-09-30 10:15:04,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:15:04,267 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-30 10:15:04,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:04,269 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:15:04,269 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:15:04,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:15:04,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:15:04,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2018-09-30 10:15:04,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 10:15:04,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 63 transitions. [2018-09-30 10:15:04,280 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 63 transitions. Word has length 5 [2018-09-30 10:15:04,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:04,283 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 63 transitions. [2018-09-30 10:15:04,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 10:15:04,283 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 63 transitions. [2018-09-30 10:15:04,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 10:15:04,284 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:04,284 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:04,285 INFO L423 AbstractCegarLoop]: === Iteration 3 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:04,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:04,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1864688358, now seen corresponding path program 1 times [2018-09-30 10:15:04,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:04,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:04,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:04,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:04,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:04,533 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:15:04,533 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-30 10:15:04,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:15:04,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:15:04,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:15:04,535 INFO L87 Difference]: Start difference. First operand 38 states and 63 transitions. Second operand 7 states. [2018-09-30 10:15:05,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:05,717 INFO L93 Difference]: Finished difference Result 84 states and 147 transitions. [2018-09-30 10:15:05,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:15:05,717 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-30 10:15:05,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:05,720 INFO L225 Difference]: With dead ends: 84 [2018-09-30 10:15:05,720 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 10:15:05,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:15:05,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 10:15:05,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 51. [2018-09-30 10:15:05,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 10:15:05,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 86 transitions. [2018-09-30 10:15:05,738 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 86 transitions. Word has length 7 [2018-09-30 10:15:05,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:05,739 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 86 transitions. [2018-09-30 10:15:05,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:15:05,739 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 86 transitions. [2018-09-30 10:15:05,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 10:15:05,740 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:05,741 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-30 10:15:05,741 INFO L423 AbstractCegarLoop]: === Iteration 4 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:05,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:05,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1865765160, now seen corresponding path program 1 times [2018-09-30 10:15:05,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:05,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:05,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:05,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:05,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:05,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:05,892 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:05,893 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:15:05,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:05,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:05,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:06,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:06,181 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:15:06,181 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2018-09-30 10:15:06,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:15:06,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:15:06,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:15:06,183 INFO L87 Difference]: Start difference. First operand 51 states and 86 transitions. Second operand 9 states. [2018-09-30 10:15:07,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:07,044 INFO L93 Difference]: Finished difference Result 142 states and 245 transitions. [2018-09-30 10:15:07,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 10:15:07,046 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 7 [2018-09-30 10:15:07,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:07,048 INFO L225 Difference]: With dead ends: 142 [2018-09-30 10:15:07,048 INFO L226 Difference]: Without dead ends: 108 [2018-09-30 10:15:07,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2018-09-30 10:15:07,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-30 10:15:07,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 73. [2018-09-30 10:15:07,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 10:15:07,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 120 transitions. [2018-09-30 10:15:07,067 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 120 transitions. Word has length 7 [2018-09-30 10:15:07,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:07,068 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 120 transitions. [2018-09-30 10:15:07,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:15:07,068 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 120 transitions. [2018-09-30 10:15:07,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 10:15:07,069 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:07,069 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:07,069 INFO L423 AbstractCegarLoop]: === Iteration 5 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:07,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:07,070 INFO L82 PathProgramCache]: Analyzing trace with hash 964893579, now seen corresponding path program 1 times [2018-09-30 10:15:07,070 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:07,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:07,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:07,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:07,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:07,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:07,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:07,212 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:07,213 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:15:07,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:07,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:07,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:07,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:07,277 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:15:07,277 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2018-09-30 10:15:07,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:15:07,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:15:07,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:15:07,278 INFO L87 Difference]: Start difference. First operand 73 states and 120 transitions. Second operand 11 states. [2018-09-30 10:15:08,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:08,003 INFO L93 Difference]: Finished difference Result 148 states and 240 transitions. [2018-09-30 10:15:08,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 10:15:08,004 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 9 [2018-09-30 10:15:08,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:08,006 INFO L225 Difference]: With dead ends: 148 [2018-09-30 10:15:08,006 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 10:15:08,009 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=466, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:15:08,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 10:15:08,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 78. [2018-09-30 10:15:08,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 10:15:08,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 119 transitions. [2018-09-30 10:15:08,024 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 119 transitions. Word has length 9 [2018-09-30 10:15:08,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:08,025 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 119 transitions. [2018-09-30 10:15:08,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:15:08,025 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 119 transitions. [2018-09-30 10:15:08,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:15:08,026 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:08,026 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:08,027 INFO L423 AbstractCegarLoop]: === Iteration 6 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:08,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:08,027 INFO L82 PathProgramCache]: Analyzing trace with hash 101966393, now seen corresponding path program 1 times [2018-09-30 10:15:08,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:08,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:08,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:08,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:08,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:08,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:08,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:08,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:08,226 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 [2018-09-30 10:15:08,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:08,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:08,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:08,481 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:08,481 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-30 10:15:08,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:15:08,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:15:08,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:15:08,483 INFO L87 Difference]: Start difference. First operand 78 states and 119 transitions. Second operand 14 states. [2018-09-30 10:15:08,803 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2018-09-30 10:15:09,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:09,448 INFO L93 Difference]: Finished difference Result 124 states and 193 transitions. [2018-09-30 10:15:09,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 10:15:09,449 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-30 10:15:09,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:09,450 INFO L225 Difference]: With dead ends: 124 [2018-09-30 10:15:09,450 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 10:15:09,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2018-09-30 10:15:09,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 10:15:09,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 107. [2018-09-30 10:15:09,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 10:15:09,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 173 transitions. [2018-09-30 10:15:09,470 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 173 transitions. Word has length 10 [2018-09-30 10:15:09,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:09,470 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 173 transitions. [2018-09-30 10:15:09,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:15:09,471 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 173 transitions. [2018-09-30 10:15:09,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:15:09,472 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:09,472 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:09,472 INFO L423 AbstractCegarLoop]: === Iteration 7 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:09,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:09,474 INFO L82 PathProgramCache]: Analyzing trace with hash 103259259, now seen corresponding path program 1 times [2018-09-30 10:15:09,474 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:09,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:09,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:09,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:09,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:09,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:09,596 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:15:09,596 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-30 10:15:09,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:15:09,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:15:09,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:15:09,597 INFO L87 Difference]: Start difference. First operand 107 states and 173 transitions. Second operand 8 states. [2018-09-30 10:15:10,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:10,175 INFO L93 Difference]: Finished difference Result 132 states and 203 transitions. [2018-09-30 10:15:10,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 10:15:10,176 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2018-09-30 10:15:10,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:10,177 INFO L225 Difference]: With dead ends: 132 [2018-09-30 10:15:10,177 INFO L226 Difference]: Without dead ends: 130 [2018-09-30 10:15:10,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:15:10,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-30 10:15:10,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 121. [2018-09-30 10:15:10,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 10:15:10,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 196 transitions. [2018-09-30 10:15:10,196 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 196 transitions. Word has length 10 [2018-09-30 10:15:10,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:10,196 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 196 transitions. [2018-09-30 10:15:10,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:15:10,197 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 196 transitions. [2018-09-30 10:15:10,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:15:10,198 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:10,198 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:10,198 INFO L423 AbstractCegarLoop]: === Iteration 8 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:10,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:10,199 INFO L82 PathProgramCache]: Analyzing trace with hash -176034144, now seen corresponding path program 1 times [2018-09-30 10:15:10,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:10,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:10,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:10,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:10,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:10,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:10,314 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:10,314 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 [2018-09-30 10:15:10,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:10,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:10,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:10,625 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:10,625 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-30 10:15:10,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:15:10,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:15:10,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:15:10,627 INFO L87 Difference]: Start difference. First operand 121 states and 196 transitions. Second operand 14 states. [2018-09-30 10:15:12,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:12,206 INFO L93 Difference]: Finished difference Result 162 states and 262 transitions. [2018-09-30 10:15:12,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 10:15:12,207 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-30 10:15:12,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:12,208 INFO L225 Difference]: With dead ends: 162 [2018-09-30 10:15:12,208 INFO L226 Difference]: Without dead ends: 160 [2018-09-30 10:15:12,209 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:15:12,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-30 10:15:12,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 129. [2018-09-30 10:15:12,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-30 10:15:12,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 209 transitions. [2018-09-30 10:15:12,231 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 209 transitions. Word has length 10 [2018-09-30 10:15:12,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:12,232 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 209 transitions. [2018-09-30 10:15:12,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:15:12,232 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 209 transitions. [2018-09-30 10:15:12,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:15:12,233 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:12,233 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:12,234 INFO L423 AbstractCegarLoop]: === Iteration 9 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:12,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:12,234 INFO L82 PathProgramCache]: Analyzing trace with hash -176034432, now seen corresponding path program 1 times [2018-09-30 10:15:12,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:12,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:12,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:12,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:12,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:12,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:12,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:12,718 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:12,718 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 [2018-09-30 10:15:12,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:12,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:12,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:12,942 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:12,942 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2018-09-30 10:15:12,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:15:12,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:15:12,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:15:12,943 INFO L87 Difference]: Start difference. First operand 129 states and 209 transitions. Second operand 13 states. [2018-09-30 10:15:14,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:14,399 INFO L93 Difference]: Finished difference Result 223 states and 343 transitions. [2018-09-30 10:15:14,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 10:15:14,399 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 10 [2018-09-30 10:15:14,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:14,400 INFO L225 Difference]: With dead ends: 223 [2018-09-30 10:15:14,401 INFO L226 Difference]: Without dead ends: 221 [2018-09-30 10:15:14,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=349, Invalid=1631, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 10:15:14,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-30 10:15:14,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 167. [2018-09-30 10:15:14,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-30 10:15:14,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 274 transitions. [2018-09-30 10:15:14,429 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 274 transitions. Word has length 10 [2018-09-30 10:15:14,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:14,429 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 274 transitions. [2018-09-30 10:15:14,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:15:14,429 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 274 transitions. [2018-09-30 10:15:14,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:15:14,430 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:14,430 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:14,431 INFO L423 AbstractCegarLoop]: === Iteration 10 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:14,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:14,431 INFO L82 PathProgramCache]: Analyzing trace with hash -184622601, now seen corresponding path program 1 times [2018-09-30 10:15:14,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:14,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:14,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:14,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:14,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:14,565 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:14,565 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 [2018-09-30 10:15:14,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:14,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:14,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:14,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:14,701 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:14,701 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-30 10:15:14,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:15:14,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:15:14,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:15:14,702 INFO L87 Difference]: Start difference. First operand 167 states and 274 transitions. Second operand 14 states. [2018-09-30 10:15:16,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:16,118 INFO L93 Difference]: Finished difference Result 222 states and 351 transitions. [2018-09-30 10:15:16,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 10:15:16,120 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-30 10:15:16,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:16,121 INFO L225 Difference]: With dead ends: 222 [2018-09-30 10:15:16,122 INFO L226 Difference]: Without dead ends: 221 [2018-09-30 10:15:16,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2018-09-30 10:15:16,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-30 10:15:16,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 181. [2018-09-30 10:15:16,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-30 10:15:16,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 297 transitions. [2018-09-30 10:15:16,154 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 297 transitions. Word has length 10 [2018-09-30 10:15:16,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:16,154 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 297 transitions. [2018-09-30 10:15:16,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:15:16,155 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 297 transitions. [2018-09-30 10:15:16,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:15:16,155 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:16,156 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:16,156 INFO L423 AbstractCegarLoop]: === Iteration 11 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:16,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:16,161 INFO L82 PathProgramCache]: Analyzing trace with hash -184621319, now seen corresponding path program 1 times [2018-09-30 10:15:16,161 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:16,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:16,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:16,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:16,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:16,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:16,333 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:15:16,333 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-30 10:15:16,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:15:16,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:15:16,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:15:16,334 INFO L87 Difference]: Start difference. First operand 181 states and 297 transitions. Second operand 8 states. [2018-09-30 10:15:16,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:16,678 INFO L93 Difference]: Finished difference Result 203 states and 320 transitions. [2018-09-30 10:15:16,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 10:15:16,684 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2018-09-30 10:15:16,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:16,685 INFO L225 Difference]: With dead ends: 203 [2018-09-30 10:15:16,685 INFO L226 Difference]: Without dead ends: 201 [2018-09-30 10:15:16,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:15:16,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-30 10:15:16,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 183. [2018-09-30 10:15:16,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-30 10:15:16,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 301 transitions. [2018-09-30 10:15:16,712 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 301 transitions. Word has length 10 [2018-09-30 10:15:16,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:16,712 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 301 transitions. [2018-09-30 10:15:16,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:15:16,713 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 301 transitions. [2018-09-30 10:15:16,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:15:16,713 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:16,714 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:16,714 INFO L423 AbstractCegarLoop]: === Iteration 12 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:16,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:16,714 INFO L82 PathProgramCache]: Analyzing trace with hash -973282432, now seen corresponding path program 1 times [2018-09-30 10:15:16,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:16,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:16,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:16,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:16,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:16,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:16,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:16,863 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:16,864 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 [2018-09-30 10:15:16,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:16,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:16,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:16,986 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:16,986 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-30 10:15:16,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:15:16,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:15:16,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:15:16,988 INFO L87 Difference]: Start difference. First operand 183 states and 301 transitions. Second operand 14 states. [2018-09-30 10:15:18,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:18,738 INFO L93 Difference]: Finished difference Result 241 states and 385 transitions. [2018-09-30 10:15:18,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 10:15:18,738 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-30 10:15:18,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:18,740 INFO L225 Difference]: With dead ends: 241 [2018-09-30 10:15:18,740 INFO L226 Difference]: Without dead ends: 240 [2018-09-30 10:15:18,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2018-09-30 10:15:18,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-09-30 10:15:18,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 202. [2018-09-30 10:15:18,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-09-30 10:15:18,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 336 transitions. [2018-09-30 10:15:18,765 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 336 transitions. Word has length 10 [2018-09-30 10:15:18,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:18,766 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 336 transitions. [2018-09-30 10:15:18,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:15:18,766 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 336 transitions. [2018-09-30 10:15:18,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:15:18,767 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:18,767 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:18,767 INFO L423 AbstractCegarLoop]: === Iteration 13 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:18,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:18,768 INFO L82 PathProgramCache]: Analyzing trace with hash -973281662, now seen corresponding path program 1 times [2018-09-30 10:15:18,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:18,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:18,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:18,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:18,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:18,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:18,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:18,897 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:15:18,897 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-30 10:15:18,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:15:18,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:15:18,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:15:18,899 INFO L87 Difference]: Start difference. First operand 202 states and 336 transitions. Second operand 8 states. [2018-09-30 10:15:19,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:19,213 INFO L93 Difference]: Finished difference Result 220 states and 353 transitions. [2018-09-30 10:15:19,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 10:15:19,213 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2018-09-30 10:15:19,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:19,214 INFO L225 Difference]: With dead ends: 220 [2018-09-30 10:15:19,215 INFO L226 Difference]: Without dead ends: 218 [2018-09-30 10:15:19,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:15:19,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-09-30 10:15:19,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 210. [2018-09-30 10:15:19,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-09-30 10:15:19,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 348 transitions. [2018-09-30 10:15:19,242 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 348 transitions. Word has length 10 [2018-09-30 10:15:19,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:19,242 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 348 transitions. [2018-09-30 10:15:19,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:15:19,242 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 348 transitions. [2018-09-30 10:15:19,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:15:19,243 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:19,243 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:19,243 INFO L423 AbstractCegarLoop]: === Iteration 14 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:19,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:19,244 INFO L82 PathProgramCache]: Analyzing trace with hash -981870601, now seen corresponding path program 1 times [2018-09-30 10:15:19,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:19,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:19,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:19,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:19,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:19,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:19,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:19,385 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:19,386 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 [2018-09-30 10:15:19,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:19,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:19,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:19,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:19,509 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:19,509 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2018-09-30 10:15:19,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:15:19,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:15:19,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:15:19,510 INFO L87 Difference]: Start difference. First operand 210 states and 348 transitions. Second operand 13 states. [2018-09-30 10:15:20,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:20,729 INFO L93 Difference]: Finished difference Result 320 states and 507 transitions. [2018-09-30 10:15:20,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 10:15:20,730 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 10 [2018-09-30 10:15:20,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:20,731 INFO L225 Difference]: With dead ends: 320 [2018-09-30 10:15:20,731 INFO L226 Difference]: Without dead ends: 318 [2018-09-30 10:15:20,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=1631, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 10:15:20,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-09-30 10:15:20,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 259. [2018-09-30 10:15:20,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-09-30 10:15:20,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 430 transitions. [2018-09-30 10:15:20,762 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 430 transitions. Word has length 10 [2018-09-30 10:15:20,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:20,762 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 430 transitions. [2018-09-30 10:15:20,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:15:20,763 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 430 transitions. [2018-09-30 10:15:20,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:15:20,763 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:20,763 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:20,764 INFO L423 AbstractCegarLoop]: === Iteration 15 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:20,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:20,764 INFO L82 PathProgramCache]: Analyzing trace with hash -981870889, now seen corresponding path program 1 times [2018-09-30 10:15:20,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:20,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:20,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:20,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:20,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:20,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:20,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:20,826 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:20,826 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 [2018-09-30 10:15:20,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:20,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:20,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:20,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:20,972 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:20,973 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-30 10:15:20,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:15:20,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:15:20,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:15:20,974 INFO L87 Difference]: Start difference. First operand 259 states and 430 transitions. Second operand 14 states. [2018-09-30 10:15:21,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:21,463 INFO L93 Difference]: Finished difference Result 304 states and 503 transitions. [2018-09-30 10:15:21,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 10:15:21,464 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-30 10:15:21,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:21,465 INFO L225 Difference]: With dead ends: 304 [2018-09-30 10:15:21,465 INFO L226 Difference]: Without dead ends: 302 [2018-09-30 10:15:21,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:15:21,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2018-09-30 10:15:21,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 270. [2018-09-30 10:15:21,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-09-30 10:15:21,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 448 transitions. [2018-09-30 10:15:21,503 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 448 transitions. Word has length 10 [2018-09-30 10:15:21,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:21,503 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 448 transitions. [2018-09-30 10:15:21,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:15:21,503 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 448 transitions. [2018-09-30 10:15:21,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:15:21,504 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:21,504 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:21,504 INFO L423 AbstractCegarLoop]: === Iteration 16 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:21,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:21,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1101306322, now seen corresponding path program 1 times [2018-09-30 10:15:21,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:21,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:21,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:21,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:21,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:21,627 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:21,627 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 [2018-09-30 10:15:21,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:21,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:21,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:21,728 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:21,728 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-30 10:15:21,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:15:21,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:15:21,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:15:21,729 INFO L87 Difference]: Start difference. First operand 270 states and 448 transitions. Second operand 14 states. [2018-09-30 10:15:22,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:22,174 INFO L93 Difference]: Finished difference Result 281 states and 455 transitions. [2018-09-30 10:15:22,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 10:15:22,175 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-30 10:15:22,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:22,176 INFO L225 Difference]: With dead ends: 281 [2018-09-30 10:15:22,176 INFO L226 Difference]: Without dead ends: 280 [2018-09-30 10:15:22,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2018-09-30 10:15:22,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2018-09-30 10:15:22,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 270. [2018-09-30 10:15:22,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-09-30 10:15:22,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 447 transitions. [2018-09-30 10:15:22,217 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 447 transitions. Word has length 10 [2018-09-30 10:15:22,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:22,217 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 447 transitions. [2018-09-30 10:15:22,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:15:22,217 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 447 transitions. [2018-09-30 10:15:22,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:15:22,218 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:22,218 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:22,218 INFO L423 AbstractCegarLoop]: === Iteration 17 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:22,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:22,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1102106644, now seen corresponding path program 1 times [2018-09-30 10:15:22,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:22,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:22,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:22,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:22,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:22,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:22,621 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 7 [2018-09-30 10:15:22,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:22,673 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:15:22,673 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-30 10:15:22,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:15:22,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:15:22,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:15:22,674 INFO L87 Difference]: Start difference. First operand 270 states and 447 transitions. Second operand 8 states. [2018-09-30 10:15:23,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:23,034 INFO L93 Difference]: Finished difference Result 286 states and 460 transitions. [2018-09-30 10:15:23,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 10:15:23,035 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2018-09-30 10:15:23,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:23,037 INFO L225 Difference]: With dead ends: 286 [2018-09-30 10:15:23,037 INFO L226 Difference]: Without dead ends: 284 [2018-09-30 10:15:23,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:15:23,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2018-09-30 10:15:23,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 268. [2018-09-30 10:15:23,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-09-30 10:15:23,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 443 transitions. [2018-09-30 10:15:23,080 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 443 transitions. Word has length 10 [2018-09-30 10:15:23,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:23,080 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 443 transitions. [2018-09-30 10:15:23,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:15:23,081 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 443 transitions. [2018-09-30 10:15:23,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 10:15:23,081 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:23,082 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:23,082 INFO L423 AbstractCegarLoop]: === Iteration 18 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:23,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:23,082 INFO L82 PathProgramCache]: Analyzing trace with hash 240543358, now seen corresponding path program 1 times [2018-09-30 10:15:23,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:23,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:23,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:23,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:23,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:24,020 WARN L178 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2018-09-30 10:15:24,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:24,379 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:24,379 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 [2018-09-30 10:15:24,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:24,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:24,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:24,580 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:24,580 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2018-09-30 10:15:24,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:15:24,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:15:24,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:15:24,581 INFO L87 Difference]: Start difference. First operand 268 states and 443 transitions. Second operand 16 states. [2018-09-30 10:15:26,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:26,461 INFO L93 Difference]: Finished difference Result 515 states and 842 transitions. [2018-09-30 10:15:26,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 10:15:26,461 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2018-09-30 10:15:26,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:26,464 INFO L225 Difference]: With dead ends: 515 [2018-09-30 10:15:26,464 INFO L226 Difference]: Without dead ends: 513 [2018-09-30 10:15:26,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:15:26,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2018-09-30 10:15:26,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 338. [2018-09-30 10:15:26,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2018-09-30 10:15:26,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 568 transitions. [2018-09-30 10:15:26,524 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 568 transitions. Word has length 12 [2018-09-30 10:15:26,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:26,525 INFO L480 AbstractCegarLoop]: Abstraction has 338 states and 568 transitions. [2018-09-30 10:15:26,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:15:26,525 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 568 transitions. [2018-09-30 10:15:26,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 10:15:26,526 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:26,526 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:26,526 INFO L423 AbstractCegarLoop]: === Iteration 19 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:26,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:26,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1525011273, now seen corresponding path program 1 times [2018-09-30 10:15:26,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:26,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:26,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:26,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:26,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:26,700 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:26,700 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 [2018-09-30 10:15:26,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:26,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:26,863 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:26,863 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2018-09-30 10:15:26,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:15:26,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:15:26,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:15:26,864 INFO L87 Difference]: Start difference. First operand 338 states and 568 transitions. Second operand 16 states. [2018-09-30 10:15:28,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:28,296 INFO L93 Difference]: Finished difference Result 631 states and 1050 transitions. [2018-09-30 10:15:28,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 10:15:28,298 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2018-09-30 10:15:28,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:28,300 INFO L225 Difference]: With dead ends: 631 [2018-09-30 10:15:28,300 INFO L226 Difference]: Without dead ends: 629 [2018-09-30 10:15:28,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:15:28,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2018-09-30 10:15:28,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 403. [2018-09-30 10:15:28,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2018-09-30 10:15:28,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 685 transitions. [2018-09-30 10:15:28,381 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 685 transitions. Word has length 12 [2018-09-30 10:15:28,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:28,382 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 685 transitions. [2018-09-30 10:15:28,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:15:28,382 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 685 transitions. [2018-09-30 10:15:28,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:15:28,383 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:28,383 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:28,383 INFO L423 AbstractCegarLoop]: === Iteration 20 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:28,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:28,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1000080215, now seen corresponding path program 1 times [2018-09-30 10:15:28,384 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:28,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:28,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:28,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:28,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:28,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:28,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:28,554 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:28,554 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:15:28,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:28,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:28,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:28,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:28,657 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:15:28,657 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2018-09-30 10:15:28,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:15:28,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:15:28,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:15:28,658 INFO L87 Difference]: Start difference. First operand 403 states and 685 transitions. Second operand 14 states. [2018-09-30 10:15:30,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:30,807 INFO L93 Difference]: Finished difference Result 1330 states and 2225 transitions. [2018-09-30 10:15:30,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 10:15:30,808 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 10:15:30,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:30,811 INFO L225 Difference]: With dead ends: 1330 [2018-09-30 10:15:30,811 INFO L226 Difference]: Without dead ends: 929 [2018-09-30 10:15:30,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=660, Invalid=3122, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 10:15:30,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2018-09-30 10:15:30,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 694. [2018-09-30 10:15:30,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 694 states. [2018-09-30 10:15:30,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1171 transitions. [2018-09-30 10:15:30,923 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1171 transitions. Word has length 13 [2018-09-30 10:15:30,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:30,923 INFO L480 AbstractCegarLoop]: Abstraction has 694 states and 1171 transitions. [2018-09-30 10:15:30,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:15:30,923 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1171 transitions. [2018-09-30 10:15:30,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:15:30,924 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:30,924 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:30,924 INFO L423 AbstractCegarLoop]: === Iteration 21 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:30,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:30,925 INFO L82 PathProgramCache]: Analyzing trace with hash -86603521, now seen corresponding path program 1 times [2018-09-30 10:15:30,925 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:30,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:30,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:30,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:30,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:30,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:31,011 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:31,011 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 [2018-09-30 10:15:31,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:31,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:31,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:31,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:31,194 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:31,194 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-09-30 10:15:31,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:15:31,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:15:31,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:15:31,195 INFO L87 Difference]: Start difference. First operand 694 states and 1171 transitions. Second operand 14 states. [2018-09-30 10:15:32,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:32,344 INFO L93 Difference]: Finished difference Result 1557 states and 2604 transitions. [2018-09-30 10:15:32,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 10:15:32,344 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 10:15:32,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:32,347 INFO L225 Difference]: With dead ends: 1557 [2018-09-30 10:15:32,348 INFO L226 Difference]: Without dead ends: 864 [2018-09-30 10:15:32,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:15:32,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2018-09-30 10:15:32,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 741. [2018-09-30 10:15:32,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 741 states. [2018-09-30 10:15:32,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1247 transitions. [2018-09-30 10:15:32,485 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1247 transitions. Word has length 13 [2018-09-30 10:15:32,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:32,485 INFO L480 AbstractCegarLoop]: Abstraction has 741 states and 1247 transitions. [2018-09-30 10:15:32,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:15:32,486 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1247 transitions. [2018-09-30 10:15:32,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:15:32,486 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:32,486 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:32,487 INFO L423 AbstractCegarLoop]: === Iteration 22 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:32,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:32,487 INFO L82 PathProgramCache]: Analyzing trace with hash -63701769, now seen corresponding path program 1 times [2018-09-30 10:15:32,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:32,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:32,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:32,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:32,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:32,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:32,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:32,584 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:32,584 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 [2018-09-30 10:15:32,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:32,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:32,736 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:32,736 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2018-09-30 10:15:32,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:15:32,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:15:32,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:15:32,737 INFO L87 Difference]: Start difference. First operand 741 states and 1247 transitions. Second operand 13 states. [2018-09-30 10:15:33,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:33,718 INFO L93 Difference]: Finished difference Result 1655 states and 2757 transitions. [2018-09-30 10:15:33,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 10:15:33,720 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-30 10:15:33,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:33,725 INFO L225 Difference]: With dead ends: 1655 [2018-09-30 10:15:33,725 INFO L226 Difference]: Without dead ends: 915 [2018-09-30 10:15:33,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:15:33,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2018-09-30 10:15:33,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 809. [2018-09-30 10:15:33,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 809 states. [2018-09-30 10:15:33,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 1353 transitions. [2018-09-30 10:15:33,860 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 1353 transitions. Word has length 13 [2018-09-30 10:15:33,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:33,860 INFO L480 AbstractCegarLoop]: Abstraction has 809 states and 1353 transitions. [2018-09-30 10:15:33,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:15:33,860 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 1353 transitions. [2018-09-30 10:15:33,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:15:33,861 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:33,861 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:33,862 INFO L423 AbstractCegarLoop]: === Iteration 23 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:33,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:33,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1761298639, now seen corresponding path program 1 times [2018-09-30 10:15:33,862 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:33,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:33,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:33,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:33,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:33,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:33,976 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:33,976 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:33,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:33,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:34,046 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:34,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-09-30 10:15:34,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:15:34,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:15:34,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:15:34,047 INFO L87 Difference]: Start difference. First operand 809 states and 1353 transitions. Second operand 10 states. [2018-09-30 10:15:34,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:34,910 INFO L93 Difference]: Finished difference Result 939 states and 1541 transitions. [2018-09-30 10:15:34,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 10:15:34,910 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2018-09-30 10:15:34,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:34,914 INFO L225 Difference]: With dead ends: 939 [2018-09-30 10:15:34,914 INFO L226 Difference]: Without dead ends: 937 [2018-09-30 10:15:34,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2018-09-30 10:15:34,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2018-09-30 10:15:35,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 820. [2018-09-30 10:15:35,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 820 states. [2018-09-30 10:15:35,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1367 transitions. [2018-09-30 10:15:35,044 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1367 transitions. Word has length 13 [2018-09-30 10:15:35,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:35,044 INFO L480 AbstractCegarLoop]: Abstraction has 820 states and 1367 transitions. [2018-09-30 10:15:35,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:15:35,044 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1367 transitions. [2018-09-30 10:15:35,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:15:35,045 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:35,045 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:35,045 INFO L423 AbstractCegarLoop]: === Iteration 24 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:35,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:35,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1799471129, now seen corresponding path program 1 times [2018-09-30 10:15:35,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:35,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:35,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:35,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:35,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:35,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:35,136 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:35,136 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:15:35,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:35,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:35,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:35,550 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:15:35,550 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2018-09-30 10:15:35,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:15:35,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:15:35,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:15:35,551 INFO L87 Difference]: Start difference. First operand 820 states and 1367 transitions. Second operand 14 states. [2018-09-30 10:15:37,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:37,524 INFO L93 Difference]: Finished difference Result 2058 states and 3403 transitions. [2018-09-30 10:15:37,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 10:15:37,524 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 10:15:37,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:37,529 INFO L225 Difference]: With dead ends: 2058 [2018-09-30 10:15:37,529 INFO L226 Difference]: Without dead ends: 1239 [2018-09-30 10:15:37,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=436, Invalid=2426, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:15:37,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2018-09-30 10:15:37,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 899. [2018-09-30 10:15:37,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2018-09-30 10:15:37,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1500 transitions. [2018-09-30 10:15:37,683 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1500 transitions. Word has length 13 [2018-09-30 10:15:37,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:37,683 INFO L480 AbstractCegarLoop]: Abstraction has 899 states and 1500 transitions. [2018-09-30 10:15:37,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:15:37,683 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1500 transitions. [2018-09-30 10:15:37,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:15:37,684 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:37,684 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:37,684 INFO L423 AbstractCegarLoop]: === Iteration 25 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:37,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:37,684 INFO L82 PathProgramCache]: Analyzing trace with hash 267374077, now seen corresponding path program 1 times [2018-09-30 10:15:37,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:37,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:37,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:37,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:37,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:37,783 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:37,784 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:15:37,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:37,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:37,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:37,857 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:37,857 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-09-30 10:15:37,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:15:37,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:15:37,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:15:37,858 INFO L87 Difference]: Start difference. First operand 899 states and 1500 transitions. Second operand 10 states. [2018-09-30 10:15:38,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:38,636 INFO L93 Difference]: Finished difference Result 1038 states and 1712 transitions. [2018-09-30 10:15:38,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 10:15:38,636 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2018-09-30 10:15:38,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:38,640 INFO L225 Difference]: With dead ends: 1038 [2018-09-30 10:15:38,640 INFO L226 Difference]: Without dead ends: 1036 [2018-09-30 10:15:38,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2018-09-30 10:15:38,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2018-09-30 10:15:38,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 897. [2018-09-30 10:15:38,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2018-09-30 10:15:38,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1498 transitions. [2018-09-30 10:15:38,837 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1498 transitions. Word has length 13 [2018-09-30 10:15:38,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:38,837 INFO L480 AbstractCegarLoop]: Abstraction has 897 states and 1498 transitions. [2018-09-30 10:15:38,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:15:38,837 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1498 transitions. [2018-09-30 10:15:38,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:15:38,838 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:38,838 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:38,838 INFO L423 AbstractCegarLoop]: === Iteration 26 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:38,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:38,839 INFO L82 PathProgramCache]: Analyzing trace with hash 290277111, now seen corresponding path program 1 times [2018-09-30 10:15:38,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:38,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:38,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:38,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:38,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:38,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:38,938 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:38,938 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 [2018-09-30 10:15:38,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:38,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:38,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:39,116 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:15:39,116 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2018-09-30 10:15:39,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:15:39,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:15:39,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:15:39,117 INFO L87 Difference]: Start difference. First operand 897 states and 1498 transitions. Second operand 14 states. [2018-09-30 10:15:39,428 WARN L178 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 11 [2018-09-30 10:15:41,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:41,418 INFO L93 Difference]: Finished difference Result 2193 states and 3616 transitions. [2018-09-30 10:15:41,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 10:15:41,418 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 10:15:41,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:41,423 INFO L225 Difference]: With dead ends: 2193 [2018-09-30 10:15:41,423 INFO L226 Difference]: Without dead ends: 1286 [2018-09-30 10:15:41,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=445, Invalid=2525, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 10:15:41,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2018-09-30 10:15:41,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 995. [2018-09-30 10:15:41,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 995 states. [2018-09-30 10:15:41,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1646 transitions. [2018-09-30 10:15:41,615 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1646 transitions. Word has length 13 [2018-09-30 10:15:41,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:41,616 INFO L480 AbstractCegarLoop]: Abstraction has 995 states and 1646 transitions. [2018-09-30 10:15:41,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:15:41,616 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1646 transitions. [2018-09-30 10:15:41,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:15:41,616 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:41,617 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:41,617 INFO L423 AbstractCegarLoop]: === Iteration 27 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:41,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:41,617 INFO L82 PathProgramCache]: Analyzing trace with hash 2115278289, now seen corresponding path program 1 times [2018-09-30 10:15:41,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:41,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:41,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:41,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:41,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:41,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:41,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:41,791 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:41,791 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 [2018-09-30 10:15:41,800 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:41,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:41,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:41,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:41,927 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:41,928 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-09-30 10:15:41,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:15:41,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:15:41,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:15:41,928 INFO L87 Difference]: Start difference. First operand 995 states and 1646 transitions. Second operand 14 states. [2018-09-30 10:15:43,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:43,133 INFO L93 Difference]: Finished difference Result 2165 states and 3551 transitions. [2018-09-30 10:15:43,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 10:15:43,134 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 10:15:43,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:43,138 INFO L225 Difference]: With dead ends: 2165 [2018-09-30 10:15:43,138 INFO L226 Difference]: Without dead ends: 1153 [2018-09-30 10:15:43,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:15:43,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2018-09-30 10:15:43,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1001. [2018-09-30 10:15:43,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1001 states. [2018-09-30 10:15:43,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1642 transitions. [2018-09-30 10:15:43,306 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1642 transitions. Word has length 13 [2018-09-30 10:15:43,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:43,306 INFO L480 AbstractCegarLoop]: Abstraction has 1001 states and 1642 transitions. [2018-09-30 10:15:43,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:15:43,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1642 transitions. [2018-09-30 10:15:43,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:15:43,307 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:43,307 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:43,308 INFO L423 AbstractCegarLoop]: === Iteration 28 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:43,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:43,308 INFO L82 PathProgramCache]: Analyzing trace with hash -2141517287, now seen corresponding path program 1 times [2018-09-30 10:15:43,308 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:43,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:43,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:43,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:43,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:43,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:43,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:43,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:43,453 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 [2018-09-30 10:15:43,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:43,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:43,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:43,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:43,588 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:43,588 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2018-09-30 10:15:43,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:15:43,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:15:43,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:15:43,589 INFO L87 Difference]: Start difference. First operand 1001 states and 1642 transitions. Second operand 13 states. [2018-09-30 10:15:45,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:45,162 INFO L93 Difference]: Finished difference Result 1397 states and 2244 transitions. [2018-09-30 10:15:45,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 10:15:45,162 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-30 10:15:45,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:45,166 INFO L225 Difference]: With dead ends: 1397 [2018-09-30 10:15:45,166 INFO L226 Difference]: Without dead ends: 1125 [2018-09-30 10:15:45,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:15:45,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2018-09-30 10:15:45,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 995. [2018-09-30 10:15:45,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 995 states. [2018-09-30 10:15:45,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1627 transitions. [2018-09-30 10:15:45,340 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1627 transitions. Word has length 13 [2018-09-30 10:15:45,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:45,340 INFO L480 AbstractCegarLoop]: Abstraction has 995 states and 1627 transitions. [2018-09-30 10:15:45,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:15:45,340 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1627 transitions. [2018-09-30 10:15:45,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:15:45,341 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:45,341 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:45,341 INFO L423 AbstractCegarLoop]: === Iteration 29 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:45,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:45,341 INFO L82 PathProgramCache]: Analyzing trace with hash 2129075237, now seen corresponding path program 1 times [2018-09-30 10:15:45,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:45,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:45,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:45,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:45,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:45,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:45,416 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:45,416 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 [2018-09-30 10:15:45,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:45,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:45,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:45,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:45,531 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:15:45,531 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2018-09-30 10:15:45,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:15:45,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:15:45,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:15:45,532 INFO L87 Difference]: Start difference. First operand 995 states and 1627 transitions. Second operand 14 states. [2018-09-30 10:15:47,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:47,792 INFO L93 Difference]: Finished difference Result 2724 states and 4397 transitions. [2018-09-30 10:15:47,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 10:15:47,792 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 10:15:47,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:47,798 INFO L225 Difference]: With dead ends: 2724 [2018-09-30 10:15:47,798 INFO L226 Difference]: Without dead ends: 1719 [2018-09-30 10:15:47,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=660, Invalid=3122, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 10:15:47,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2018-09-30 10:15:48,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1241. [2018-09-30 10:15:48,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1241 states. [2018-09-30 10:15:48,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 2017 transitions. [2018-09-30 10:15:48,018 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 2017 transitions. Word has length 13 [2018-09-30 10:15:48,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:48,018 INFO L480 AbstractCegarLoop]: Abstraction has 1241 states and 2017 transitions. [2018-09-30 10:15:48,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:15:48,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 2017 transitions. [2018-09-30 10:15:48,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:15:48,019 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:48,019 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:48,019 INFO L423 AbstractCegarLoop]: === Iteration 30 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:48,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:48,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1374164806, now seen corresponding path program 1 times [2018-09-30 10:15:48,019 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:48,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:48,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:48,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:48,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:48,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:48,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:48,731 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:48,731 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 [2018-09-30 10:15:48,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:48,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:48,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:48,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:48,866 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:48,866 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2018-09-30 10:15:48,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:15:48,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:15:48,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:15:48,867 INFO L87 Difference]: Start difference. First operand 1241 states and 2017 transitions. Second operand 15 states. [2018-09-30 10:15:50,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:50,464 INFO L93 Difference]: Finished difference Result 1442 states and 2324 transitions. [2018-09-30 10:15:50,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 10:15:50,464 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-30 10:15:50,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:50,469 INFO L225 Difference]: With dead ends: 1442 [2018-09-30 10:15:50,469 INFO L226 Difference]: Without dead ends: 1440 [2018-09-30 10:15:50,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 10:15:50,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2018-09-30 10:15:50,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1225. [2018-09-30 10:15:50,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1225 states. [2018-09-30 10:15:50,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 1983 transitions. [2018-09-30 10:15:50,688 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 1983 transitions. Word has length 15 [2018-09-30 10:15:50,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:50,688 INFO L480 AbstractCegarLoop]: Abstraction has 1225 states and 1983 transitions. [2018-09-30 10:15:50,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:15:50,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 1983 transitions. [2018-09-30 10:15:50,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:15:50,689 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:50,689 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:50,689 INFO L423 AbstractCegarLoop]: === Iteration 31 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:50,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:50,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1511389740, now seen corresponding path program 1 times [2018-09-30 10:15:50,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:50,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:50,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:50,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:50,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:50,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:50,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:50,803 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:50,803 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 [2018-09-30 10:15:50,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:50,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:50,966 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:50,967 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2018-09-30 10:15:50,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 10:15:50,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 10:15:50,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:15:50,967 INFO L87 Difference]: Start difference. First operand 1225 states and 1983 transitions. Second operand 12 states. [2018-09-30 10:15:51,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:51,986 INFO L93 Difference]: Finished difference Result 1389 states and 2225 transitions. [2018-09-30 10:15:51,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 10:15:51,986 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2018-09-30 10:15:51,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:51,991 INFO L225 Difference]: With dead ends: 1389 [2018-09-30 10:15:51,991 INFO L226 Difference]: Without dead ends: 1387 [2018-09-30 10:15:51,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:15:51,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2018-09-30 10:15:52,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1211. [2018-09-30 10:15:52,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1211 states. [2018-09-30 10:15:52,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1953 transitions. [2018-09-30 10:15:52,215 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1953 transitions. Word has length 15 [2018-09-30 10:15:52,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:52,215 INFO L480 AbstractCegarLoop]: Abstraction has 1211 states and 1953 transitions. [2018-09-30 10:15:52,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 10:15:52,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1953 transitions. [2018-09-30 10:15:52,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 10:15:52,216 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:52,216 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:52,217 INFO L423 AbstractCegarLoop]: === Iteration 32 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:52,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:52,217 INFO L82 PathProgramCache]: Analyzing trace with hash -593242831, now seen corresponding path program 1 times [2018-09-30 10:15:52,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:52,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:52,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:52,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:52,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:52,288 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:52,288 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 [2018-09-30 10:15:52,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:52,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:52,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:52,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:52,406 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:52,406 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2018-09-30 10:15:52,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:15:52,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:15:52,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:15:52,407 INFO L87 Difference]: Start difference. First operand 1211 states and 1953 transitions. Second operand 14 states. [2018-09-30 10:15:54,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:54,073 INFO L93 Difference]: Finished difference Result 1445 states and 2303 transitions. [2018-09-30 10:15:54,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 10:15:54,074 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2018-09-30 10:15:54,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:54,080 INFO L225 Difference]: With dead ends: 1445 [2018-09-30 10:15:54,080 INFO L226 Difference]: Without dead ends: 1443 [2018-09-30 10:15:54,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=239, Invalid=1093, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 10:15:54,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2018-09-30 10:15:54,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1205. [2018-09-30 10:15:54,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1205 states. [2018-09-30 10:15:54,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1938 transitions. [2018-09-30 10:15:54,344 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1938 transitions. Word has length 16 [2018-09-30 10:15:54,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:54,344 INFO L480 AbstractCegarLoop]: Abstraction has 1205 states and 1938 transitions. [2018-09-30 10:15:54,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:15:54,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1938 transitions. [2018-09-30 10:15:54,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 10:15:54,345 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:54,345 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:54,345 INFO L423 AbstractCegarLoop]: === Iteration 33 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:54,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:54,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1223170690, now seen corresponding path program 1 times [2018-09-30 10:15:54,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:54,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:54,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:54,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:54,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:54,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:54,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:54,467 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 [2018-09-30 10:15:54,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:54,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:54,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:54,611 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:54,611 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2018-09-30 10:15:54,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 10:15:54,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 10:15:54,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:15:54,612 INFO L87 Difference]: Start difference. First operand 1205 states and 1938 transitions. Second operand 12 states. [2018-09-30 10:15:56,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:56,181 INFO L93 Difference]: Finished difference Result 1420 states and 2265 transitions. [2018-09-30 10:15:56,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 10:15:56,181 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2018-09-30 10:15:56,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:56,186 INFO L225 Difference]: With dead ends: 1420 [2018-09-30 10:15:56,186 INFO L226 Difference]: Without dead ends: 1418 [2018-09-30 10:15:56,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 10:15:56,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2018-09-30 10:15:56,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1213. [2018-09-30 10:15:56,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1213 states. [2018-09-30 10:15:56,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1951 transitions. [2018-09-30 10:15:56,424 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1951 transitions. Word has length 16 [2018-09-30 10:15:56,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:56,424 INFO L480 AbstractCegarLoop]: Abstraction has 1213 states and 1951 transitions. [2018-09-30 10:15:56,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 10:15:56,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1951 transitions. [2018-09-30 10:15:56,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 10:15:56,425 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:56,425 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:56,425 INFO L423 AbstractCegarLoop]: === Iteration 34 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:56,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:56,426 INFO L82 PathProgramCache]: Analyzing trace with hash -767609008, now seen corresponding path program 2 times [2018-09-30 10:15:56,426 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:56,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:56,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:56,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:56,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:56,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:56,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:56,497 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:56,497 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 [2018-09-30 10:15:56,507 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:15:56,519 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:15:56,519 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:15:56,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:56,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:56,579 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:56,579 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-09-30 10:15:56,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:15:56,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:15:56,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:15:56,580 INFO L87 Difference]: Start difference. First operand 1213 states and 1951 transitions. Second operand 11 states. [2018-09-30 10:15:57,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:57,469 INFO L93 Difference]: Finished difference Result 1334 states and 2129 transitions. [2018-09-30 10:15:57,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 10:15:57,469 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2018-09-30 10:15:57,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:57,474 INFO L225 Difference]: With dead ends: 1334 [2018-09-30 10:15:57,474 INFO L226 Difference]: Without dead ends: 1332 [2018-09-30 10:15:57,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2018-09-30 10:15:57,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2018-09-30 10:15:57,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 1205. [2018-09-30 10:15:57,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1205 states. [2018-09-30 10:15:57,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1938 transitions. [2018-09-30 10:15:57,706 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1938 transitions. Word has length 16 [2018-09-30 10:15:57,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:57,706 INFO L480 AbstractCegarLoop]: Abstraction has 1205 states and 1938 transitions. [2018-09-30 10:15:57,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:15:57,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1938 transitions. [2018-09-30 10:15:57,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 10:15:57,707 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:57,707 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:57,708 INFO L423 AbstractCegarLoop]: === Iteration 35 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:57,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:57,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1823106549, now seen corresponding path program 1 times [2018-09-30 10:15:57,708 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:57,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:57,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:57,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:15:57,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:57,780 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:57,781 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 [2018-09-30 10:15:57,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:57,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:57,905 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:57,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-09-30 10:15:57,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:15:57,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:15:57,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:15:57,907 INFO L87 Difference]: Start difference. First operand 1205 states and 1938 transitions. Second operand 11 states. [2018-09-30 10:15:58,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:58,768 INFO L93 Difference]: Finished difference Result 1330 states and 2118 transitions. [2018-09-30 10:15:58,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 10:15:58,768 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2018-09-30 10:15:58,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:58,774 INFO L225 Difference]: With dead ends: 1330 [2018-09-30 10:15:58,774 INFO L226 Difference]: Without dead ends: 1328 [2018-09-30 10:15:58,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2018-09-30 10:15:58,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2018-09-30 10:15:59,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1211. [2018-09-30 10:15:59,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1211 states. [2018-09-30 10:15:59,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1948 transitions. [2018-09-30 10:15:59,019 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1948 transitions. Word has length 16 [2018-09-30 10:15:59,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:59,019 INFO L480 AbstractCegarLoop]: Abstraction has 1211 states and 1948 transitions. [2018-09-30 10:15:59,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:15:59,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1948 transitions. [2018-09-30 10:15:59,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 10:15:59,020 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:59,020 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:59,021 INFO L423 AbstractCegarLoop]: === Iteration 36 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:59,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:59,021 INFO L82 PathProgramCache]: Analyzing trace with hash 481081049, now seen corresponding path program 2 times [2018-09-30 10:15:59,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:59,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:59,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:59,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:59,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:59,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:59,128 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:59,128 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 [2018-09-30 10:15:59,136 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:15:59,142 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:15:59,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:15:59,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:59,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:59,245 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:59,245 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2018-09-30 10:15:59,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 10:15:59,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 10:15:59,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:15:59,246 INFO L87 Difference]: Start difference. First operand 1211 states and 1948 transitions. Second operand 12 states. [2018-09-30 10:16:00,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:00,694 INFO L93 Difference]: Finished difference Result 1430 states and 2273 transitions. [2018-09-30 10:16:00,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 10:16:00,695 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2018-09-30 10:16:00,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:00,699 INFO L225 Difference]: With dead ends: 1430 [2018-09-30 10:16:00,700 INFO L226 Difference]: Without dead ends: 1428 [2018-09-30 10:16:00,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 10:16:00,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2018-09-30 10:16:00,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1205. [2018-09-30 10:16:00,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1205 states. [2018-09-30 10:16:00,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1938 transitions. [2018-09-30 10:16:00,941 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1938 transitions. Word has length 16 [2018-09-30 10:16:00,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:00,941 INFO L480 AbstractCegarLoop]: Abstraction has 1205 states and 1938 transitions. [2018-09-30 10:16:00,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 10:16:00,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1938 transitions. [2018-09-30 10:16:00,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 10:16:00,942 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:00,942 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:16:00,942 INFO L423 AbstractCegarLoop]: === Iteration 37 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:00,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:00,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1936399254, now seen corresponding path program 1 times [2018-09-30 10:16:00,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:00,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:00,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:00,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:00,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:01,332 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:01,332 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:01,332 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 [2018-09-30 10:16:01,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:01,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:01,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:01,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:01,428 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:01,429 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2018-09-30 10:16:01,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:16:01,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:16:01,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:16:01,429 INFO L87 Difference]: Start difference. First operand 1205 states and 1938 transitions. Second operand 13 states. [2018-09-30 10:16:03,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:03,190 INFO L93 Difference]: Finished difference Result 1432 states and 2278 transitions. [2018-09-30 10:16:03,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 10:16:03,190 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2018-09-30 10:16:03,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:03,193 INFO L225 Difference]: With dead ends: 1432 [2018-09-30 10:16:03,193 INFO L226 Difference]: Without dead ends: 1430 [2018-09-30 10:16:03,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=230, Invalid=1030, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:16:03,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2018-09-30 10:16:03,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1199. [2018-09-30 10:16:03,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1199 states. [2018-09-30 10:16:03,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1923 transitions. [2018-09-30 10:16:03,507 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1923 transitions. Word has length 16 [2018-09-30 10:16:03,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:03,508 INFO L480 AbstractCegarLoop]: Abstraction has 1199 states and 1923 transitions. [2018-09-30 10:16:03,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:16:03,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1923 transitions. [2018-09-30 10:16:03,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:16:03,509 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:03,509 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:16:03,509 INFO L423 AbstractCegarLoop]: === Iteration 38 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:03,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:03,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1085218294, now seen corresponding path program 1 times [2018-09-30 10:16:03,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:03,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:03,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:03,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:03,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:04,156 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:04,156 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 [2018-09-30 10:16:04,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:04,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:04,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:04,260 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:16:04,260 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 17 [2018-09-30 10:16:04,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 10:16:04,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 10:16:04,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:16:04,261 INFO L87 Difference]: Start difference. First operand 1199 states and 1923 transitions. Second operand 17 states. [2018-09-30 10:16:06,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:06,926 INFO L93 Difference]: Finished difference Result 1695 states and 2653 transitions. [2018-09-30 10:16:06,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 10:16:06,927 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2018-09-30 10:16:06,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:06,929 INFO L225 Difference]: With dead ends: 1695 [2018-09-30 10:16:06,929 INFO L226 Difference]: Without dead ends: 1376 [2018-09-30 10:16:06,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1592 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=596, Invalid=4660, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 10:16:06,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2018-09-30 10:16:07,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1028. [2018-09-30 10:16:07,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1028 states. [2018-09-30 10:16:07,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1643 transitions. [2018-09-30 10:16:07,137 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1643 transitions. Word has length 18 [2018-09-30 10:16:07,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:07,137 INFO L480 AbstractCegarLoop]: Abstraction has 1028 states and 1643 transitions. [2018-09-30 10:16:07,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 10:16:07,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1643 transitions. [2018-09-30 10:16:07,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:16:07,138 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:07,139 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:16:07,139 INFO L423 AbstractCegarLoop]: === Iteration 39 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:07,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:07,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1597439053, now seen corresponding path program 1 times [2018-09-30 10:16:07,139 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:07,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:07,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:07,140 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:07,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:07,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:07,275 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:07,275 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:16:07,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:07,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:07,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:07,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:07,435 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:07,436 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 16 [2018-09-30 10:16:07,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:16:07,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:16:07,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:16:07,436 INFO L87 Difference]: Start difference. First operand 1028 states and 1643 transitions. Second operand 16 states. [2018-09-30 10:16:09,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:09,467 INFO L93 Difference]: Finished difference Result 1514 states and 2354 transitions. [2018-09-30 10:16:09,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 10:16:09,472 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2018-09-30 10:16:09,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:09,474 INFO L225 Difference]: With dead ends: 1514 [2018-09-30 10:16:09,474 INFO L226 Difference]: Without dead ends: 1219 [2018-09-30 10:16:09,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=383, Invalid=2067, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:16:09,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2018-09-30 10:16:09,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1024. [2018-09-30 10:16:09,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2018-09-30 10:16:09,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1632 transitions. [2018-09-30 10:16:09,849 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1632 transitions. Word has length 18 [2018-09-30 10:16:09,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:09,850 INFO L480 AbstractCegarLoop]: Abstraction has 1024 states and 1632 transitions. [2018-09-30 10:16:09,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:16:09,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1632 transitions. [2018-09-30 10:16:09,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:16:09,851 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:09,851 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 10:16:09,851 INFO L423 AbstractCegarLoop]: === Iteration 40 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:09,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:09,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1672170852, now seen corresponding path program 1 times [2018-09-30 10:16:09,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:09,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:09,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:09,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:09,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:09,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:10,416 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 10:16:10,416 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:10,416 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 [2018-09-30 10:16:10,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:10,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:10,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:10,559 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:10,559 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2018-09-30 10:16:10,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:16:10,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:16:10,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:16:10,560 INFO L87 Difference]: Start difference. First operand 1024 states and 1632 transitions. Second operand 16 states. [2018-09-30 10:16:12,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:12,259 INFO L93 Difference]: Finished difference Result 2556 states and 4045 transitions. [2018-09-30 10:16:12,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 10:16:12,260 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2018-09-30 10:16:12,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:12,262 INFO L225 Difference]: With dead ends: 2556 [2018-09-30 10:16:12,262 INFO L226 Difference]: Without dead ends: 1529 [2018-09-30 10:16:12,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:16:12,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2018-09-30 10:16:12,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1073. [2018-09-30 10:16:12,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1073 states. [2018-09-30 10:16:12,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1703 transitions. [2018-09-30 10:16:12,530 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1703 transitions. Word has length 18 [2018-09-30 10:16:12,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:12,530 INFO L480 AbstractCegarLoop]: Abstraction has 1073 states and 1703 transitions. [2018-09-30 10:16:12,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:16:12,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1703 transitions. [2018-09-30 10:16:12,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:16:12,531 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:12,531 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:16:12,532 INFO L423 AbstractCegarLoop]: === Iteration 41 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:12,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:12,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1136854538, now seen corresponding path program 1 times [2018-09-30 10:16:12,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:12,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:12,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:12,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:12,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:12,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:12,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:12,620 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:12,621 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 [2018-09-30 10:16:12,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:12,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:12,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:12,752 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:12,752 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2018-09-30 10:16:12,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:16:12,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:16:12,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:16:12,753 INFO L87 Difference]: Start difference. First operand 1073 states and 1703 transitions. Second operand 15 states. [2018-09-30 10:16:14,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:14,350 INFO L93 Difference]: Finished difference Result 1546 states and 2389 transitions. [2018-09-30 10:16:14,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 10:16:14,350 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2018-09-30 10:16:14,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:14,353 INFO L225 Difference]: With dead ends: 1546 [2018-09-30 10:16:14,353 INFO L226 Difference]: Without dead ends: 1291 [2018-09-30 10:16:14,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 10:16:14,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2018-09-30 10:16:14,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 1056. [2018-09-30 10:16:14,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1056 states. [2018-09-30 10:16:14,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1674 transitions. [2018-09-30 10:16:14,677 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1674 transitions. Word has length 18 [2018-09-30 10:16:14,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:14,677 INFO L480 AbstractCegarLoop]: Abstraction has 1056 states and 1674 transitions. [2018-09-30 10:16:14,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:16:14,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1674 transitions. [2018-09-30 10:16:14,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:16:14,678 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:14,678 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:16:14,678 INFO L423 AbstractCegarLoop]: === Iteration 42 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:14,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:14,679 INFO L82 PathProgramCache]: Analyzing trace with hash 975863549, now seen corresponding path program 1 times [2018-09-30 10:16:14,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:14,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:14,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:14,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:14,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:14,746 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:14,746 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 [2018-09-30 10:16:14,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:14,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:14,787 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:14,787 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:16:14,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:16:14,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:16:14,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:16:14,788 INFO L87 Difference]: Start difference. First operand 1056 states and 1674 transitions. Second operand 7 states. [2018-09-30 10:16:15,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:15,551 INFO L93 Difference]: Finished difference Result 1635 states and 2515 transitions. [2018-09-30 10:16:15,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 10:16:15,551 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2018-09-30 10:16:15,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:15,554 INFO L225 Difference]: With dead ends: 1635 [2018-09-30 10:16:15,554 INFO L226 Difference]: Without dead ends: 1494 [2018-09-30 10:16:15,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:16:15,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2018-09-30 10:16:15,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1094. [2018-09-30 10:16:15,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1094 states. [2018-09-30 10:16:15,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1728 transitions. [2018-09-30 10:16:15,886 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1728 transitions. Word has length 18 [2018-09-30 10:16:15,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:15,886 INFO L480 AbstractCegarLoop]: Abstraction has 1094 states and 1728 transitions. [2018-09-30 10:16:15,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:16:15,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1728 transitions. [2018-09-30 10:16:15,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 10:16:15,887 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:15,887 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:16:15,887 INFO L423 AbstractCegarLoop]: === Iteration 43 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:15,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:15,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1152261854, now seen corresponding path program 1 times [2018-09-30 10:16:15,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:15,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:15,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:15,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:15,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:15,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:16,021 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:16,022 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:16,022 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:16:16,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:16,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:16,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:16,106 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:16,127 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:16,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 16 [2018-09-30 10:16:16,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 10:16:16,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 10:16:16,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:16:16,128 INFO L87 Difference]: Start difference. First operand 1094 states and 1728 transitions. Second operand 17 states. [2018-09-30 10:16:19,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:19,581 INFO L93 Difference]: Finished difference Result 2230 states and 3534 transitions. [2018-09-30 10:16:19,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 10:16:19,581 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2018-09-30 10:16:19,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:19,587 INFO L225 Difference]: With dead ends: 2230 [2018-09-30 10:16:19,587 INFO L226 Difference]: Without dead ends: 2180 [2018-09-30 10:16:19,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2121 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1477, Invalid=4529, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 10:16:19,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2018-09-30 10:16:20,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 1150. [2018-09-30 10:16:20,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1150 states. [2018-09-30 10:16:20,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1853 transitions. [2018-09-30 10:16:20,015 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1853 transitions. Word has length 20 [2018-09-30 10:16:20,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:20,015 INFO L480 AbstractCegarLoop]: Abstraction has 1150 states and 1853 transitions. [2018-09-30 10:16:20,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 10:16:20,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1853 transitions. [2018-09-30 10:16:20,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 10:16:20,017 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:20,017 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 10:16:20,017 INFO L423 AbstractCegarLoop]: === Iteration 44 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:20,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:20,017 INFO L82 PathProgramCache]: Analyzing trace with hash -79326665, now seen corresponding path program 1 times [2018-09-30 10:16:20,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:20,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:20,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:20,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:20,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:20,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:20,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 10:16:20,124 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:20,124 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:16:20,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:20,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:20,144 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 10:16:20,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:20,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:16:20,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:16:20,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:16:20,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:16:20,164 INFO L87 Difference]: Start difference. First operand 1150 states and 1853 transitions. Second operand 7 states. [2018-09-30 10:16:20,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:20,741 INFO L93 Difference]: Finished difference Result 1760 states and 2751 transitions. [2018-09-30 10:16:20,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:16:20,742 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2018-09-30 10:16:20,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:20,745 INFO L225 Difference]: With dead ends: 1760 [2018-09-30 10:16:20,745 INFO L226 Difference]: Without dead ends: 1507 [2018-09-30 10:16:20,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:16:20,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2018-09-30 10:16:21,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1026. [2018-09-30 10:16:21,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1026 states. [2018-09-30 10:16:21,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1655 transitions. [2018-09-30 10:16:21,034 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1655 transitions. Word has length 20 [2018-09-30 10:16:21,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:21,034 INFO L480 AbstractCegarLoop]: Abstraction has 1026 states and 1655 transitions. [2018-09-30 10:16:21,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:16:21,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1655 transitions. [2018-09-30 10:16:21,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 10:16:21,035 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:21,035 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:16:21,035 INFO L423 AbstractCegarLoop]: === Iteration 45 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:21,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:21,035 INFO L82 PathProgramCache]: Analyzing trace with hash -79325383, now seen corresponding path program 1 times [2018-09-30 10:16:21,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:21,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:21,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:21,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:21,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:21,292 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:21,293 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:21,293 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 [2018-09-30 10:16:21,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:21,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:21,409 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:21,409 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2018-09-30 10:16:21,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:16:21,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:16:21,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:16:21,409 INFO L87 Difference]: Start difference. First operand 1026 states and 1655 transitions. Second operand 13 states. [2018-09-30 10:16:23,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:23,498 INFO L93 Difference]: Finished difference Result 1878 states and 3019 transitions. [2018-09-30 10:16:23,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 10:16:23,498 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2018-09-30 10:16:23,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:23,500 INFO L225 Difference]: With dead ends: 1878 [2018-09-30 10:16:23,501 INFO L226 Difference]: Without dead ends: 1729 [2018-09-30 10:16:23,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=392, Invalid=1090, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 10:16:23,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2018-09-30 10:16:23,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1013. [2018-09-30 10:16:23,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1013 states. [2018-09-30 10:16:23,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1646 transitions. [2018-09-30 10:16:23,846 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1646 transitions. Word has length 20 [2018-09-30 10:16:23,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:23,846 INFO L480 AbstractCegarLoop]: Abstraction has 1013 states and 1646 transitions. [2018-09-30 10:16:23,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:16:23,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1646 transitions. [2018-09-30 10:16:23,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 10:16:23,847 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:23,847 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 10:16:23,847 INFO L423 AbstractCegarLoop]: === Iteration 46 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:23,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:23,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1614386347, now seen corresponding path program 1 times [2018-09-30 10:16:23,847 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:23,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:23,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:23,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:23,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:23,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:23,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 10:16:23,962 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:23,962 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 [2018-09-30 10:16:23,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:23,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:23,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:24,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:24,179 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:24,180 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2018-09-30 10:16:24,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 10:16:24,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 10:16:24,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:16:24,180 INFO L87 Difference]: Start difference. First operand 1013 states and 1646 transitions. Second operand 20 states. [2018-09-30 10:16:27,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:27,834 INFO L93 Difference]: Finished difference Result 2738 states and 4441 transitions. [2018-09-30 10:16:27,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 10:16:27,834 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 21 [2018-09-30 10:16:27,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:27,836 INFO L225 Difference]: With dead ends: 2738 [2018-09-30 10:16:27,836 INFO L226 Difference]: Without dead ends: 1726 [2018-09-30 10:16:27,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2615 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1197, Invalid=6813, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 10:16:27,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2018-09-30 10:16:28,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1481. [2018-09-30 10:16:28,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1481 states. [2018-09-30 10:16:28,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 2418 transitions. [2018-09-30 10:16:28,209 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 2418 transitions. Word has length 21 [2018-09-30 10:16:28,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:28,210 INFO L480 AbstractCegarLoop]: Abstraction has 1481 states and 2418 transitions. [2018-09-30 10:16:28,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 10:16:28,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 2418 transitions. [2018-09-30 10:16:28,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 10:16:28,210 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:28,211 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:16:28,211 INFO L423 AbstractCegarLoop]: === Iteration 47 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:28,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:28,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1615679213, now seen corresponding path program 1 times [2018-09-30 10:16:28,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:28,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:28,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:28,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:28,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:28,328 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:28,329 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 [2018-09-30 10:16:28,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:28,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:28,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:28,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:28,487 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:28,487 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2018-09-30 10:16:28,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 10:16:28,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 10:16:28,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:16:28,487 INFO L87 Difference]: Start difference. First operand 1481 states and 2418 transitions. Second operand 18 states. [2018-09-30 10:16:32,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:32,710 INFO L93 Difference]: Finished difference Result 2759 states and 4491 transitions. [2018-09-30 10:16:32,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 10:16:32,710 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2018-09-30 10:16:32,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:32,712 INFO L225 Difference]: With dead ends: 2759 [2018-09-30 10:16:32,713 INFO L226 Difference]: Without dead ends: 2757 [2018-09-30 10:16:32,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=899, Invalid=4503, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 10:16:32,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2018-09-30 10:16:33,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 1886. [2018-09-30 10:16:33,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1886 states. [2018-09-30 10:16:33,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 3096 transitions. [2018-09-30 10:16:33,131 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 3096 transitions. Word has length 21 [2018-09-30 10:16:33,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:33,131 INFO L480 AbstractCegarLoop]: Abstraction has 1886 states and 3096 transitions. [2018-09-30 10:16:33,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 10:16:33,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 3096 transitions. [2018-09-30 10:16:33,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 10:16:33,132 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:33,132 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:16:33,132 INFO L423 AbstractCegarLoop]: === Iteration 48 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:33,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:33,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1336385522, now seen corresponding path program 1 times [2018-09-30 10:16:33,133 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:33,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:33,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:33,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:33,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:33,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:33,582 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:33,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:16:33,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:33,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:33,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:33,726 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:33,726 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2018-09-30 10:16:33,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:16:33,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:16:33,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:16:33,727 INFO L87 Difference]: Start difference. First operand 1886 states and 3096 transitions. Second operand 16 states. [2018-09-30 10:16:37,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:37,277 INFO L93 Difference]: Finished difference Result 2657 states and 4320 transitions. [2018-09-30 10:16:37,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 10:16:37,277 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2018-09-30 10:16:37,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:37,279 INFO L225 Difference]: With dead ends: 2657 [2018-09-30 10:16:37,279 INFO L226 Difference]: Without dead ends: 2655 [2018-09-30 10:16:37,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=659, Invalid=2647, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:16:37,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2018-09-30 10:16:37,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 1726. [2018-09-30 10:16:37,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1726 states. [2018-09-30 10:16:37,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 2827 transitions. [2018-09-30 10:16:37,693 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 2827 transitions. Word has length 21 [2018-09-30 10:16:37,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:37,693 INFO L480 AbstractCegarLoop]: Abstraction has 1726 states and 2827 transitions. [2018-09-30 10:16:37,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:16:37,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 2827 transitions. [2018-09-30 10:16:37,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 10:16:37,694 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:37,694 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:16:37,694 INFO L423 AbstractCegarLoop]: === Iteration 49 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:37,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:37,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1327798635, now seen corresponding path program 1 times [2018-09-30 10:16:37,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:37,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:37,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:37,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:37,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:37,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:37,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:37,804 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:37,804 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:16:37,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:37,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:37,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:37,974 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:37,974 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2018-09-30 10:16:37,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 10:16:37,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 10:16:37,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:16:37,975 INFO L87 Difference]: Start difference. First operand 1726 states and 2827 transitions. Second operand 17 states. [2018-09-30 10:16:41,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:41,867 INFO L93 Difference]: Finished difference Result 2434 states and 3937 transitions. [2018-09-30 10:16:41,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 10:16:41,868 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2018-09-30 10:16:41,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:41,870 INFO L225 Difference]: With dead ends: 2434 [2018-09-30 10:16:41,870 INFO L226 Difference]: Without dead ends: 2432 [2018-09-30 10:16:41,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=632, Invalid=3150, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 10:16:41,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2018-09-30 10:16:42,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 1872. [2018-09-30 10:16:42,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1872 states. [2018-09-30 10:16:42,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 3060 transitions. [2018-09-30 10:16:42,368 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 3060 transitions. Word has length 21 [2018-09-30 10:16:42,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:42,368 INFO L480 AbstractCegarLoop]: Abstraction has 1872 states and 3060 transitions. [2018-09-30 10:16:42,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 10:16:42,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 3060 transitions. [2018-09-30 10:16:42,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 10:16:42,369 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:42,369 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:16:42,370 INFO L423 AbstractCegarLoop]: === Iteration 50 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:42,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:42,370 INFO L82 PathProgramCache]: Analyzing trace with hash 133649308, now seen corresponding path program 2 times [2018-09-30 10:16:42,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:42,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:42,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:42,370 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:42,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:42,471 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:42,471 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 [2018-09-30 10:16:42,480 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:16:42,489 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:16:42,489 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:42,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:42,562 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 10:16:42,585 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:42,585 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 16 [2018-09-30 10:16:42,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:16:42,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:16:42,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:16:42,586 INFO L87 Difference]: Start difference. First operand 1872 states and 3060 transitions. Second operand 16 states. [2018-09-30 10:16:45,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:45,406 INFO L93 Difference]: Finished difference Result 2526 states and 4072 transitions. [2018-09-30 10:16:45,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 10:16:45,407 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2018-09-30 10:16:45,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:45,409 INFO L225 Difference]: With dead ends: 2526 [2018-09-30 10:16:45,409 INFO L226 Difference]: Without dead ends: 2334 [2018-09-30 10:16:45,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=543, Invalid=2763, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:16:45,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2018-09-30 10:16:45,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 2001. [2018-09-30 10:16:45,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2001 states. [2018-09-30 10:16:45,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 3219 transitions. [2018-09-30 10:16:45,909 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 3219 transitions. Word has length 21 [2018-09-30 10:16:45,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:45,910 INFO L480 AbstractCegarLoop]: Abstraction has 2001 states and 3219 transitions. [2018-09-30 10:16:45,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:16:45,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 3219 transitions. [2018-09-30 10:16:45,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 10:16:45,910 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:45,911 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:16:45,911 INFO L423 AbstractCegarLoop]: === Iteration 51 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:45,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:45,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1958649716, now seen corresponding path program 1 times [2018-09-30 10:16:45,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:45,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:45,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:45,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:45,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:45,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:46,044 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:46,045 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:46,045 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 [2018-09-30 10:16:46,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:46,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:46,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:46,494 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:46,530 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:46,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-09-30 10:16:46,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 10:16:46,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 10:16:46,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:16:46,531 INFO L87 Difference]: Start difference. First operand 2001 states and 3219 transitions. Second operand 18 states. [2018-09-30 10:16:52,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:52,073 INFO L93 Difference]: Finished difference Result 2607 states and 4131 transitions. [2018-09-30 10:16:52,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 10:16:52,073 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2018-09-30 10:16:52,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:52,076 INFO L225 Difference]: With dead ends: 2607 [2018-09-30 10:16:52,076 INFO L226 Difference]: Without dead ends: 2605 [2018-09-30 10:16:52,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1198, Invalid=4808, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 10:16:52,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2018-09-30 10:16:52,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 1559. [2018-09-30 10:16:52,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1559 states. [2018-09-30 10:16:52,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 2486 transitions. [2018-09-30 10:16:52,517 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 2486 transitions. Word has length 21 [2018-09-30 10:16:52,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:52,517 INFO L480 AbstractCegarLoop]: Abstraction has 1559 states and 2486 transitions. [2018-09-30 10:16:52,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 10:16:52,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 2486 transitions. [2018-09-30 10:16:52,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 10:16:52,518 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:52,518 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:16:52,518 INFO L423 AbstractCegarLoop]: === Iteration 52 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:52,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:52,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1950062829, now seen corresponding path program 1 times [2018-09-30 10:16:52,519 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:52,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:52,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:52,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:52,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:52,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:52,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:52,881 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:52,881 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 [2018-09-30 10:16:52,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:52,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:52,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:53,043 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:53,063 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:53,064 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2018-09-30 10:16:53,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 10:16:53,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 10:16:53,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:16:53,064 INFO L87 Difference]: Start difference. First operand 1559 states and 2486 transitions. Second operand 18 states. [2018-09-30 10:16:58,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:58,281 INFO L93 Difference]: Finished difference Result 2107 states and 3306 transitions. [2018-09-30 10:16:58,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 10:16:58,281 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2018-09-30 10:16:58,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:58,283 INFO L225 Difference]: With dead ends: 2107 [2018-09-30 10:16:58,283 INFO L226 Difference]: Without dead ends: 2105 [2018-09-30 10:16:58,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1282, Invalid=6200, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 10:16:58,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2018-09-30 10:16:58,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 1432. [2018-09-30 10:16:58,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1432 states. [2018-09-30 10:16:58,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 2283 transitions. [2018-09-30 10:16:58,696 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 2283 transitions. Word has length 21 [2018-09-30 10:16:58,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:58,696 INFO L480 AbstractCegarLoop]: Abstraction has 1432 states and 2283 transitions. [2018-09-30 10:16:58,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 10:16:58,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 2283 transitions. [2018-09-30 10:16:58,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 10:16:58,697 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:58,697 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:16:58,697 INFO L423 AbstractCegarLoop]: === Iteration 53 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:58,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:58,698 INFO L82 PathProgramCache]: Analyzing trace with hash 830618954, now seen corresponding path program 2 times [2018-09-30 10:16:58,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:58,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:58,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:58,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:58,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:58,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:58,801 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:58,801 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 [2018-09-30 10:16:58,809 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:16:58,819 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:16:58,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:58,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:58,884 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 10:16:58,904 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:58,904 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2018-09-30 10:16:58,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:16:58,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:16:58,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:16:58,905 INFO L87 Difference]: Start difference. First operand 1432 states and 2283 transitions. Second operand 15 states. [2018-09-30 10:17:02,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:02,006 INFO L93 Difference]: Finished difference Result 1886 states and 2991 transitions. [2018-09-30 10:17:02,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 10:17:02,006 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2018-09-30 10:17:02,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:02,008 INFO L225 Difference]: With dead ends: 1886 [2018-09-30 10:17:02,008 INFO L226 Difference]: Without dead ends: 1884 [2018-09-30 10:17:02,009 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=644, Invalid=3138, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 10:17:02,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2018-09-30 10:17:02,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1404. [2018-09-30 10:17:02,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1404 states. [2018-09-30 10:17:02,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 2237 transitions. [2018-09-30 10:17:02,435 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 2237 transitions. Word has length 21 [2018-09-30 10:17:02,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:02,435 INFO L480 AbstractCegarLoop]: Abstraction has 1404 states and 2237 transitions. [2018-09-30 10:17:02,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:17:02,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 2237 transitions. [2018-09-30 10:17:02,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 10:17:02,436 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:02,436 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 10:17:02,436 INFO L423 AbstractCegarLoop]: === Iteration 54 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:02,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:02,437 INFO L82 PathProgramCache]: Analyzing trace with hash 822030785, now seen corresponding path program 1 times [2018-09-30 10:17:02,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:02,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:02,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:02,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:17:02,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:02,556 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 10:17:02,557 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:02,557 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 [2018-09-30 10:17:02,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:17:02,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:02,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:02,733 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:02,753 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:02,753 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2018-09-30 10:17:02,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 10:17:02,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 10:17:02,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:17:02,754 INFO L87 Difference]: Start difference. First operand 1404 states and 2237 transitions. Second operand 20 states. [2018-09-30 10:17:07,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:07,656 INFO L93 Difference]: Finished difference Result 2676 states and 4218 transitions. [2018-09-30 10:17:07,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 10:17:07,656 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 21 [2018-09-30 10:17:07,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:07,658 INFO L225 Difference]: With dead ends: 2676 [2018-09-30 10:17:07,658 INFO L226 Difference]: Without dead ends: 1637 [2018-09-30 10:17:07,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2660 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1444, Invalid=7486, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 10:17:07,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2018-09-30 10:17:08,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1391. [2018-09-30 10:17:08,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1391 states. [2018-09-30 10:17:08,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 2209 transitions. [2018-09-30 10:17:08,085 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 2209 transitions. Word has length 21 [2018-09-30 10:17:08,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:08,085 INFO L480 AbstractCegarLoop]: Abstraction has 1391 states and 2209 transitions. [2018-09-30 10:17:08,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 10:17:08,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 2209 transitions. [2018-09-30 10:17:08,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 10:17:08,086 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:08,086 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:17:08,086 INFO L423 AbstractCegarLoop]: === Iteration 55 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:08,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:08,087 INFO L82 PathProgramCache]: Analyzing trace with hash 822032067, now seen corresponding path program 2 times [2018-09-30 10:17:08,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:08,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:08,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:08,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:17:08,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:08,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:08,185 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:08,185 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 [2018-09-30 10:17:08,193 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:17:08,201 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:17:08,201 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:17:08,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:08,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 10:17:08,344 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:08,345 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 17 [2018-09-30 10:17:08,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 10:17:08,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 10:17:08,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:17:08,345 INFO L87 Difference]: Start difference. First operand 1391 states and 2209 transitions. Second operand 18 states. [2018-09-30 10:17:12,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:12,812 INFO L93 Difference]: Finished difference Result 2169 states and 3390 transitions. [2018-09-30 10:17:12,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 10:17:12,812 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2018-09-30 10:17:12,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:12,814 INFO L225 Difference]: With dead ends: 2169 [2018-09-30 10:17:12,814 INFO L226 Difference]: Without dead ends: 2167 [2018-09-30 10:17:12,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2313 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1116, Invalid=5856, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 10:17:12,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2018-09-30 10:17:13,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 1375. [2018-09-30 10:17:13,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1375 states. [2018-09-30 10:17:13,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 2186 transitions. [2018-09-30 10:17:13,268 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 2186 transitions. Word has length 21 [2018-09-30 10:17:13,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:13,268 INFO L480 AbstractCegarLoop]: Abstraction has 1375 states and 2186 transitions. [2018-09-30 10:17:13,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 10:17:13,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 2186 transitions. [2018-09-30 10:17:13,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 10:17:13,269 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:13,269 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 10:17:13,269 INFO L423 AbstractCegarLoop]: === Iteration 56 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:13,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:13,269 INFO L82 PathProgramCache]: Analyzing trace with hash -97849607, now seen corresponding path program 1 times [2018-09-30 10:17:13,269 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:13,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:13,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:13,270 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:17:13,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:13,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 10:17:13,375 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:13,375 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 [2018-09-30 10:17:13,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:17:13,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:13,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:13,610 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:13,610 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-09-30 10:17:13,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 10:17:13,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 10:17:13,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:17:13,611 INFO L87 Difference]: Start difference. First operand 1375 states and 2186 transitions. Second operand 19 states. [2018-09-30 10:17:16,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:16,718 INFO L93 Difference]: Finished difference Result 3096 states and 4913 transitions. [2018-09-30 10:17:16,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 10:17:16,718 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2018-09-30 10:17:16,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:16,720 INFO L225 Difference]: With dead ends: 3096 [2018-09-30 10:17:16,720 INFO L226 Difference]: Without dead ends: 1770 [2018-09-30 10:17:16,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=571, Invalid=2735, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:17:16,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2018-09-30 10:17:17,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 1381. [2018-09-30 10:17:17,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1381 states. [2018-09-30 10:17:17,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 2193 transitions. [2018-09-30 10:17:17,249 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 2193 transitions. Word has length 21 [2018-09-30 10:17:17,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:17,249 INFO L480 AbstractCegarLoop]: Abstraction has 1381 states and 2193 transitions. [2018-09-30 10:17:17,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 10:17:17,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 2193 transitions. [2018-09-30 10:17:17,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 10:17:17,250 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:17,250 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:17:17,251 INFO L423 AbstractCegarLoop]: === Iteration 57 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:17,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:17,251 INFO L82 PathProgramCache]: Analyzing trace with hash 437466707, now seen corresponding path program 1 times [2018-09-30 10:17:17,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:17,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:17,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:17,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:17:17,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:17,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:17,348 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:17,348 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:17:17,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:17:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:17,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:17,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 10:17:17,442 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:17,442 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2018-09-30 10:17:17,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:17:17,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:17:17,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:17:17,443 INFO L87 Difference]: Start difference. First operand 1381 states and 2193 transitions. Second operand 13 states. [2018-09-30 10:17:19,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:19,318 INFO L93 Difference]: Finished difference Result 1858 states and 2972 transitions. [2018-09-30 10:17:19,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 10:17:19,319 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2018-09-30 10:17:19,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:19,321 INFO L225 Difference]: With dead ends: 1858 [2018-09-30 10:17:19,321 INFO L226 Difference]: Without dead ends: 1856 [2018-09-30 10:17:19,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 10:17:19,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2018-09-30 10:17:19,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1551. [2018-09-30 10:17:19,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1551 states. [2018-09-30 10:17:19,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 2486 transitions. [2018-09-30 10:17:19,819 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 2486 transitions. Word has length 21 [2018-09-30 10:17:19,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:19,819 INFO L480 AbstractCegarLoop]: Abstraction has 1551 states and 2486 transitions. [2018-09-30 10:17:19,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:17:19,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 2486 transitions. [2018-09-30 10:17:19,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 10:17:19,820 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:19,820 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 10:17:19,820 INFO L423 AbstractCegarLoop]: === Iteration 58 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:19,820 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:19,820 INFO L82 PathProgramCache]: Analyzing trace with hash -2130898623, now seen corresponding path program 2 times [2018-09-30 10:17:19,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:19,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:19,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:19,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:17:19,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:19,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:19,928 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 10:17:19,929 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:19,929 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:17:19,937 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:17:19,944 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:17:19,944 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:17:19,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 10:17:20,140 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:20,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2018-09-30 10:17:20,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 10:17:20,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 10:17:20,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:17:20,141 INFO L87 Difference]: Start difference. First operand 1551 states and 2486 transitions. Second operand 19 states. [2018-09-30 10:17:23,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:23,727 INFO L93 Difference]: Finished difference Result 1901 states and 3071 transitions. [2018-09-30 10:17:23,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 10:17:23,728 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2018-09-30 10:17:23,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:23,730 INFO L225 Difference]: With dead ends: 1901 [2018-09-30 10:17:23,730 INFO L226 Difference]: Without dead ends: 1899 [2018-09-30 10:17:23,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=509, Invalid=3031, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:17:23,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2018-09-30 10:17:24,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1583. [2018-09-30 10:17:24,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1583 states. [2018-09-30 10:17:24,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 2523 transitions. [2018-09-30 10:17:24,239 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 2523 transitions. Word has length 21 [2018-09-30 10:17:24,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:24,239 INFO L480 AbstractCegarLoop]: Abstraction has 1583 states and 2523 transitions. [2018-09-30 10:17:24,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 10:17:24,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 2523 transitions. [2018-09-30 10:17:24,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 10:17:24,240 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:24,240 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:17:24,240 INFO L423 AbstractCegarLoop]: === Iteration 59 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:24,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:24,241 INFO L82 PathProgramCache]: Analyzing trace with hash -2139486792, now seen corresponding path program 1 times [2018-09-30 10:17:24,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:24,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:24,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:24,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:17:24,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:24,333 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:24,333 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:24,333 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:17:24,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:17:24,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:24,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 10:17:24,424 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:24,424 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2018-09-30 10:17:24,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:17:24,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:17:24,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:17:24,425 INFO L87 Difference]: Start difference. First operand 1583 states and 2523 transitions. Second operand 13 states. [2018-09-30 10:17:25,744 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-09-30 10:17:27,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:27,311 INFO L93 Difference]: Finished difference Result 2207 states and 3564 transitions. [2018-09-30 10:17:27,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 10:17:27,311 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2018-09-30 10:17:27,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:27,313 INFO L225 Difference]: With dead ends: 2207 [2018-09-30 10:17:27,313 INFO L226 Difference]: Without dead ends: 2205 [2018-09-30 10:17:27,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:17:27,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2018-09-30 10:17:27,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 1741. [2018-09-30 10:17:27,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1741 states. [2018-09-30 10:17:27,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 2777 transitions. [2018-09-30 10:17:27,852 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 2777 transitions. Word has length 21 [2018-09-30 10:17:27,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:27,853 INFO L480 AbstractCegarLoop]: Abstraction has 1741 states and 2777 transitions. [2018-09-30 10:17:27,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:17:27,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 2777 transitions. [2018-09-30 10:17:27,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 10:17:27,853 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:27,854 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:17:27,854 INFO L423 AbstractCegarLoop]: === Iteration 60 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:27,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:27,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1673653662, now seen corresponding path program 2 times [2018-09-30 10:17:27,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:27,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:27,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:27,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:17:27,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:27,936 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:27,936 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:27,936 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:17:27,945 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:17:27,953 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:17:27,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:17:27,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:28,063 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:28,087 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:28,088 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2018-09-30 10:17:28,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:17:28,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:17:28,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:17:28,088 INFO L87 Difference]: Start difference. First operand 1741 states and 2777 transitions. Second operand 15 states. [2018-09-30 10:17:32,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:32,361 INFO L93 Difference]: Finished difference Result 3370 states and 5507 transitions. [2018-09-30 10:17:32,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 10:17:32,362 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2018-09-30 10:17:32,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:32,365 INFO L225 Difference]: With dead ends: 3370 [2018-09-30 10:17:32,365 INFO L226 Difference]: Without dead ends: 3368 [2018-09-30 10:17:32,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=719, Invalid=2941, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 10:17:32,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2018-09-30 10:17:33,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 2044. [2018-09-30 10:17:33,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2044 states. [2018-09-30 10:17:33,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 3284 transitions. [2018-09-30 10:17:33,006 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 3284 transitions. Word has length 21 [2018-09-30 10:17:33,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:33,006 INFO L480 AbstractCegarLoop]: Abstraction has 2044 states and 3284 transitions. [2018-09-30 10:17:33,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:17:33,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 3284 transitions. [2018-09-30 10:17:33,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 10:17:33,007 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:33,007 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:17:33,007 INFO L423 AbstractCegarLoop]: === Iteration 61 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:33,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:33,007 INFO L82 PathProgramCache]: Analyzing trace with hash 212422270, now seen corresponding path program 2 times [2018-09-30 10:17:33,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:33,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:33,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:33,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:17:33,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-30 10:17:33,077 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:33,077 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:17:33,085 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:17:33,093 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:17:33,093 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:17:33,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:33,152 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 10:17:33,173 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:33,173 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-09-30 10:17:33,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 10:17:33,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 10:17:33,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:17:33,174 INFO L87 Difference]: Start difference. First operand 2044 states and 3284 transitions. Second operand 12 states. [2018-09-30 10:17:35,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:35,747 INFO L93 Difference]: Finished difference Result 5216 states and 8321 transitions. [2018-09-30 10:17:35,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 10:17:35,748 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-09-30 10:17:35,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:35,751 INFO L225 Difference]: With dead ends: 5216 [2018-09-30 10:17:35,751 INFO L226 Difference]: Without dead ends: 3229 [2018-09-30 10:17:35,754 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=517, Invalid=1835, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 10:17:35,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3229 states. [2018-09-30 10:17:36,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3229 to 2942. [2018-09-30 10:17:36,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2942 states. [2018-09-30 10:17:36,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2942 states to 2942 states and 4622 transitions. [2018-09-30 10:17:36,774 INFO L78 Accepts]: Start accepts. Automaton has 2942 states and 4622 transitions. Word has length 21 [2018-09-30 10:17:36,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:36,775 INFO L480 AbstractCegarLoop]: Abstraction has 2942 states and 4622 transitions. [2018-09-30 10:17:36,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 10:17:36,775 INFO L276 IsEmpty]: Start isEmpty. Operand 2942 states and 4622 transitions. [2018-09-30 10:17:36,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 10:17:36,776 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:36,776 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 10:17:36,776 INFO L423 AbstractCegarLoop]: === Iteration 62 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:36,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:36,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1977173104, now seen corresponding path program 1 times [2018-09-30 10:17:36,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:36,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:36,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:36,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:17:36,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:37,103 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:37,104 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:37,104 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:17:37,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:17:37,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:37,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:37,309 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:37,329 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:37,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2018-09-30 10:17:37,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 10:17:37,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 10:17:37,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:17:37,330 INFO L87 Difference]: Start difference. First operand 2942 states and 4622 transitions. Second operand 22 states. [2018-09-30 10:17:45,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:45,699 INFO L93 Difference]: Finished difference Result 4706 states and 7339 transitions. [2018-09-30 10:17:45,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 10:17:45,699 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 23 [2018-09-30 10:17:45,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:45,703 INFO L225 Difference]: With dead ends: 4706 [2018-09-30 10:17:45,703 INFO L226 Difference]: Without dead ends: 4704 [2018-09-30 10:17:45,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5067 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2033, Invalid=12009, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 10:17:45,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4704 states. [2018-09-30 10:17:47,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4704 to 3514. [2018-09-30 10:17:47,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3514 states. [2018-09-30 10:17:47,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3514 states to 3514 states and 5500 transitions. [2018-09-30 10:17:47,152 INFO L78 Accepts]: Start accepts. Automaton has 3514 states and 5500 transitions. Word has length 23 [2018-09-30 10:17:47,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:47,152 INFO L480 AbstractCegarLoop]: Abstraction has 3514 states and 5500 transitions. [2018-09-30 10:17:47,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 10:17:47,152 INFO L276 IsEmpty]: Start isEmpty. Operand 3514 states and 5500 transitions. [2018-09-30 10:17:47,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 10:17:47,153 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:47,153 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:17:47,153 INFO L423 AbstractCegarLoop]: === Iteration 63 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:47,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:47,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1266805704, now seen corresponding path program 1 times [2018-09-30 10:17:47,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:47,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:47,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:47,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:17:47,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:47,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:47,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:47,383 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:47,383 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:17:47,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:17:47,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:47,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 10:17:47,562 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:47,562 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2018-09-30 10:17:47,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 10:17:47,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 10:17:47,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2018-09-30 10:17:47,563 INFO L87 Difference]: Start difference. First operand 3514 states and 5500 transitions. Second operand 21 states. [2018-09-30 10:17:54,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:54,308 INFO L93 Difference]: Finished difference Result 4911 states and 7636 transitions. [2018-09-30 10:17:54,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 10:17:54,308 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 23 [2018-09-30 10:17:54,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:54,313 INFO L225 Difference]: With dead ends: 4911 [2018-09-30 10:17:54,313 INFO L226 Difference]: Without dead ends: 4904 [2018-09-30 10:17:54,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=802, Invalid=3890, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 10:17:54,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4904 states. [2018-09-30 10:17:56,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4904 to 2925. [2018-09-30 10:17:56,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2925 states. [2018-09-30 10:17:56,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2925 states to 2925 states and 4501 transitions. [2018-09-30 10:17:56,011 INFO L78 Accepts]: Start accepts. Automaton has 2925 states and 4501 transitions. Word has length 23 [2018-09-30 10:17:56,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:56,011 INFO L480 AbstractCegarLoop]: Abstraction has 2925 states and 4501 transitions. [2018-09-30 10:17:56,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 10:17:56,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2925 states and 4501 transitions. [2018-09-30 10:17:56,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 10:17:56,012 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:56,012 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:17:56,013 INFO L423 AbstractCegarLoop]: === Iteration 64 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:56,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:56,013 INFO L82 PathProgramCache]: Analyzing trace with hash -407447728, now seen corresponding path program 1 times [2018-09-30 10:17:56,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:56,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:56,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:56,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:17:56,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:56,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:56,320 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:56,320 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:17:56,327 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:17:56,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:56,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 10:17:56,507 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:56,507 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2018-09-30 10:17:56,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 10:17:56,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 10:17:56,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:17:56,508 INFO L87 Difference]: Start difference. First operand 2925 states and 4501 transitions. Second operand 22 states. [2018-09-30 10:18:01,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:01,839 INFO L93 Difference]: Finished difference Result 3641 states and 5640 transitions. [2018-09-30 10:18:01,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 10:18:01,839 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 23 [2018-09-30 10:18:01,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:01,843 INFO L225 Difference]: With dead ends: 3641 [2018-09-30 10:18:01,843 INFO L226 Difference]: Without dead ends: 3634 [2018-09-30 10:18:01,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=768, Invalid=3788, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 10:18:01,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3634 states. [2018-09-30 10:18:03,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3634 to 2472. [2018-09-30 10:18:03,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2472 states. [2018-09-30 10:18:03,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 3826 transitions. [2018-09-30 10:18:03,043 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 3826 transitions. Word has length 23 [2018-09-30 10:18:03,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:03,043 INFO L480 AbstractCegarLoop]: Abstraction has 2472 states and 3826 transitions. [2018-09-30 10:18:03,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 10:18:03,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 3826 transitions. [2018-09-30 10:18:03,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 10:18:03,044 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:03,045 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] [2018-09-30 10:18:03,045 INFO L423 AbstractCegarLoop]: === Iteration 65 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:03,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:03,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1545525427, now seen corresponding path program 1 times [2018-09-30 10:18:03,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:03,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:03,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:03,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:03,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:03,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:03,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:03,174 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:03,174 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:03,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:03,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 10:18:03,307 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:03,307 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 14 [2018-09-30 10:18:03,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:18:03,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:18:03,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:18:03,307 INFO L87 Difference]: Start difference. First operand 2472 states and 3826 transitions. Second operand 15 states. [2018-09-30 10:18:07,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:07,102 INFO L93 Difference]: Finished difference Result 3028 states and 4680 transitions. [2018-09-30 10:18:07,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 10:18:07,103 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2018-09-30 10:18:07,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:07,105 INFO L225 Difference]: With dead ends: 3028 [2018-09-30 10:18:07,105 INFO L226 Difference]: Without dead ends: 3026 [2018-09-30 10:18:07,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=263, Invalid=1459, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:18:07,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2018-09-30 10:18:08,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 2443. [2018-09-30 10:18:08,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2443 states. [2018-09-30 10:18:08,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2443 states to 2443 states and 3774 transitions. [2018-09-30 10:18:08,412 INFO L78 Accepts]: Start accepts. Automaton has 2443 states and 3774 transitions. Word has length 24 [2018-09-30 10:18:08,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:08,413 INFO L480 AbstractCegarLoop]: Abstraction has 2443 states and 3774 transitions. [2018-09-30 10:18:08,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:18:08,413 INFO L276 IsEmpty]: Start isEmpty. Operand 2443 states and 3774 transitions. [2018-09-30 10:18:08,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 10:18:08,414 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:08,414 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2018-09-30 10:18:08,414 INFO L423 AbstractCegarLoop]: === Iteration 66 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:08,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:08,414 INFO L82 PathProgramCache]: Analyzing trace with hash -136248690, now seen corresponding path program 3 times [2018-09-30 10:18:08,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:08,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:08,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:08,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:08,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:08,510 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 10:18:08,511 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:08,511 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:08,518 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:18:08,524 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-09-30 10:18:08,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:08,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:08,606 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-30 10:18:08,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:08,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2018-09-30 10:18:08,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:18:08,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:18:08,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:18:08,627 INFO L87 Difference]: Start difference. First operand 2443 states and 3774 transitions. Second operand 15 states. [2018-09-30 10:18:11,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:11,606 INFO L93 Difference]: Finished difference Result 2592 states and 4005 transitions. [2018-09-30 10:18:11,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 10:18:11,607 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2018-09-30 10:18:11,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:11,609 INFO L225 Difference]: With dead ends: 2592 [2018-09-30 10:18:11,609 INFO L226 Difference]: Without dead ends: 2590 [2018-09-30 10:18:11,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=319, Invalid=1087, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:18:11,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2018-09-30 10:18:12,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 2279. [2018-09-30 10:18:12,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2279 states. [2018-09-30 10:18:12,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 3506 transitions. [2018-09-30 10:18:12,907 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 3506 transitions. Word has length 24 [2018-09-30 10:18:12,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:12,907 INFO L480 AbstractCegarLoop]: Abstraction has 2279 states and 3506 transitions. [2018-09-30 10:18:12,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:18:12,907 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 3506 transitions. [2018-09-30 10:18:12,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 10:18:12,908 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:12,908 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:18:12,908 INFO L423 AbstractCegarLoop]: === Iteration 67 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:12,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:12,908 INFO L82 PathProgramCache]: Analyzing trace with hash -518454402, now seen corresponding path program 1 times [2018-09-30 10:18:12,908 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:12,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:12,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:12,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:12,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:13,052 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:13,053 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:13,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:13,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:13,146 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 10:18:13,167 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:13,167 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2018-09-30 10:18:13,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:18:13,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:18:13,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:18:13,168 INFO L87 Difference]: Start difference. First operand 2279 states and 3506 transitions. Second operand 16 states. [2018-09-30 10:18:16,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:16,290 INFO L93 Difference]: Finished difference Result 2414 states and 3709 transitions. [2018-09-30 10:18:16,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 10:18:16,290 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2018-09-30 10:18:16,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:16,293 INFO L225 Difference]: With dead ends: 2414 [2018-09-30 10:18:16,293 INFO L226 Difference]: Without dead ends: 2412 [2018-09-30 10:18:16,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=236, Invalid=1404, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 10:18:16,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2018-09-30 10:18:17,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 2274. [2018-09-30 10:18:17,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2274 states. [2018-09-30 10:18:17,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2274 states to 2274 states and 3496 transitions. [2018-09-30 10:18:17,616 INFO L78 Accepts]: Start accepts. Automaton has 2274 states and 3496 transitions. Word has length 24 [2018-09-30 10:18:17,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:17,617 INFO L480 AbstractCegarLoop]: Abstraction has 2274 states and 3496 transitions. [2018-09-30 10:18:17,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:18:17,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2274 states and 3496 transitions. [2018-09-30 10:18:17,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 10:18:17,619 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:17,619 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:18:17,619 INFO L423 AbstractCegarLoop]: === Iteration 68 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:17,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:17,619 INFO L82 PathProgramCache]: Analyzing trace with hash -916627202, now seen corresponding path program 1 times [2018-09-30 10:18:17,619 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:17,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:17,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:17,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:17,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 10:18:18,030 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:18,030 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:18,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:18,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-30 10:18:18,166 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:18,166 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2018-09-30 10:18:18,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:18:18,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:18:18,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:18:18,167 INFO L87 Difference]: Start difference. First operand 2274 states and 3496 transitions. Second operand 16 states. [2018-09-30 10:18:21,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:21,699 INFO L93 Difference]: Finished difference Result 2734 states and 4210 transitions. [2018-09-30 10:18:21,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 10:18:21,699 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2018-09-30 10:18:21,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:21,702 INFO L225 Difference]: With dead ends: 2734 [2018-09-30 10:18:21,702 INFO L226 Difference]: Without dead ends: 2732 [2018-09-30 10:18:21,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=309, Invalid=1497, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 10:18:21,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2018-09-30 10:18:23,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 2357. [2018-09-30 10:18:23,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2357 states. [2018-09-30 10:18:23,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 3634 transitions. [2018-09-30 10:18:23,101 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 3634 transitions. Word has length 29 [2018-09-30 10:18:23,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:23,102 INFO L480 AbstractCegarLoop]: Abstraction has 2357 states and 3634 transitions. [2018-09-30 10:18:23,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:18:23,102 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 3634 transitions. [2018-09-30 10:18:23,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 10:18:23,103 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:23,103 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:18:23,103 INFO L423 AbstractCegarLoop]: === Iteration 69 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:23,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:23,103 INFO L82 PathProgramCache]: Analyzing trace with hash 524508242, now seen corresponding path program 1 times [2018-09-30 10:18:23,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:23,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:23,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:23,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:23,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:23,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:23,257 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 10:18:23,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:23,258 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:23,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:23,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:23,392 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 10:18:23,411 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:23,412 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2018-09-30 10:18:23,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 10:18:23,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 10:18:23,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:18:23,412 INFO L87 Difference]: Start difference. First operand 2357 states and 3634 transitions. Second operand 17 states. [2018-09-30 10:18:32,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:32,698 INFO L93 Difference]: Finished difference Result 5146 states and 8058 transitions. [2018-09-30 10:18:32,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 10:18:32,698 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2018-09-30 10:18:32,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:32,702 INFO L225 Difference]: With dead ends: 5146 [2018-09-30 10:18:32,702 INFO L226 Difference]: Without dead ends: 5144 [2018-09-30 10:18:32,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3126 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1591, Invalid=7915, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 10:18:32,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5144 states. [2018-09-30 10:18:34,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5144 to 3465. [2018-09-30 10:18:34,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3465 states. [2018-09-30 10:18:34,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3465 states to 3465 states and 5438 transitions. [2018-09-30 10:18:34,564 INFO L78 Accepts]: Start accepts. Automaton has 3465 states and 5438 transitions. Word has length 29 [2018-09-30 10:18:34,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:34,565 INFO L480 AbstractCegarLoop]: Abstraction has 3465 states and 5438 transitions. [2018-09-30 10:18:34,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 10:18:34,565 INFO L276 IsEmpty]: Start isEmpty. Operand 3465 states and 5438 transitions. [2018-09-30 10:18:34,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 10:18:34,566 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:34,566 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 10:18:34,566 INFO L423 AbstractCegarLoop]: === Iteration 70 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:34,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:34,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1958472419, now seen corresponding path program 4 times [2018-09-30 10:18:34,567 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:34,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:34,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:34,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:34,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:34,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:34,749 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 10:18:34,750 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:34,750 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:34,760 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:18:34,770 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:18:34,771 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:34,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:34,950 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 10:18:34,970 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:34,970 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2018-09-30 10:18:34,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 10:18:34,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 10:18:34,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:18:34,971 INFO L87 Difference]: Start difference. First operand 3465 states and 5438 transitions. Second operand 17 states. [2018-09-30 10:18:43,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:43,839 INFO L93 Difference]: Finished difference Result 4974 states and 7795 transitions. [2018-09-30 10:18:43,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 10:18:43,840 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2018-09-30 10:18:43,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:43,844 INFO L225 Difference]: With dead ends: 4974 [2018-09-30 10:18:43,844 INFO L226 Difference]: Without dead ends: 4972 [2018-09-30 10:18:43,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1978 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1292, Invalid=5350, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 10:18:43,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4972 states. [2018-09-30 10:18:45,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4972 to 3050. [2018-09-30 10:18:45,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3050 states. [2018-09-30 10:18:45,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3050 states to 3050 states and 4722 transitions. [2018-09-30 10:18:45,657 INFO L78 Accepts]: Start accepts. Automaton has 3050 states and 4722 transitions. Word has length 29 [2018-09-30 10:18:45,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:45,657 INFO L480 AbstractCegarLoop]: Abstraction has 3050 states and 4722 transitions. [2018-09-30 10:18:45,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 10:18:45,657 INFO L276 IsEmpty]: Start isEmpty. Operand 3050 states and 4722 transitions. [2018-09-30 10:18:45,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 10:18:45,659 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:45,659 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:18:45,659 INFO L423 AbstractCegarLoop]: === Iteration 71 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:45,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:45,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1748672885, now seen corresponding path program 1 times [2018-09-30 10:18:45,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:45,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:45,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:45,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:45,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:45,983 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 10:18:45,983 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:45,983 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:45,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:46,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:46,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:46,209 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 10:18:46,228 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:46,229 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2018-09-30 10:18:46,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 10:18:46,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 10:18:46,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:18:46,229 INFO L87 Difference]: Start difference. First operand 3050 states and 4722 transitions. Second operand 24 states. [2018-09-30 10:19:07,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:07,126 INFO L93 Difference]: Finished difference Result 8298 states and 13026 transitions. [2018-09-30 10:19:07,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2018-09-30 10:19:07,126 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2018-09-30 10:19:07,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:07,133 INFO L225 Difference]: With dead ends: 8298 [2018-09-30 10:19:07,133 INFO L226 Difference]: Without dead ends: 8296 [2018-09-30 10:19:07,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18877 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=5438, Invalid=41868, Unknown=0, NotChecked=0, Total=47306 [2018-09-30 10:19:07,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8296 states. [2018-09-30 10:19:10,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8296 to 5309. [2018-09-30 10:19:10,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5309 states. [2018-09-30 10:19:10,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5309 states to 5309 states and 8285 transitions. [2018-09-30 10:19:10,162 INFO L78 Accepts]: Start accepts. Automaton has 5309 states and 8285 transitions. Word has length 31 [2018-09-30 10:19:10,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:10,163 INFO L480 AbstractCegarLoop]: Abstraction has 5309 states and 8285 transitions. [2018-09-30 10:19:10,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 10:19:10,163 INFO L276 IsEmpty]: Start isEmpty. Operand 5309 states and 8285 transitions. [2018-09-30 10:19:10,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 10:19:10,165 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:10,165 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2018-09-30 10:19:10,165 INFO L423 AbstractCegarLoop]: === Iteration 72 === [productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT, productErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:10,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:10,165 INFO L82 PathProgramCache]: Analyzing trace with hash 2080043466, now seen corresponding path program 2 times [2018-09-30 10:19:10,165 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:10,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:10,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:10,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:10,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:10,341 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 10:19:10,341 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:10,341 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:10,348 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:19:10,358 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:19:10,359 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:10,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:10,556 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-30 10:19:10,578 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:10,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 25 [2018-09-30 10:19:10,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 10:19:10,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 10:19:10,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2018-09-30 10:19:10,579 INFO L87 Difference]: Start difference. First operand 5309 states and 8285 transitions. Second operand 25 states. Received shutdown request... [2018-09-30 10:19:17,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 10:19:17,387 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 10:19:17,392 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 10:19:17,392 INFO L202 PluginConnector]: Adding new model threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 10:19:17 BoogieIcfgContainer [2018-09-30 10:19:17,393 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 10:19:17,394 INFO L168 Benchmark]: Toolchain (without parser) took 255345.32 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 842.5 MB). Free memory was 1.5 GB in the beginning and 2.0 GB in the end (delta: -556.3 MB). Peak memory consumption was 286.3 MB. Max. memory is 7.1 GB. [2018-09-30 10:19:17,394 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:19:17,395 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.07 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:19:17,395 INFO L168 Benchmark]: Boogie Preprocessor took 22.09 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:19:17,395 INFO L168 Benchmark]: RCFGBuilder took 642.73 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 10:19:17,396 INFO L168 Benchmark]: TraceAbstraction took 254635.55 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 842.5 MB). Free memory was 1.5 GB in the beginning and 2.0 GB in the end (delta: -577.4 MB). Peak memory consumption was 265.1 MB. Max. memory is 7.1 GB. [2018-09-30 10:19:17,398 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 39.07 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.09 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 642.73 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 254635.55 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 842.5 MB). Free memory was 1.5 GB in the beginning and 2.0 GB in the end (delta: -577.4 MB). Peak memory consumption was 265.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 94). Cancelled while BasicCegarLoop was constructing difference of abstraction (5309states) and FLOYD_HOARE automaton (currently 49 states, 25 states before enhancement), while ReachableStatesComputation was computing reachable states (5489 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 85). Cancelled while BasicCegarLoop was constructing difference of abstraction (5309states) and FLOYD_HOARE automaton (currently 49 states, 25 states before enhancement), while ReachableStatesComputation was computing reachable states (5489 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 45). Cancelled while BasicCegarLoop was constructing difference of abstraction (5309states) and FLOYD_HOARE automaton (currently 49 states, 25 states before enhancement), while ReachableStatesComputation was computing reachable states (5489 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 74). Cancelled while BasicCegarLoop was constructing difference of abstraction (5309states) and FLOYD_HOARE automaton (currently 49 states, 25 states before enhancement), while ReachableStatesComputation was computing reachable states (5489 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 23 locations, 4 error locations. TIMEOUT Result, 254.5s OverallTime, 72 OverallIterations, 6 TraceHistogramMax, 198.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2731 SDtfs, 14178 SDslu, 9917 SDs, 0 SdLazy, 81472 SolverSat, 7727 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 69.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4091 GetRequests, 811 SyntacticMatches, 22 SemanticMatches, 3258 ConstructedPredicates, 0 IntricatePredicates, 11 DeprecatedPredicates, 69096 ImplicationChecksByTransitivity, 83.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5309occurred in iteration=71, 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: 31.1s AutomataMinimizationTime, 71 MinimizatonAttempts, 29941 StatesRemovedByMinimization, 71 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 21.3s InterpolantComputationTime, 2363 NumberOfCodeBlocks, 2357 NumberOfCodeBlocksAsserted, 147 NumberOfCheckSat, 2226 ConstructedInterpolants, 174 QuantifiedInterpolants, 288370 SizeOfPredicates, 305 NumberOfNonLiveVariables, 3230 ConjunctsInSsa, 647 ConjunctsInUnsatCore, 137 InterpolantComputations, 14 PerfectInterpolantSequences, 285/1410 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.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_10-19-17-408.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/threadpooling_product.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_10-19-17-408.csv Completed graceful shutdown