java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/real-life/threadpooling_product_WithProcedures.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 20:06:37,533 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:06:37,535 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:06:37,552 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 20:06:37,553 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 20:06:37,555 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 20:06:37,564 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 20:06:37,573 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 20:06:37,578 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 20:06:37,579 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 20:06:37,581 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 20:06:37,582 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 20:06:37,583 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 20:06:37,584 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 20:06:37,587 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 20:06:37,588 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 20:06:37,589 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 20:06:37,592 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 20:06:37,595 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 20:06:37,597 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 20:06:37,598 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 20:06:37,599 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 20:06:37,601 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-30 20:06:37,601 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-30 20:06:37,601 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-30 20:06:37,602 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-30 20:06:37,603 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-30 20:06:37,604 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-30 20:06:37,605 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-30 20:06:37,606 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-30 20:06:37,606 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-30 20:06:37,607 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-30 20:06:37,607 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-30 20:06:37,607 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-30 20:06:37,608 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-30 20:06:37,609 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-30 20:06:37,609 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 20:06:37,626 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:06:37,626 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:06:37,628 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:06:37,628 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:06:37,628 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:06:37,629 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:06:37,629 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:06:37,629 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:06:37,630 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:06:37,631 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:06:37,631 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:06:37,631 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:06:37,631 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:06:37,631 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:06:37,632 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:06:37,632 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:06:37,632 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:06:37,632 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:06:37,632 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:06:37,633 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:06:37,633 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:06:37,633 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:06:37,633 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:06:37,633 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:06:37,634 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:06:37,635 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:06:37,635 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:06:37,635 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:06:37,635 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:06:37,635 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:06:37,697 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:06:37,711 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:06:37,718 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:06:37,720 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:06:37,721 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:06:37,722 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/threadpooling_product_WithProcedures.bpl [2018-09-30 20:06:37,723 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/threadpooling_product_WithProcedures.bpl' [2018-09-30 20:06:37,798 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:06:37,804 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:06:37,805 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:06:37,806 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:06:37,806 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:06:37,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:06:37" (1/1) ... [2018-09-30 20:06:37,840 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:06:37" (1/1) ... [2018-09-30 20:06:37,849 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:06:37,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:06:37,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:06:37,850 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:06:37,862 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:06:37" (1/1) ... [2018-09-30 20:06:37,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:06:37" (1/1) ... [2018-09-30 20:06:37,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:06:37" (1/1) ... [2018-09-30 20:06:37,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:06:37" (1/1) ... [2018-09-30 20:06:37,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:06:37" (1/1) ... [2018-09-30 20:06:37,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:06:37" (1/1) ... [2018-09-30 20:06:37,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:06:37" (1/1) ... [2018-09-30 20:06:37,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:06:37,886 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:06:37,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:06:37,886 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:06:37,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:06:37" (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 20:06:37,953 INFO L130 BoogieDeclarations]: Found specification of procedure l1l0 [2018-09-30 20:06:37,953 INFO L138 BoogieDeclarations]: Found implementation of procedure l1l0 [2018-09-30 20:06:37,954 INFO L130 BoogieDeclarations]: Found specification of procedure l0l1 [2018-09-30 20:06:37,954 INFO L138 BoogieDeclarations]: Found implementation of procedure l0l1 [2018-09-30 20:06:37,954 INFO L130 BoogieDeclarations]: Found specification of procedure l0l0 [2018-09-30 20:06:37,954 INFO L138 BoogieDeclarations]: Found implementation of procedure l0l0 [2018-09-30 20:06:37,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 20:06:37,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 20:06:37,955 INFO L130 BoogieDeclarations]: Found specification of procedure l1l1 [2018-09-30 20:06:37,955 INFO L138 BoogieDeclarations]: Found implementation of procedure l1l1 [2018-09-30 20:06:38,619 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 20:06:38,620 INFO L202 PluginConnector]: Adding new model threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:06:38 BoogieIcfgContainer [2018-09-30 20:06:38,620 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:06:38,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:06:38,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:06:38,625 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:06:38,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:06:37" (1/2) ... [2018-09-30 20:06:38,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@197e1aa and model type threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:06:38, skipping insertion in model container [2018-09-30 20:06:38,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:06:38" (2/2) ... [2018-09-30 20:06:38,628 INFO L112 eAbstractionObserver]: Analyzing ICFG threadpooling_product_WithProcedures.bpl [2018-09-30 20:06:38,637 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:06:38,647 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-09-30 20:06:38,696 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:06:38,697 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:06:38,697 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:06:38,697 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:06:38,697 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:06:38,697 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:06:38,698 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:06:38,698 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:06:38,698 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:06:38,719 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2018-09-30 20:06:38,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 20:06:38,724 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:38,725 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:06:38,727 INFO L423 AbstractCegarLoop]: === Iteration 1 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:38,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:38,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1282157605, now seen corresponding path program 1 times [2018-09-30 20:06:38,735 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:38,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:38,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:38,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:38,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:38,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:06:38,981 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:06:38,981 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-30 20:06:38,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:06:38,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:06:38,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:06:39,000 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 6 states. [2018-09-30 20:06:39,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:06:39,886 INFO L93 Difference]: Finished difference Result 72 states and 100 transitions. [2018-09-30 20:06:39,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:06:39,889 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2018-09-30 20:06:39,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:06:39,902 INFO L225 Difference]: With dead ends: 72 [2018-09-30 20:06:39,903 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 20:06:39,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:06:39,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 20:06:39,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 48. [2018-09-30 20:06:39,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 20:06:39,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2018-09-30 20:06:39,957 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 7 [2018-09-30 20:06:39,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:06:39,957 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2018-09-30 20:06:39,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:06:39,958 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2018-09-30 20:06:39,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 20:06:39,959 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:39,959 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:06:39,960 INFO L423 AbstractCegarLoop]: === Iteration 2 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:39,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:39,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1272619553, now seen corresponding path program 1 times [2018-09-30 20:06:39,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:39,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:39,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:39,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:39,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:39,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:40,068 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 20:06:40,068 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:06:40,068 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-30 20:06:40,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:06:40,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:06:40,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:06:40,071 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 6 states. [2018-09-30 20:06:40,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:06:40,539 INFO L93 Difference]: Finished difference Result 81 states and 113 transitions. [2018-09-30 20:06:40,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:06:40,542 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2018-09-30 20:06:40,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:06:40,545 INFO L225 Difference]: With dead ends: 81 [2018-09-30 20:06:40,545 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 20:06:40,546 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:06:40,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 20:06:40,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 57. [2018-09-30 20:06:40,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 20:06:40,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 78 transitions. [2018-09-30 20:06:40,561 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 78 transitions. Word has length 7 [2018-09-30 20:06:40,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:06:40,561 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 78 transitions. [2018-09-30 20:06:40,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:06:40,561 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 78 transitions. [2018-09-30 20:06:40,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:06:40,564 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:40,564 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:06:40,564 INFO L423 AbstractCegarLoop]: === Iteration 3 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:40,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:40,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1601446133, now seen corresponding path program 1 times [2018-09-30 20:06:40,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:40,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:40,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:40,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:40,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:40,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:40,755 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 20:06:40,757 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:06:40,758 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-30 20:06:40,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:06:40,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:06:40,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:06:40,759 INFO L87 Difference]: Start difference. First operand 57 states and 78 transitions. Second operand 7 states. [2018-09-30 20:06:41,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:06:41,915 INFO L93 Difference]: Finished difference Result 122 states and 175 transitions. [2018-09-30 20:06:41,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:06:41,918 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-09-30 20:06:41,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:06:41,921 INFO L225 Difference]: With dead ends: 122 [2018-09-30 20:06:41,921 INFO L226 Difference]: Without dead ends: 120 [2018-09-30 20:06:41,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:06:41,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-30 20:06:41,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 73. [2018-09-30 20:06:41,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 20:06:41,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 103 transitions. [2018-09-30 20:06:41,939 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 103 transitions. Word has length 10 [2018-09-30 20:06:41,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:06:41,939 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 103 transitions. [2018-09-30 20:06:41,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:06:41,940 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 103 transitions. [2018-09-30 20:06:41,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:06:41,941 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:41,941 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:06:41,942 INFO L423 AbstractCegarLoop]: === Iteration 4 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:41,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:41,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1152651256, now seen corresponding path program 1 times [2018-09-30 20:06:41,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:41,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:41,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:41,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:41,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:41,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:42,074 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 20:06:42,075 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:06:42,075 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 20:06:42,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:42,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:06:42,504 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 20:06:42,525 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:06:42,526 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2018-09-30 20:06:42,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:06:42,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:06:42,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:06:42,527 INFO L87 Difference]: Start difference. First operand 73 states and 103 transitions. Second operand 9 states. [2018-09-30 20:06:43,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:06:43,492 INFO L93 Difference]: Finished difference Result 168 states and 243 transitions. [2018-09-30 20:06:43,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:06:43,493 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2018-09-30 20:06:43,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:06:43,496 INFO L225 Difference]: With dead ends: 168 [2018-09-30 20:06:43,496 INFO L226 Difference]: Without dead ends: 121 [2018-09-30 20:06:43,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:06:43,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-30 20:06:43,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 97. [2018-09-30 20:06:43,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 20:06:43,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 136 transitions. [2018-09-30 20:06:43,519 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 136 transitions. Word has length 10 [2018-09-30 20:06:43,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:06:43,519 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 136 transitions. [2018-09-30 20:06:43,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:06:43,520 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 136 transitions. [2018-09-30 20:06:43,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:06:43,522 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:43,522 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:06:43,522 INFO L423 AbstractCegarLoop]: === Iteration 5 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:43,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:43,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1536370777, now seen corresponding path program 1 times [2018-09-30 20:06:43,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:43,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:43,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:43,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:43,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:43,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:43,618 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 20:06:43,619 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:06:43,619 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 20:06:43,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:43,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:06:43,888 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 20:06:43,911 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:06:43,912 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-30 20:06:43,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:06:43,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:06:43,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:06:43,913 INFO L87 Difference]: Start difference. First operand 97 states and 136 transitions. Second operand 10 states. [2018-09-30 20:06:44,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:06:44,580 INFO L93 Difference]: Finished difference Result 164 states and 232 transitions. [2018-09-30 20:06:44,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:06:44,583 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2018-09-30 20:06:44,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:06:44,585 INFO L225 Difference]: With dead ends: 164 [2018-09-30 20:06:44,585 INFO L226 Difference]: Without dead ends: 162 [2018-09-30 20:06:44,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:06:44,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-30 20:06:44,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 109. [2018-09-30 20:06:44,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 20:06:44,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 154 transitions. [2018-09-30 20:06:44,622 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 154 transitions. Word has length 11 [2018-09-30 20:06:44,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:06:44,623 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 154 transitions. [2018-09-30 20:06:44,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:06:44,623 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 154 transitions. [2018-09-30 20:06:44,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:06:44,624 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:44,625 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:06:44,625 INFO L423 AbstractCegarLoop]: === Iteration 6 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:44,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:44,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1150793287, now seen corresponding path program 1 times [2018-09-30 20:06:44,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:44,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:44,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:44,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:44,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:44,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:44,703 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 20:06:44,703 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:06:44,703 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 20:06:44,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:44,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:06:44,901 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 20:06:44,926 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:06:44,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-30 20:06:44,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:06:44,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:06:44,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:06:44,928 INFO L87 Difference]: Start difference. First operand 109 states and 154 transitions. Second operand 10 states. [2018-09-30 20:06:45,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:06:45,751 INFO L93 Difference]: Finished difference Result 181 states and 254 transitions. [2018-09-30 20:06:45,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:06:45,752 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2018-09-30 20:06:45,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:06:45,754 INFO L225 Difference]: With dead ends: 181 [2018-09-30 20:06:45,754 INFO L226 Difference]: Without dead ends: 179 [2018-09-30 20:06:45,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:06:45,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-30 20:06:45,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 117. [2018-09-30 20:06:45,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 20:06:45,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 164 transitions. [2018-09-30 20:06:45,781 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 164 transitions. Word has length 11 [2018-09-30 20:06:45,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:06:45,782 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 164 transitions. [2018-09-30 20:06:45,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:06:45,782 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 164 transitions. [2018-09-30 20:06:45,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:06:45,784 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:45,784 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:06:45,785 INFO L423 AbstractCegarLoop]: === Iteration 7 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:45,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:45,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1829652612, now seen corresponding path program 1 times [2018-09-30 20:06:45,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:45,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:45,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:45,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:45,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:45,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:45,884 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 20:06:45,884 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:06:45,884 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 20:06:45,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:45,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:06:46,098 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 20:06:46,119 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:06:46,119 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2018-09-30 20:06:46,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:06:46,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:06:46,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:06:46,121 INFO L87 Difference]: Start difference. First operand 117 states and 164 transitions. Second operand 9 states. [2018-09-30 20:06:47,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:06:47,298 INFO L93 Difference]: Finished difference Result 217 states and 304 transitions. [2018-09-30 20:06:47,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:06:47,299 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2018-09-30 20:06:47,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:06:47,300 INFO L225 Difference]: With dead ends: 217 [2018-09-30 20:06:47,300 INFO L226 Difference]: Without dead ends: 133 [2018-09-30 20:06:47,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=380, Unknown=0, NotChecked=0, Total=552 [2018-09-30 20:06:47,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-30 20:06:47,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 119. [2018-09-30 20:06:47,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 20:06:47,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 160 transitions. [2018-09-30 20:06:47,324 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 160 transitions. Word has length 13 [2018-09-30 20:06:47,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:06:47,325 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 160 transitions. [2018-09-30 20:06:47,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:06:47,325 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 160 transitions. [2018-09-30 20:06:47,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 20:06:47,326 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:47,326 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:06:47,327 INFO L423 AbstractCegarLoop]: === Iteration 8 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:47,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:47,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1433054771, now seen corresponding path program 1 times [2018-09-30 20:06:47,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:47,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:47,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:47,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:47,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:47,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:47,426 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 20:06:47,426 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:06:47,426 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 20:06:47,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:47,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:47,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:06:47,821 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 20:06:47,844 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:06:47,844 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2018-09-30 20:06:47,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:06:47,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:06:47,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:06:47,845 INFO L87 Difference]: Start difference. First operand 119 states and 160 transitions. Second operand 13 states. [2018-09-30 20:06:49,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:06:49,704 INFO L93 Difference]: Finished difference Result 194 states and 266 transitions. [2018-09-30 20:06:49,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 20:06:49,705 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2018-09-30 20:06:49,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:06:49,706 INFO L225 Difference]: With dead ends: 194 [2018-09-30 20:06:49,707 INFO L226 Difference]: Without dead ends: 192 [2018-09-30 20:06:49,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:06:49,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-09-30 20:06:49,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 181. [2018-09-30 20:06:49,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-30 20:06:49,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 257 transitions. [2018-09-30 20:06:49,737 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 257 transitions. Word has length 14 [2018-09-30 20:06:49,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:06:49,737 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 257 transitions. [2018-09-30 20:06:49,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:06:49,738 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 257 transitions. [2018-09-30 20:06:49,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 20:06:49,739 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:49,739 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:06:49,739 INFO L423 AbstractCegarLoop]: === Iteration 9 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:49,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:49,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1436992942, now seen corresponding path program 1 times [2018-09-30 20:06:49,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:49,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:49,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:49,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:49,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:49,872 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 20:06:49,872 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:06:49,872 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 20:06:49,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:49,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:06:50,208 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 20:06:50,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:06:50,230 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2018-09-30 20:06:50,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:06:50,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:06:50,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:06:50,231 INFO L87 Difference]: Start difference. First operand 181 states and 257 transitions. Second operand 14 states. [2018-09-30 20:06:51,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:06:51,718 INFO L93 Difference]: Finished difference Result 246 states and 347 transitions. [2018-09-30 20:06:51,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 20:06:51,719 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-30 20:06:51,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:06:51,721 INFO L225 Difference]: With dead ends: 246 [2018-09-30 20:06:51,721 INFO L226 Difference]: Without dead ends: 244 [2018-09-30 20:06:51,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2018-09-30 20:06:51,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-09-30 20:06:51,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 193. [2018-09-30 20:06:51,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-30 20:06:51,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 274 transitions. [2018-09-30 20:06:51,757 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 274 transitions. Word has length 14 [2018-09-30 20:06:51,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:06:51,758 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 274 transitions. [2018-09-30 20:06:51,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:06:51,758 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 274 transitions. [2018-09-30 20:06:51,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 20:06:51,759 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:51,759 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:06:51,760 INFO L423 AbstractCegarLoop]: === Iteration 10 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:51,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:51,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1436993326, now seen corresponding path program 1 times [2018-09-30 20:06:51,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:51,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:51,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:51,761 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:51,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:51,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:51,874 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 20:06:51,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:06:51,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:06:51,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:51,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:06:52,066 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 20:06:52,088 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:06:52,088 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2018-09-30 20:06:52,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:06:52,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:06:52,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:06:52,089 INFO L87 Difference]: Start difference. First operand 193 states and 274 transitions. Second operand 14 states. [2018-09-30 20:06:54,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:06:54,256 INFO L93 Difference]: Finished difference Result 288 states and 406 transitions. [2018-09-30 20:06:54,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:06:54,263 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-30 20:06:54,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:06:54,265 INFO L225 Difference]: With dead ends: 288 [2018-09-30 20:06:54,266 INFO L226 Difference]: Without dead ends: 286 [2018-09-30 20:06:54,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=338, Invalid=1068, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 20:06:54,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2018-09-30 20:06:54,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 221. [2018-09-30 20:06:54,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-30 20:06:54,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 315 transitions. [2018-09-30 20:06:54,301 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 315 transitions. Word has length 14 [2018-09-30 20:06:54,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:06:54,301 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 315 transitions. [2018-09-30 20:06:54,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:06:54,301 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 315 transitions. [2018-09-30 20:06:54,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 20:06:54,302 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:54,302 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:06:54,303 INFO L423 AbstractCegarLoop]: === Iteration 11 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:54,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:54,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1791986342, now seen corresponding path program 1 times [2018-09-30 20:06:54,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:54,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:54,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:54,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:54,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:54,431 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 20:06:54,431 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:06:54,431 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:06:54,439 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:54,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:54,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:06:54,565 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 20:06:54,588 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:06:54,588 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2018-09-30 20:06:54,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:06:54,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:06:54,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:06:54,589 INFO L87 Difference]: Start difference. First operand 221 states and 315 transitions. Second operand 14 states. [2018-09-30 20:06:55,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:06:55,576 INFO L93 Difference]: Finished difference Result 314 states and 443 transitions. [2018-09-30 20:06:55,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:06:55,579 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-30 20:06:55,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:06:55,581 INFO L225 Difference]: With dead ends: 314 [2018-09-30 20:06:55,582 INFO L226 Difference]: Without dead ends: 312 [2018-09-30 20:06:55,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=307, Invalid=815, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:06:55,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2018-09-30 20:06:55,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 243. [2018-09-30 20:06:55,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-09-30 20:06:55,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 349 transitions. [2018-09-30 20:06:55,621 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 349 transitions. Word has length 14 [2018-09-30 20:06:55,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:06:55,621 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 349 transitions. [2018-09-30 20:06:55,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:06:55,621 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 349 transitions. [2018-09-30 20:06:55,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 20:06:55,622 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:55,622 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:06:55,622 INFO L423 AbstractCegarLoop]: === Iteration 12 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:55,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:55,623 INFO L82 PathProgramCache]: Analyzing trace with hash 844488035, now seen corresponding path program 1 times [2018-09-30 20:06:55,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:55,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:55,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:55,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:55,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:55,719 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 20:06:55,719 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:06:55,719 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 20:06:55,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:55,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:06:55,846 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 20:06:55,868 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:06:55,869 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2018-09-30 20:06:55,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:06:55,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:06:55,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:06:55,870 INFO L87 Difference]: Start difference. First operand 243 states and 349 transitions. Second operand 13 states. [2018-09-30 20:06:56,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:06:56,884 INFO L93 Difference]: Finished difference Result 322 states and 462 transitions. [2018-09-30 20:06:56,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 20:06:56,890 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2018-09-30 20:06:56,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:06:56,892 INFO L225 Difference]: With dead ends: 322 [2018-09-30 20:06:56,892 INFO L226 Difference]: Without dead ends: 320 [2018-09-30 20:06:56,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:06:56,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2018-09-30 20:06:56,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 302. [2018-09-30 20:06:56,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2018-09-30 20:06:56,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 444 transitions. [2018-09-30 20:06:56,952 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 444 transitions. Word has length 14 [2018-09-30 20:06:56,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:06:56,952 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 444 transitions. [2018-09-30 20:06:56,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:06:56,952 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 444 transitions. [2018-09-30 20:06:56,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 20:06:56,953 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:56,953 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:06:56,954 INFO L423 AbstractCegarLoop]: === Iteration 13 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:56,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:56,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1052420626, now seen corresponding path program 1 times [2018-09-30 20:06:56,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:56,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:56,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:56,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:56,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:57,118 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 20:06:57,119 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:06:57,119 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 20:06:57,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:57,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:06:57,248 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 20:06:57,270 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:06:57,270 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2018-09-30 20:06:57,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:06:57,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:06:57,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:06:57,271 INFO L87 Difference]: Start difference. First operand 302 states and 444 transitions. Second operand 14 states. [2018-09-30 20:06:58,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:06:58,816 INFO L93 Difference]: Finished difference Result 378 states and 544 transitions. [2018-09-30 20:06:58,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:06:58,819 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-30 20:06:58,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:06:58,823 INFO L225 Difference]: With dead ends: 378 [2018-09-30 20:06:58,823 INFO L226 Difference]: Without dead ends: 376 [2018-09-30 20:06:58,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=307, Invalid=815, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:06:58,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2018-09-30 20:06:58,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 301. [2018-09-30 20:06:58,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2018-09-30 20:06:58,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 443 transitions. [2018-09-30 20:06:58,897 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 443 transitions. Word has length 14 [2018-09-30 20:06:58,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:06:58,899 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 443 transitions. [2018-09-30 20:06:58,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:06:58,899 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 443 transitions. [2018-09-30 20:06:58,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 20:06:58,900 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:06:58,900 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:06:58,900 INFO L423 AbstractCegarLoop]: === Iteration 14 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:06:58,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:06:58,901 INFO L82 PathProgramCache]: Analyzing trace with hash 697427610, now seen corresponding path program 1 times [2018-09-30 20:06:58,901 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:06:58,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:06:58,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:58,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:58,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:06:58,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:59,011 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 20:06:59,012 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:06:59,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:06:59,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:06:59,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:06:59,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:06:59,193 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 20:06:59,214 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:06:59,215 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 14 [2018-09-30 20:06:59,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:06:59,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:06:59,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:06:59,216 INFO L87 Difference]: Start difference. First operand 301 states and 443 transitions. Second operand 15 states. [2018-09-30 20:07:00,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:00,888 INFO L93 Difference]: Finished difference Result 395 states and 572 transitions. [2018-09-30 20:07:00,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:07:00,888 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-09-30 20:07:00,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:00,891 INFO L225 Difference]: With dead ends: 395 [2018-09-30 20:07:00,891 INFO L226 Difference]: Without dead ends: 393 [2018-09-30 20:07:00,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=347, Invalid=1135, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 20:07:00,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2018-09-30 20:07:00,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 312. [2018-09-30 20:07:00,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2018-09-30 20:07:00,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 459 transitions. [2018-09-30 20:07:00,946 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 459 transitions. Word has length 14 [2018-09-30 20:07:00,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:00,946 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 459 transitions. [2018-09-30 20:07:00,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:07:00,947 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 459 transitions. [2018-09-30 20:07:00,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 20:07:00,947 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:00,948 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:00,948 INFO L423 AbstractCegarLoop]: === Iteration 15 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:00,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:00,948 INFO L82 PathProgramCache]: Analyzing trace with hash 697427226, now seen corresponding path program 1 times [2018-09-30 20:07:00,948 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:00,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:00,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:00,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:00,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:00,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:01,066 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 20:07:01,067 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:01,067 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 20:07:01,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:01,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:01,249 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 20:07:01,270 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:01,270 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2018-09-30 20:07:01,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:07:01,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:07:01,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:07:01,271 INFO L87 Difference]: Start difference. First operand 312 states and 459 transitions. Second operand 13 states. [2018-09-30 20:07:01,902 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-09-30 20:07:03,170 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-09-30 20:07:03,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:03,715 INFO L93 Difference]: Finished difference Result 383 states and 560 transitions. [2018-09-30 20:07:03,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 20:07:03,715 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2018-09-30 20:07:03,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:03,718 INFO L225 Difference]: With dead ends: 383 [2018-09-30 20:07:03,718 INFO L226 Difference]: Without dead ends: 381 [2018-09-30 20:07:03,719 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2018-09-30 20:07:03,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2018-09-30 20:07:03,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 328. [2018-09-30 20:07:03,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-09-30 20:07:03,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 482 transitions. [2018-09-30 20:07:03,780 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 482 transitions. Word has length 14 [2018-09-30 20:07:03,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:03,781 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 482 transitions. [2018-09-30 20:07:03,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:07:03,781 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 482 transitions. [2018-09-30 20:07:03,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:07:03,781 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:03,781 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:03,782 INFO L423 AbstractCegarLoop]: === Iteration 16 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:03,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:03,782 INFO L82 PathProgramCache]: Analyzing trace with hash 406900684, now seen corresponding path program 1 times [2018-09-30 20:07:03,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:03,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:03,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:03,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:03,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:03,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:04,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:04,541 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:04,541 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 20:07:04,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:04,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:04,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:04,757 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:04,757 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2018-09-30 20:07:04,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:07:04,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:07:04,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:07:04,758 INFO L87 Difference]: Start difference. First operand 328 states and 482 transitions. Second operand 16 states. [2018-09-30 20:07:06,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:06,172 INFO L93 Difference]: Finished difference Result 429 states and 618 transitions. [2018-09-30 20:07:06,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 20:07:06,173 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2018-09-30 20:07:06,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:06,175 INFO L225 Difference]: With dead ends: 429 [2018-09-30 20:07:06,176 INFO L226 Difference]: Without dead ends: 427 [2018-09-30 20:07:06,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=579, Invalid=1401, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 20:07:06,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2018-09-30 20:07:06,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 242. [2018-09-30 20:07:06,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-09-30 20:07:06,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 351 transitions. [2018-09-30 20:07:06,242 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 351 transitions. Word has length 17 [2018-09-30 20:07:06,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:06,243 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 351 transitions. [2018-09-30 20:07:06,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:07:06,243 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 351 transitions. [2018-09-30 20:07:06,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:07:06,244 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:06,244 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:06,244 INFO L423 AbstractCegarLoop]: === Iteration 17 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:06,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:06,245 INFO L82 PathProgramCache]: Analyzing trace with hash 2143481530, now seen corresponding path program 1 times [2018-09-30 20:07:06,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:06,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:06,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:06,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:06,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:06,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:06,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:06,522 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:06,522 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 20:07:06,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:06,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:06,697 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:06,697 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2018-09-30 20:07:06,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:07:06,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:07:06,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:07:06,698 INFO L87 Difference]: Start difference. First operand 242 states and 351 transitions. Second operand 16 states. [2018-09-30 20:07:08,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:08,193 INFO L93 Difference]: Finished difference Result 330 states and 466 transitions. [2018-09-30 20:07:08,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 20:07:08,193 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2018-09-30 20:07:08,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:08,195 INFO L225 Difference]: With dead ends: 330 [2018-09-30 20:07:08,195 INFO L226 Difference]: Without dead ends: 328 [2018-09-30 20:07:08,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=579, Invalid=1401, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 20:07:08,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2018-09-30 20:07:08,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 158. [2018-09-30 20:07:08,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-30 20:07:08,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 226 transitions. [2018-09-30 20:07:08,250 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 226 transitions. Word has length 17 [2018-09-30 20:07:08,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:08,250 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 226 transitions. [2018-09-30 20:07:08,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:07:08,250 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 226 transitions. [2018-09-30 20:07:08,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:07:08,251 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:08,251 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 20:07:08,251 INFO L423 AbstractCegarLoop]: === Iteration 18 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:08,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:08,252 INFO L82 PathProgramCache]: Analyzing trace with hash -653821292, now seen corresponding path program 1 times [2018-09-30 20:07:08,252 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:08,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:08,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:08,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:08,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:08,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:08,372 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 20:07:08,372 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:08,372 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 20:07:08,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:08,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:08,479 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 20:07:08,500 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:08,501 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2018-09-30 20:07:08,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:07:08,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:07:08,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:07:08,501 INFO L87 Difference]: Start difference. First operand 158 states and 226 transitions. Second operand 12 states. [2018-09-30 20:07:09,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:09,090 INFO L93 Difference]: Finished difference Result 271 states and 380 transitions. [2018-09-30 20:07:09,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 20:07:09,091 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2018-09-30 20:07:09,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:09,092 INFO L225 Difference]: With dead ends: 271 [2018-09-30 20:07:09,092 INFO L226 Difference]: Without dead ends: 269 [2018-09-30 20:07:09,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2018-09-30 20:07:09,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-09-30 20:07:09,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 180. [2018-09-30 20:07:09,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-09-30 20:07:09,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 258 transitions. [2018-09-30 20:07:09,167 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 258 transitions. Word has length 18 [2018-09-30 20:07:09,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:09,167 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 258 transitions. [2018-09-30 20:07:09,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:07:09,167 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 258 transitions. [2018-09-30 20:07:09,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:07:09,168 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:09,168 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 20:07:09,169 INFO L423 AbstractCegarLoop]: === Iteration 19 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:09,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:09,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1014964826, now seen corresponding path program 1 times [2018-09-30 20:07:09,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:09,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:09,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:09,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:09,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:09,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:09,570 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 20:07:09,571 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:09,571 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-30 20:07:09,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:09,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:09,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:09,718 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 20:07:09,740 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:07:09,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2018-09-30 20:07:09,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:07:09,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:07:09,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:07:09,742 INFO L87 Difference]: Start difference. First operand 180 states and 258 transitions. Second operand 13 states. [2018-09-30 20:07:12,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:12,090 INFO L93 Difference]: Finished difference Result 741 states and 1047 transitions. [2018-09-30 20:07:12,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 20:07:12,090 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-30 20:07:12,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:12,094 INFO L225 Difference]: With dead ends: 741 [2018-09-30 20:07:12,094 INFO L226 Difference]: Without dead ends: 564 [2018-09-30 20:07:12,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2559 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1290, Invalid=6192, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 20:07:12,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2018-09-30 20:07:12,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 341. [2018-09-30 20:07:12,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-09-30 20:07:12,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 486 transitions. [2018-09-30 20:07:12,234 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 486 transitions. Word has length 18 [2018-09-30 20:07:12,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:12,234 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 486 transitions. [2018-09-30 20:07:12,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:07:12,234 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 486 transitions. [2018-09-30 20:07:12,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:07:12,236 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:12,236 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 20:07:12,236 INFO L423 AbstractCegarLoop]: === Iteration 20 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:12,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:12,237 INFO L82 PathProgramCache]: Analyzing trace with hash -155045024, now seen corresponding path program 1 times [2018-09-30 20:07:12,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:12,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:12,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:12,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:12,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:12,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:12,384 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 20:07:12,384 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:12,384 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 20:07:12,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:12,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:12,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:12,497 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 20:07:12,519 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:12,519 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2018-09-30 20:07:12,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:07:12,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:07:12,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:07:12,520 INFO L87 Difference]: Start difference. First operand 341 states and 486 transitions. Second operand 13 states. [2018-09-30 20:07:14,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:14,109 INFO L93 Difference]: Finished difference Result 809 states and 1155 transitions. [2018-09-30 20:07:14,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 20:07:14,110 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-30 20:07:14,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:14,112 INFO L225 Difference]: With dead ends: 809 [2018-09-30 20:07:14,112 INFO L226 Difference]: Without dead ends: 470 [2018-09-30 20:07:14,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=462, Invalid=1518, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 20:07:14,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2018-09-30 20:07:14,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 368. [2018-09-30 20:07:14,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2018-09-30 20:07:14,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 523 transitions. [2018-09-30 20:07:14,267 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 523 transitions. Word has length 18 [2018-09-30 20:07:14,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:14,268 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 523 transitions. [2018-09-30 20:07:14,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:07:14,268 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 523 transitions. [2018-09-30 20:07:14,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:07:14,269 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:14,269 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 20:07:14,269 INFO L423 AbstractCegarLoop]: === Iteration 21 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:14,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:14,270 INFO L82 PathProgramCache]: Analyzing trace with hash 393788879, now seen corresponding path program 1 times [2018-09-30 20:07:14,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:14,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:14,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:14,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:14,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:14,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:14,386 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 20:07:14,387 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:14,387 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 20:07:14,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:14,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:14,516 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 20:07:14,537 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:14,538 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-30 20:07:14,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:07:14,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:07:14,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:07:14,538 INFO L87 Difference]: Start difference. First operand 368 states and 523 transitions. Second operand 13 states. [2018-09-30 20:07:16,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:16,264 INFO L93 Difference]: Finished difference Result 1106 states and 1568 transitions. [2018-09-30 20:07:16,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 20:07:16,264 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-30 20:07:16,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:16,267 INFO L225 Difference]: With dead ends: 1106 [2018-09-30 20:07:16,267 INFO L226 Difference]: Without dead ends: 724 [2018-09-30 20:07:16,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=678, Invalid=2628, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 20:07:16,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2018-09-30 20:07:16,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 519. [2018-09-30 20:07:16,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 519 states. [2018-09-30 20:07:16,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 739 transitions. [2018-09-30 20:07:16,448 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 739 transitions. Word has length 18 [2018-09-30 20:07:16,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:16,449 INFO L480 AbstractCegarLoop]: Abstraction has 519 states and 739 transitions. [2018-09-30 20:07:16,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:07:16,449 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 739 transitions. [2018-09-30 20:07:16,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:07:16,450 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:16,450 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 20:07:16,450 INFO L423 AbstractCegarLoop]: === Iteration 22 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:16,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:16,451 INFO L82 PathProgramCache]: Analyzing trace with hash -216264799, now seen corresponding path program 1 times [2018-09-30 20:07:16,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:16,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:16,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:16,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:16,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:16,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:16,536 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 20:07:16,537 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:16,537 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 20:07:16,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:16,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:16,619 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 20:07:16,642 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:16,642 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2018-09-30 20:07:16,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:07:16,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:07:16,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:07:16,644 INFO L87 Difference]: Start difference. First operand 519 states and 739 transitions. Second operand 11 states. [2018-09-30 20:07:17,428 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-30 20:07:17,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:17,886 INFO L93 Difference]: Finished difference Result 711 states and 1002 transitions. [2018-09-30 20:07:17,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:07:17,889 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2018-09-30 20:07:17,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:17,892 INFO L225 Difference]: With dead ends: 711 [2018-09-30 20:07:17,892 INFO L226 Difference]: Without dead ends: 709 [2018-09-30 20:07:17,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2018-09-30 20:07:17,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2018-09-30 20:07:18,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 498. [2018-09-30 20:07:18,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498 states. [2018-09-30 20:07:18,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 704 transitions. [2018-09-30 20:07:18,090 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 704 transitions. Word has length 18 [2018-09-30 20:07:18,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:18,090 INFO L480 AbstractCegarLoop]: Abstraction has 498 states and 704 transitions. [2018-09-30 20:07:18,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:07:18,090 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 704 transitions. [2018-09-30 20:07:18,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:07:18,091 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:18,091 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 20:07:18,092 INFO L423 AbstractCegarLoop]: === Iteration 23 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:18,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:18,092 INFO L82 PathProgramCache]: Analyzing trace with hash 983482113, now seen corresponding path program 1 times [2018-09-30 20:07:18,092 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:18,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:18,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:18,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:18,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:18,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:18,282 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 20:07:18,282 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:18,282 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 20:07:18,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:18,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:18,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:18,535 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 20:07:18,557 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:07:18,557 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 13 [2018-09-30 20:07:18,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:07:18,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:07:18,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:07:18,558 INFO L87 Difference]: Start difference. First operand 498 states and 704 transitions. Second operand 13 states. [2018-09-30 20:07:20,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:20,541 INFO L93 Difference]: Finished difference Result 1319 states and 1864 transitions. [2018-09-30 20:07:20,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 20:07:20,542 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-30 20:07:20,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:20,545 INFO L225 Difference]: With dead ends: 1319 [2018-09-30 20:07:20,545 INFO L226 Difference]: Without dead ends: 823 [2018-09-30 20:07:20,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=477, Invalid=1415, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 20:07:20,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2018-09-30 20:07:20,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 566. [2018-09-30 20:07:20,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2018-09-30 20:07:20,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 809 transitions. [2018-09-30 20:07:20,755 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 809 transitions. Word has length 18 [2018-09-30 20:07:20,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:20,755 INFO L480 AbstractCegarLoop]: Abstraction has 566 states and 809 transitions. [2018-09-30 20:07:20,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:07:20,755 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 809 transitions. [2018-09-30 20:07:20,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:07:20,756 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:20,756 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 20:07:20,756 INFO L423 AbstractCegarLoop]: === Iteration 24 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:20,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:20,757 INFO L82 PathProgramCache]: Analyzing trace with hash 801556786, now seen corresponding path program 1 times [2018-09-30 20:07:20,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:20,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:20,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:20,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:20,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:20,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:20,928 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 20:07:20,928 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:20,928 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 20:07:20,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:20,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:21,047 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 20:07:21,067 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:21,067 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2018-09-30 20:07:21,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:07:21,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:07:21,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:07:21,068 INFO L87 Difference]: Start difference. First operand 566 states and 809 transitions. Second operand 12 states. [2018-09-30 20:07:21,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:21,848 INFO L93 Difference]: Finished difference Result 766 states and 1086 transitions. [2018-09-30 20:07:21,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 20:07:21,849 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2018-09-30 20:07:21,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:21,851 INFO L225 Difference]: With dead ends: 766 [2018-09-30 20:07:21,851 INFO L226 Difference]: Without dead ends: 764 [2018-09-30 20:07:21,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2018-09-30 20:07:21,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2018-09-30 20:07:22,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 608. [2018-09-30 20:07:22,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608 states. [2018-09-30 20:07:22,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 869 transitions. [2018-09-30 20:07:22,052 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 869 transitions. Word has length 18 [2018-09-30 20:07:22,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:22,053 INFO L480 AbstractCegarLoop]: Abstraction has 608 states and 869 transitions. [2018-09-30 20:07:22,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:07:22,053 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 869 transitions. [2018-09-30 20:07:22,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:07:22,054 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:22,054 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 20:07:22,054 INFO L423 AbstractCegarLoop]: === Iteration 25 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:22,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:22,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1593301430, now seen corresponding path program 1 times [2018-09-30 20:07:22,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:22,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:22,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:22,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:22,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:22,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:22,242 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 20:07:22,242 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:22,242 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 20:07:22,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:22,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:22,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:22,372 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 20:07:22,391 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:07:22,392 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2018-09-30 20:07:22,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:07:22,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:07:22,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:07:22,393 INFO L87 Difference]: Start difference. First operand 608 states and 869 transitions. Second operand 13 states. [2018-09-30 20:07:25,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:25,582 INFO L93 Difference]: Finished difference Result 2095 states and 2968 transitions. [2018-09-30 20:07:25,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 20:07:25,583 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-30 20:07:25,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:25,588 INFO L225 Difference]: With dead ends: 2095 [2018-09-30 20:07:25,588 INFO L226 Difference]: Without dead ends: 1329 [2018-09-30 20:07:25,593 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2559 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1290, Invalid=6192, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 20:07:25,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2018-09-30 20:07:25,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 992. [2018-09-30 20:07:25,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2018-09-30 20:07:25,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1402 transitions. [2018-09-30 20:07:25,923 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1402 transitions. Word has length 18 [2018-09-30 20:07:25,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:25,923 INFO L480 AbstractCegarLoop]: Abstraction has 992 states and 1402 transitions. [2018-09-30 20:07:25,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:07:25,923 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1402 transitions. [2018-09-30 20:07:25,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:07:25,924 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:25,924 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 20:07:25,925 INFO L423 AbstractCegarLoop]: === Iteration 26 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:25,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:25,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1366841759, now seen corresponding path program 1 times [2018-09-30 20:07:25,925 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:25,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:25,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:25,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:25,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:26,176 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 20:07:26,176 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:26,176 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 20:07:26,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:26,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:26,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:26,244 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 20:07:26,265 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:26,265 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2018-09-30 20:07:26,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:07:26,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:07:26,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:07:26,266 INFO L87 Difference]: Start difference. First operand 992 states and 1402 transitions. Second operand 11 states. [2018-09-30 20:07:27,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:27,605 INFO L93 Difference]: Finished difference Result 1291 states and 1819 transitions. [2018-09-30 20:07:27,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:07:27,605 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2018-09-30 20:07:27,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:27,611 INFO L225 Difference]: With dead ends: 1291 [2018-09-30 20:07:27,611 INFO L226 Difference]: Without dead ends: 1289 [2018-09-30 20:07:27,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2018-09-30 20:07:27,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2018-09-30 20:07:27,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1028. [2018-09-30 20:07:27,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1028 states. [2018-09-30 20:07:27,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1454 transitions. [2018-09-30 20:07:27,957 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1454 transitions. Word has length 18 [2018-09-30 20:07:27,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:27,957 INFO L480 AbstractCegarLoop]: Abstraction has 1028 states and 1454 transitions. [2018-09-30 20:07:27,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:07:27,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1454 transitions. [2018-09-30 20:07:27,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:07:27,958 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:27,958 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 20:07:27,959 INFO L423 AbstractCegarLoop]: === Iteration 27 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:27,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:27,959 INFO L82 PathProgramCache]: Analyzing trace with hash -817918193, now seen corresponding path program 1 times [2018-09-30 20:07:27,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:27,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:27,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:27,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:27,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:27,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:28,086 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 20:07:28,087 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:28,087 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 20:07:28,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:28,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:28,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:28,192 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 20:07:28,214 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 20:07:28,214 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 13 [2018-09-30 20:07:28,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:07:28,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:07:28,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:07:28,215 INFO L87 Difference]: Start difference. First operand 1028 states and 1454 transitions. Second operand 13 states. [2018-09-30 20:07:29,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:29,956 INFO L93 Difference]: Finished difference Result 2222 states and 3144 transitions. [2018-09-30 20:07:29,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 20:07:29,957 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-30 20:07:29,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:29,961 INFO L225 Difference]: With dead ends: 2222 [2018-09-30 20:07:29,961 INFO L226 Difference]: Without dead ends: 1132 [2018-09-30 20:07:29,966 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=477, Invalid=1415, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 20:07:29,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2018-09-30 20:07:30,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 831. [2018-09-30 20:07:30,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 831 states. [2018-09-30 20:07:30,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1173 transitions. [2018-09-30 20:07:30,273 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1173 transitions. Word has length 18 [2018-09-30 20:07:30,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:30,273 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 1173 transitions. [2018-09-30 20:07:30,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:07:30,274 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1173 transitions. [2018-09-30 20:07:30,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:07:30,275 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:30,275 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 20:07:30,275 INFO L423 AbstractCegarLoop]: === Iteration 28 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:30,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:30,275 INFO L82 PathProgramCache]: Analyzing trace with hash -228224959, now seen corresponding path program 1 times [2018-09-30 20:07:30,276 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:30,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:30,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:30,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:30,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:30,405 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 20:07:30,406 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:30,406 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 20:07:30,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:30,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:30,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:30,530 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 20:07:30,551 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:30,551 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-30 20:07:30,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:07:30,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:07:30,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:07:30,552 INFO L87 Difference]: Start difference. First operand 831 states and 1173 transitions. Second operand 13 states. [2018-09-30 20:07:32,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:32,610 INFO L93 Difference]: Finished difference Result 1989 states and 2785 transitions. [2018-09-30 20:07:32,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 20:07:32,611 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-30 20:07:32,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:32,615 INFO L225 Difference]: With dead ends: 1989 [2018-09-30 20:07:32,615 INFO L226 Difference]: Without dead ends: 1130 [2018-09-30 20:07:32,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=678, Invalid=2628, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 20:07:32,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2018-09-30 20:07:32,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 806. [2018-09-30 20:07:32,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 806 states. [2018-09-30 20:07:32,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1135 transitions. [2018-09-30 20:07:32,903 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1135 transitions. Word has length 18 [2018-09-30 20:07:32,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:32,903 INFO L480 AbstractCegarLoop]: Abstraction has 806 states and 1135 transitions. [2018-09-30 20:07:32,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:07:32,903 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1135 transitions. [2018-09-30 20:07:32,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 20:07:32,904 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:32,905 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:32,905 INFO L423 AbstractCegarLoop]: === Iteration 29 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:32,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:32,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1122647006, now seen corresponding path program 1 times [2018-09-30 20:07:32,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:32,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:32,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:32,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:32,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:33,026 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 20:07:33,026 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:33,026 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 20:07:33,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:33,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:33,133 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 20:07:33,155 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:33,155 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-09-30 20:07:33,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:07:33,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:07:33,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:07:33,156 INFO L87 Difference]: Start difference. First operand 806 states and 1135 transitions. Second operand 11 states. [2018-09-30 20:07:34,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:34,534 INFO L93 Difference]: Finished difference Result 1022 states and 1428 transitions. [2018-09-30 20:07:34,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:07:34,534 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2018-09-30 20:07:34,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:34,539 INFO L225 Difference]: With dead ends: 1022 [2018-09-30 20:07:34,539 INFO L226 Difference]: Without dead ends: 1020 [2018-09-30 20:07:34,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=203, Invalid=727, Unknown=0, NotChecked=0, Total=930 [2018-09-30 20:07:34,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2018-09-30 20:07:34,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 838. [2018-09-30 20:07:34,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 838 states. [2018-09-30 20:07:34,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1182 transitions. [2018-09-30 20:07:34,828 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1182 transitions. Word has length 22 [2018-09-30 20:07:34,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:34,829 INFO L480 AbstractCegarLoop]: Abstraction has 838 states and 1182 transitions. [2018-09-30 20:07:34,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:07:34,829 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1182 transitions. [2018-09-30 20:07:34,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 20:07:34,830 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:34,830 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:34,830 INFO L423 AbstractCegarLoop]: === Iteration 30 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:34,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:34,830 INFO L82 PathProgramCache]: Analyzing trace with hash 15880131, now seen corresponding path program 1 times [2018-09-30 20:07:34,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:34,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:34,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:34,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:34,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:35,167 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 20:07:35,168 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:35,168 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:07:35,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:35,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:35,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:35,249 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 20:07:35,270 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:35,270 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-09-30 20:07:35,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:07:35,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:07:35,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:07:35,271 INFO L87 Difference]: Start difference. First operand 838 states and 1182 transitions. Second operand 10 states. [2018-09-30 20:07:36,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:36,912 INFO L93 Difference]: Finished difference Result 1127 states and 1575 transitions. [2018-09-30 20:07:36,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:07:36,913 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2018-09-30 20:07:36,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:36,916 INFO L225 Difference]: With dead ends: 1127 [2018-09-30 20:07:36,916 INFO L226 Difference]: Without dead ends: 1125 [2018-09-30 20:07:36,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2018-09-30 20:07:36,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2018-09-30 20:07:37,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 852. [2018-09-30 20:07:37,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 852 states. [2018-09-30 20:07:37,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1203 transitions. [2018-09-30 20:07:37,225 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1203 transitions. Word has length 22 [2018-09-30 20:07:37,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:37,225 INFO L480 AbstractCegarLoop]: Abstraction has 852 states and 1203 transitions. [2018-09-30 20:07:37,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:07:37,225 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1203 transitions. [2018-09-30 20:07:37,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 20:07:37,227 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:37,227 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:37,227 INFO L423 AbstractCegarLoop]: === Iteration 31 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:37,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:37,227 INFO L82 PathProgramCache]: Analyzing trace with hash -510719313, now seen corresponding path program 1 times [2018-09-30 20:07:37,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:37,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:37,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:37,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:37,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:37,329 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 20:07:37,329 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:37,330 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 20:07:37,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:37,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:37,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:37,914 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 20:07:37,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:37,954 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-30 20:07:37,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:07:37,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:07:37,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:07:37,955 INFO L87 Difference]: Start difference. First operand 852 states and 1203 transitions. Second operand 14 states. [2018-09-30 20:07:40,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:40,360 INFO L93 Difference]: Finished difference Result 1127 states and 1578 transitions. [2018-09-30 20:07:40,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 20:07:40,360 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2018-09-30 20:07:40,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:40,366 INFO L225 Difference]: With dead ends: 1127 [2018-09-30 20:07:40,366 INFO L226 Difference]: Without dead ends: 1125 [2018-09-30 20:07:40,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=548, Invalid=1432, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 20:07:40,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2018-09-30 20:07:40,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 830. [2018-09-30 20:07:40,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 830 states. [2018-09-30 20:07:40,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1171 transitions. [2018-09-30 20:07:40,673 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1171 transitions. Word has length 22 [2018-09-30 20:07:40,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:40,674 INFO L480 AbstractCegarLoop]: Abstraction has 830 states and 1171 transitions. [2018-09-30 20:07:40,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:07:40,674 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1171 transitions. [2018-09-30 20:07:40,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 20:07:40,675 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:40,675 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:40,676 INFO L423 AbstractCegarLoop]: === Iteration 32 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:40,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:40,676 INFO L82 PathProgramCache]: Analyzing trace with hash 627807824, now seen corresponding path program 1 times [2018-09-30 20:07:40,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:40,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:40,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:40,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:40,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:40,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:40,990 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 20:07:40,990 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:40,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:07:41,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:41,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:41,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:41,146 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 20:07:41,169 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:41,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2018-09-30 20:07:41,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:07:41,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:07:41,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:07:41,170 INFO L87 Difference]: Start difference. First operand 830 states and 1171 transitions. Second operand 15 states. [2018-09-30 20:07:42,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:42,749 INFO L93 Difference]: Finished difference Result 1072 states and 1499 transitions. [2018-09-30 20:07:42,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 20:07:42,749 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2018-09-30 20:07:42,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:42,753 INFO L225 Difference]: With dead ends: 1072 [2018-09-30 20:07:42,753 INFO L226 Difference]: Without dead ends: 1070 [2018-09-30 20:07:42,754 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 20:07:42,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2018-09-30 20:07:43,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 788. [2018-09-30 20:07:43,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 788 states. [2018-09-30 20:07:43,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1104 transitions. [2018-09-30 20:07:43,043 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1104 transitions. Word has length 22 [2018-09-30 20:07:43,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:43,044 INFO L480 AbstractCegarLoop]: Abstraction has 788 states and 1104 transitions. [2018-09-30 20:07:43,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:07:43,044 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1104 transitions. [2018-09-30 20:07:43,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 20:07:43,045 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:43,045 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:43,046 INFO L423 AbstractCegarLoop]: === Iteration 33 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:43,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:43,046 INFO L82 PathProgramCache]: Analyzing trace with hash 345073063, now seen corresponding path program 1 times [2018-09-30 20:07:43,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:43,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:43,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:43,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:43,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:43,197 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 20:07:43,197 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:43,197 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 20:07:43,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:43,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:43,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:43,273 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 20:07:43,294 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:43,294 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-09-30 20:07:43,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:07:43,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:07:43,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:07:43,295 INFO L87 Difference]: Start difference. First operand 788 states and 1104 transitions. Second operand 10 states. [2018-09-30 20:07:44,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:44,675 INFO L93 Difference]: Finished difference Result 1025 states and 1426 transitions. [2018-09-30 20:07:44,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:07:44,675 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2018-09-30 20:07:44,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:44,679 INFO L225 Difference]: With dead ends: 1025 [2018-09-30 20:07:44,679 INFO L226 Difference]: Without dead ends: 1023 [2018-09-30 20:07:44,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2018-09-30 20:07:44,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2018-09-30 20:07:44,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 818. [2018-09-30 20:07:44,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 818 states. [2018-09-30 20:07:44,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1149 transitions. [2018-09-30 20:07:44,982 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1149 transitions. Word has length 22 [2018-09-30 20:07:44,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:44,982 INFO L480 AbstractCegarLoop]: Abstraction has 818 states and 1149 transitions. [2018-09-30 20:07:44,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:07:44,982 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1149 transitions. [2018-09-30 20:07:44,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 20:07:44,984 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:44,984 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:44,984 INFO L423 AbstractCegarLoop]: === Iteration 34 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:44,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:44,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1613894486, now seen corresponding path program 1 times [2018-09-30 20:07:44,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:44,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:44,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:44,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:44,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:44,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:45,171 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 20:07:45,171 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:45,171 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 20:07:45,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:45,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:45,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:45,288 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 20:07:45,310 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:45,310 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2018-09-30 20:07:45,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:07:45,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:07:45,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:07:45,311 INFO L87 Difference]: Start difference. First operand 818 states and 1149 transitions. Second operand 15 states. [2018-09-30 20:07:46,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:46,995 INFO L93 Difference]: Finished difference Result 1057 states and 1481 transitions. [2018-09-30 20:07:46,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 20:07:46,996 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2018-09-30 20:07:46,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:46,999 INFO L225 Difference]: With dead ends: 1057 [2018-09-30 20:07:46,999 INFO L226 Difference]: Without dead ends: 1055 [2018-09-30 20:07:47,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 20:07:47,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2018-09-30 20:07:47,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 770. [2018-09-30 20:07:47,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 770 states. [2018-09-30 20:07:47,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1073 transitions. [2018-09-30 20:07:47,311 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1073 transitions. Word has length 22 [2018-09-30 20:07:47,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:47,311 INFO L480 AbstractCegarLoop]: Abstraction has 770 states and 1073 transitions. [2018-09-30 20:07:47,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:07:47,312 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1073 transitions. [2018-09-30 20:07:47,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 20:07:47,313 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:47,313 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:47,313 INFO L423 AbstractCegarLoop]: === Iteration 35 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:47,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:47,313 INFO L82 PathProgramCache]: Analyzing trace with hash -488650854, now seen corresponding path program 1 times [2018-09-30 20:07:47,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:47,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:47,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:47,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:47,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:48,266 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:48,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:48,266 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:07:48,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:48,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:49,023 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 20:07:49,044 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:49,045 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-30 20:07:49,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:07:49,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:07:49,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:07:49,045 INFO L87 Difference]: Start difference. First operand 770 states and 1073 transitions. Second operand 15 states. [2018-09-30 20:07:51,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:51,790 INFO L93 Difference]: Finished difference Result 1779 states and 2438 transitions. [2018-09-30 20:07:51,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 20:07:51,791 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2018-09-30 20:07:51,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:51,796 INFO L225 Difference]: With dead ends: 1779 [2018-09-30 20:07:51,796 INFO L226 Difference]: Without dead ends: 1507 [2018-09-30 20:07:51,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1037, Invalid=3655, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 20:07:51,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2018-09-30 20:07:52,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1174. [2018-09-30 20:07:52,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1174 states. [2018-09-30 20:07:52,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1623 transitions. [2018-09-30 20:07:52,274 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1623 transitions. Word has length 25 [2018-09-30 20:07:52,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:52,274 INFO L480 AbstractCegarLoop]: Abstraction has 1174 states and 1623 transitions. [2018-09-30 20:07:52,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:07:52,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1623 transitions. [2018-09-30 20:07:52,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 20:07:52,276 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:52,276 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:52,276 INFO L423 AbstractCegarLoop]: === Iteration 36 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:52,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:52,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1608047085, now seen corresponding path program 1 times [2018-09-30 20:07:52,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:52,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:52,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:52,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:52,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:52,413 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 20:07:52,414 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:52,414 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 20:07:52,427 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:52,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:52,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:52,533 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 20:07:52,553 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:52,553 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-30 20:07:52,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:07:52,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:07:52,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:07:52,554 INFO L87 Difference]: Start difference. First operand 1174 states and 1623 transitions. Second operand 15 states. [2018-09-30 20:07:55,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:55,200 INFO L93 Difference]: Finished difference Result 2685 states and 3700 transitions. [2018-09-30 20:07:55,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 20:07:55,200 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2018-09-30 20:07:55,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:55,206 INFO L225 Difference]: With dead ends: 2685 [2018-09-30 20:07:55,206 INFO L226 Difference]: Without dead ends: 1652 [2018-09-30 20:07:55,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=2758, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 20:07:55,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2018-09-30 20:07:55,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1212. [2018-09-30 20:07:55,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1212 states. [2018-09-30 20:07:55,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1681 transitions. [2018-09-30 20:07:55,662 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1681 transitions. Word has length 25 [2018-09-30 20:07:55,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:55,662 INFO L480 AbstractCegarLoop]: Abstraction has 1212 states and 1681 transitions. [2018-09-30 20:07:55,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:07:55,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1681 transitions. [2018-09-30 20:07:55,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 20:07:55,664 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:55,664 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:55,664 INFO L423 AbstractCegarLoop]: === Iteration 37 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:55,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:55,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1101622072, now seen corresponding path program 1 times [2018-09-30 20:07:55,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:55,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:55,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:55,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:55,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:55,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:55,865 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:55,866 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:55,866 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 20:07:55,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:55,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:55,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:55,984 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 20:07:56,004 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:56,005 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-30 20:07:56,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:07:56,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:07:56,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:07:56,005 INFO L87 Difference]: Start difference. First operand 1212 states and 1681 transitions. Second operand 15 states. [2018-09-30 20:07:58,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:58,786 INFO L93 Difference]: Finished difference Result 2130 states and 2907 transitions. [2018-09-30 20:07:58,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 20:07:58,786 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2018-09-30 20:07:58,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:58,794 INFO L225 Difference]: With dead ends: 2130 [2018-09-30 20:07:58,794 INFO L226 Difference]: Without dead ends: 1946 [2018-09-30 20:07:58,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1010, Invalid=3546, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 20:07:58,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2018-09-30 20:07:59,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1616. [2018-09-30 20:07:59,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1616 states. [2018-09-30 20:07:59,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 2248 transitions. [2018-09-30 20:07:59,434 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 2248 transitions. Word has length 25 [2018-09-30 20:07:59,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:59,434 INFO L480 AbstractCegarLoop]: Abstraction has 1616 states and 2248 transitions. [2018-09-30 20:07:59,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:07:59,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 2248 transitions. [2018-09-30 20:07:59,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 20:07:59,436 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:59,436 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:07:59,437 INFO L423 AbstractCegarLoop]: === Iteration 38 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:59,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:59,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1649781575, now seen corresponding path program 1 times [2018-09-30 20:07:59,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:59,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:59,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:59,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:59,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:59,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:59,613 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 20:07:59,614 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:59,614 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 20:07:59,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:59,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:59,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:59,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 20:07:59,848 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:59,849 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-30 20:07:59,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:07:59,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:07:59,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:07:59,849 INFO L87 Difference]: Start difference. First operand 1616 states and 2248 transitions. Second operand 15 states. [2018-09-30 20:08:02,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:02,806 INFO L93 Difference]: Finished difference Result 3372 states and 4705 transitions. [2018-09-30 20:08:02,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 20:08:02,807 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2018-09-30 20:08:02,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:02,815 INFO L225 Difference]: With dead ends: 3372 [2018-09-30 20:08:02,816 INFO L226 Difference]: Without dead ends: 2040 [2018-09-30 20:08:02,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=782, Invalid=2758, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 20:08:02,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2018-09-30 20:08:03,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1575. [2018-09-30 20:08:03,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1575 states. [2018-09-30 20:08:03,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 2199 transitions. [2018-09-30 20:08:03,436 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 2199 transitions. Word has length 25 [2018-09-30 20:08:03,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:03,437 INFO L480 AbstractCegarLoop]: Abstraction has 1575 states and 2199 transitions. [2018-09-30 20:08:03,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:08:03,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 2199 transitions. [2018-09-30 20:08:03,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 20:08:03,439 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:03,439 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:08:03,439 INFO L423 AbstractCegarLoop]: === Iteration 39 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:03,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:03,440 INFO L82 PathProgramCache]: Analyzing trace with hash -664447164, now seen corresponding path program 2 times [2018-09-30 20:08:03,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:03,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:03,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:03,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:08:03,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:03,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:03,781 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:03,782 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 20:08:03,789 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:08:03,840 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:08:03,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:08:03,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:04,066 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:04,087 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:04,087 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-09-30 20:08:04,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:08:04,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:08:04,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:08:04,088 INFO L87 Difference]: Start difference. First operand 1575 states and 2199 transitions. Second operand 20 states. [2018-09-30 20:08:11,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:11,115 INFO L93 Difference]: Finished difference Result 2646 states and 3763 transitions. [2018-09-30 20:08:11,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 20:08:11,115 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2018-09-30 20:08:11,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:11,127 INFO L225 Difference]: With dead ends: 2646 [2018-09-30 20:08:11,127 INFO L226 Difference]: Without dead ends: 2644 [2018-09-30 20:08:11,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4956 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3132, Invalid=9524, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 20:08:11,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2018-09-30 20:08:11,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 1833. [2018-09-30 20:08:11,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1833 states. [2018-09-30 20:08:11,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 2576 transitions. [2018-09-30 20:08:11,811 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 2576 transitions. Word has length 29 [2018-09-30 20:08:11,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:11,812 INFO L480 AbstractCegarLoop]: Abstraction has 1833 states and 2576 transitions. [2018-09-30 20:08:11,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:08:11,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 2576 transitions. [2018-09-30 20:08:11,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 20:08:11,813 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:11,813 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:08:11,814 INFO L423 AbstractCegarLoop]: === Iteration 40 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:11,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:11,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1030242552, now seen corresponding path program 2 times [2018-09-30 20:08:11,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:11,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:11,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:11,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:08:11,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:12,167 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:12,167 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:12,167 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 20:08:12,174 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:08:12,223 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:08:12,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:08:12,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:12,385 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:12,407 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:12,407 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2018-09-30 20:08:12,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 20:08:12,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 20:08:12,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2018-09-30 20:08:12,408 INFO L87 Difference]: Start difference. First operand 1833 states and 2576 transitions. Second operand 21 states. [2018-09-30 20:08:19,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:19,360 INFO L93 Difference]: Finished difference Result 2887 states and 4117 transitions. [2018-09-30 20:08:19,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 20:08:19,360 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2018-09-30 20:08:19,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:19,366 INFO L225 Difference]: With dead ends: 2887 [2018-09-30 20:08:19,366 INFO L226 Difference]: Without dead ends: 2885 [2018-09-30 20:08:19,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 5023 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3166, Invalid=9716, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 20:08:19,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2018-09-30 20:08:20,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2102. [2018-09-30 20:08:20,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2102 states. [2018-09-30 20:08:20,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 2970 transitions. [2018-09-30 20:08:20,178 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 2970 transitions. Word has length 29 [2018-09-30 20:08:20,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:20,179 INFO L480 AbstractCegarLoop]: Abstraction has 2102 states and 2970 transitions. [2018-09-30 20:08:20,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 20:08:20,179 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 2970 transitions. [2018-09-30 20:08:20,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 20:08:20,181 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:20,181 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:08:20,182 INFO L423 AbstractCegarLoop]: === Iteration 41 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:20,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:20,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1174012687, now seen corresponding path program 2 times [2018-09-30 20:08:20,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:20,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:20,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:20,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:08:20,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:20,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-30 20:08:20,535 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:20,535 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 20:08:20,543 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:08:20,601 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:08:20,601 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:08:20,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 20:08:21,071 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:21,071 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2018-09-30 20:08:21,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:08:21,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:08:21,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:08:21,072 INFO L87 Difference]: Start difference. First operand 2102 states and 2970 transitions. Second operand 16 states. [2018-09-30 20:08:26,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:26,388 INFO L93 Difference]: Finished difference Result 6948 states and 9725 transitions. [2018-09-30 20:08:26,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-30 20:08:26,388 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2018-09-30 20:08:26,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:26,399 INFO L225 Difference]: With dead ends: 6948 [2018-09-30 20:08:26,399 INFO L226 Difference]: Without dead ends: 4896 [2018-09-30 20:08:26,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6484 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2880, Invalid=14150, Unknown=0, NotChecked=0, Total=17030 [2018-09-30 20:08:26,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4896 states. [2018-09-30 20:08:27,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4896 to 3634. [2018-09-30 20:08:27,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3634 states. [2018-09-30 20:08:27,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 5080 transitions. [2018-09-30 20:08:27,899 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 5080 transitions. Word has length 33 [2018-09-30 20:08:27,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:27,900 INFO L480 AbstractCegarLoop]: Abstraction has 3634 states and 5080 transitions. [2018-09-30 20:08:27,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:08:27,900 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 5080 transitions. [2018-09-30 20:08:27,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 20:08:27,903 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:27,903 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:08:27,903 INFO L423 AbstractCegarLoop]: === Iteration 42 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:27,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:27,903 INFO L82 PathProgramCache]: Analyzing trace with hash -2110003385, now seen corresponding path program 1 times [2018-09-30 20:08:27,904 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:27,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:27,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:27,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:08:27,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:27,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:28,090 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:28,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:28,091 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 20:08:28,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:08:28,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:28,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:28,266 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 20:08:28,288 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:28,288 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2018-09-30 20:08:28,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:08:28,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:08:28,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:08:28,289 INFO L87 Difference]: Start difference. First operand 3634 states and 5080 transitions. Second operand 18 states. [2018-09-30 20:08:34,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:34,997 INFO L93 Difference]: Finished difference Result 5436 states and 7576 transitions. [2018-09-30 20:08:34,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 20:08:34,998 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2018-09-30 20:08:34,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:35,010 INFO L225 Difference]: With dead ends: 5436 [2018-09-30 20:08:35,010 INFO L226 Difference]: Without dead ends: 5349 [2018-09-30 20:08:35,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2508 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1401, Invalid=6609, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 20:08:35,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5349 states. [2018-09-30 20:08:36,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5349 to 4022. [2018-09-30 20:08:36,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4022 states. [2018-09-30 20:08:36,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4022 states to 4022 states and 5648 transitions. [2018-09-30 20:08:36,693 INFO L78 Accepts]: Start accepts. Automaton has 4022 states and 5648 transitions. Word has length 33 [2018-09-30 20:08:36,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:36,693 INFO L480 AbstractCegarLoop]: Abstraction has 4022 states and 5648 transitions. [2018-09-30 20:08:36,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:08:36,694 INFO L276 IsEmpty]: Start isEmpty. Operand 4022 states and 5648 transitions. [2018-09-30 20:08:36,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 20:08:36,696 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:36,697 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:08:36,697 INFO L423 AbstractCegarLoop]: === Iteration 43 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:36,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:36,697 INFO L82 PathProgramCache]: Analyzing trace with hash -895180230, now seen corresponding path program 3 times [2018-09-30 20:08:36,697 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:36,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:36,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:36,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:08:36,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:37,097 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:37,097 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:37,097 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 20:08:37,104 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:08:37,161 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 20:08:37,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:08:37,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:38,551 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 20:08:38,571 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:38,571 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2018-09-30 20:08:38,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:08:38,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:08:38,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:08:38,572 INFO L87 Difference]: Start difference. First operand 4022 states and 5648 transitions. Second operand 22 states. [2018-09-30 20:08:50,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:50,672 INFO L93 Difference]: Finished difference Result 8032 states and 11417 transitions. [2018-09-30 20:08:50,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-09-30 20:08:50,672 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 33 [2018-09-30 20:08:50,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:50,689 INFO L225 Difference]: With dead ends: 8032 [2018-09-30 20:08:50,689 INFO L226 Difference]: Without dead ends: 7935 [2018-09-30 20:08:50,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8181 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=4070, Invalid=17686, Unknown=0, NotChecked=0, Total=21756 [2018-09-30 20:08:50,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7935 states. [2018-09-30 20:08:52,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7935 to 4327. [2018-09-30 20:08:52,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4327 states. [2018-09-30 20:08:52,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4327 states to 4327 states and 6121 transitions. [2018-09-30 20:08:52,588 INFO L78 Accepts]: Start accepts. Automaton has 4327 states and 6121 transitions. Word has length 33 [2018-09-30 20:08:52,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:52,588 INFO L480 AbstractCegarLoop]: Abstraction has 4327 states and 6121 transitions. [2018-09-30 20:08:52,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:08:52,588 INFO L276 IsEmpty]: Start isEmpty. Operand 4327 states and 6121 transitions. [2018-09-30 20:08:52,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 20:08:52,592 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:52,592 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:08:52,592 INFO L423 AbstractCegarLoop]: === Iteration 44 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:52,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:52,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1250173630, now seen corresponding path program 1 times [2018-09-30 20:08:52,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:52,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:52,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:52,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:08:52,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:52,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:52,722 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 20:08:52,722 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:52,723 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 20:08:52,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:08:52,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:52,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:52,914 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 20:08:52,933 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:52,934 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2018-09-30 20:08:52,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 20:08:52,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 20:08:52,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:08:52,935 INFO L87 Difference]: Start difference. First operand 4327 states and 6121 transitions. Second operand 19 states. [2018-09-30 20:09:01,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:09:01,289 INFO L93 Difference]: Finished difference Result 9177 states and 12958 transitions. [2018-09-30 20:09:01,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 20:09:01,289 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2018-09-30 20:09:01,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:09:01,307 INFO L225 Difference]: With dead ends: 9177 [2018-09-30 20:09:01,307 INFO L226 Difference]: Without dead ends: 5991 [2018-09-30 20:09:01,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4514 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2969, Invalid=11311, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 20:09:01,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5991 states. [2018-09-30 20:09:03,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5991 to 4147. [2018-09-30 20:09:03,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4147 states. [2018-09-30 20:09:03,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4147 states to 4147 states and 5817 transitions. [2018-09-30 20:09:03,218 INFO L78 Accepts]: Start accepts. Automaton has 4147 states and 5817 transitions. Word has length 33 [2018-09-30 20:09:03,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:09:03,218 INFO L480 AbstractCegarLoop]: Abstraction has 4147 states and 5817 transitions. [2018-09-30 20:09:03,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 20:09:03,219 INFO L276 IsEmpty]: Start isEmpty. Operand 4147 states and 5817 transitions. [2018-09-30 20:09:03,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 20:09:03,222 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:09:03,222 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:09:03,222 INFO L423 AbstractCegarLoop]: === Iteration 45 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:09:03,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:09:03,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1810158453, now seen corresponding path program 2 times [2018-09-30 20:09:03,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:09:03,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:09:03,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:03,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:09:03,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:03,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:03,397 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:03,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:09:03,398 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 20:09:03,409 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:09:03,463 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:09:03,463 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:09:03,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:09:03,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:03,620 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:09:03,620 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2018-09-30 20:09:03,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:09:03,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:09:03,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:09:03,621 INFO L87 Difference]: Start difference. First operand 4147 states and 5817 transitions. Second operand 18 states. [2018-09-30 20:09:09,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:09:09,096 INFO L93 Difference]: Finished difference Result 5255 states and 7327 transitions. [2018-09-30 20:09:09,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 20:09:09,096 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2018-09-30 20:09:09,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:09:09,105 INFO L225 Difference]: With dead ends: 5255 [2018-09-30 20:09:09,106 INFO L226 Difference]: Without dead ends: 5253 [2018-09-30 20:09:09,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=346, Invalid=1460, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 20:09:09,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5253 states. [2018-09-30 20:09:11,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5253 to 4447. [2018-09-30 20:09:11,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4447 states. [2018-09-30 20:09:11,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4447 states to 4447 states and 6228 transitions. [2018-09-30 20:09:11,090 INFO L78 Accepts]: Start accepts. Automaton has 4447 states and 6228 transitions. Word has length 33 [2018-09-30 20:09:11,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:09:11,090 INFO L480 AbstractCegarLoop]: Abstraction has 4447 states and 6228 transitions. [2018-09-30 20:09:11,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:09:11,090 INFO L276 IsEmpty]: Start isEmpty. Operand 4447 states and 6228 transitions. [2018-09-30 20:09:11,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 20:09:11,093 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:09:11,093 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:09:11,094 INFO L423 AbstractCegarLoop]: === Iteration 46 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:09:11,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:09:11,094 INFO L82 PathProgramCache]: Analyzing trace with hash -667748710, now seen corresponding path program 1 times [2018-09-30 20:09:11,094 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:09:11,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:09:11,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:11,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:09:11,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:11,347 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 20:09:11,348 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:09:11,348 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:09:11,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:09:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:11,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:09:11,559 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 20:09:11,579 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:09:11,580 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2018-09-30 20:09:11,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:09:11,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:09:11,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:09:11,580 INFO L87 Difference]: Start difference. First operand 4447 states and 6228 transitions. Second operand 18 states. [2018-09-30 20:09:21,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:09:21,697 INFO L93 Difference]: Finished difference Result 7721 states and 10805 transitions. [2018-09-30 20:09:21,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 20:09:21,697 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2018-09-30 20:09:21,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:09:21,708 INFO L225 Difference]: With dead ends: 7721 [2018-09-30 20:09:21,709 INFO L226 Difference]: Without dead ends: 7719 [2018-09-30 20:09:21,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3331 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1278, Invalid=8228, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 20:09:21,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7719 states. [2018-09-30 20:09:24,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7719 to 5438. [2018-09-30 20:09:24,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5438 states. [2018-09-30 20:09:24,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5438 states to 5438 states and 7651 transitions. [2018-09-30 20:09:24,269 INFO L78 Accepts]: Start accepts. Automaton has 5438 states and 7651 transitions. Word has length 33 [2018-09-30 20:09:24,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:09:24,270 INFO L480 AbstractCegarLoop]: Abstraction has 5438 states and 7651 transitions. [2018-09-30 20:09:24,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:09:24,270 INFO L276 IsEmpty]: Start isEmpty. Operand 5438 states and 7651 transitions. [2018-09-30 20:09:24,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 20:09:24,273 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:09:24,273 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:09:24,274 INFO L423 AbstractCegarLoop]: === Iteration 47 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:09:24,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:09:24,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1146614399, now seen corresponding path program 2 times [2018-09-30 20:09:24,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:09:24,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:09:24,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:24,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:09:24,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:24,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:24,365 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-30 20:09:24,366 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:09:24,366 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 20:09:24,373 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:09:24,427 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:09:24,427 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:09:24,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:09:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 20:09:24,536 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:09:24,536 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2018-09-30 20:09:24,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:09:24,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:09:24,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:09:24,537 INFO L87 Difference]: Start difference. First operand 5438 states and 7651 transitions. Second operand 16 states. [2018-09-30 20:09:28,307 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-09-30 20:09:28,743 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-09-30 20:09:34,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:09:34,224 INFO L93 Difference]: Finished difference Result 15976 states and 22278 transitions. [2018-09-30 20:09:34,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-30 20:09:34,225 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2018-09-30 20:09:34,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:09:34,239 INFO L225 Difference]: With dead ends: 15976 [2018-09-30 20:09:34,239 INFO L226 Difference]: Without dead ends: 10483 [2018-09-30 20:09:34,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6466 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2880, Invalid=14150, Unknown=0, NotChecked=0, Total=17030 [2018-09-30 20:09:34,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10483 states. [2018-09-30 20:09:38,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10483 to 8111. [2018-09-30 20:09:38,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8111 states. [2018-09-30 20:09:38,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8111 states to 8111 states and 11260 transitions. [2018-09-30 20:09:38,280 INFO L78 Accepts]: Start accepts. Automaton has 8111 states and 11260 transitions. Word has length 33 [2018-09-30 20:09:38,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:09:38,280 INFO L480 AbstractCegarLoop]: Abstraction has 8111 states and 11260 transitions. [2018-09-30 20:09:38,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:09:38,281 INFO L276 IsEmpty]: Start isEmpty. Operand 8111 states and 11260 transitions. [2018-09-30 20:09:38,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 20:09:38,285 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:09:38,285 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:09:38,285 INFO L423 AbstractCegarLoop]: === Iteration 48 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:09:38,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:09:38,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1449531796, now seen corresponding path program 1 times [2018-09-30 20:09:38,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:09:38,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:09:38,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:38,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:09:38,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:38,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:38,411 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 20:09:38,411 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:09:38,411 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 20:09:38,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:09:38,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:38,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:09:38,592 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 20:09:38,612 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:09:38,612 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2018-09-30 20:09:38,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 20:09:38,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 20:09:38,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:09:38,613 INFO L87 Difference]: Start difference. First operand 8111 states and 11260 transitions. Second operand 19 states. [2018-09-30 20:09:47,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:09:47,560 INFO L93 Difference]: Finished difference Result 10277 states and 14246 transitions. [2018-09-30 20:09:47,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 20:09:47,560 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2018-09-30 20:09:47,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:09:47,574 INFO L225 Difference]: With dead ends: 10277 [2018-09-30 20:09:47,574 INFO L226 Difference]: Without dead ends: 10275 [2018-09-30 20:09:47,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=978, Invalid=4424, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 20:09:47,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10275 states. [2018-09-30 20:09:51,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10275 to 8291. [2018-09-30 20:09:51,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8291 states. [2018-09-30 20:09:51,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8291 states to 8291 states and 11531 transitions. [2018-09-30 20:09:51,935 INFO L78 Accepts]: Start accepts. Automaton has 8291 states and 11531 transitions. Word has length 33 [2018-09-30 20:09:51,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:09:51,936 INFO L480 AbstractCegarLoop]: Abstraction has 8291 states and 11531 transitions. [2018-09-30 20:09:51,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 20:09:51,936 INFO L276 IsEmpty]: Start isEmpty. Operand 8291 states and 11531 transitions. [2018-09-30 20:09:51,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 20:09:51,941 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:09:51,941 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:09:51,941 INFO L423 AbstractCegarLoop]: === Iteration 49 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:09:51,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:09:51,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1026480992, now seen corresponding path program 1 times [2018-09-30 20:09:51,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:09:51,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:09:51,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:51,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:09:51,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:51,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 20:09:52,473 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:09:52,473 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 20:09:52,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:09:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:52,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:09:52,627 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 20:09:52,648 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:09:52,648 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2018-09-30 20:09:52,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 20:09:52,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 20:09:52,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:09:52,649 INFO L87 Difference]: Start difference. First operand 8291 states and 11531 transitions. Second operand 19 states. [2018-09-30 20:09:55,215 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2018-09-30 20:10:03,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:03,121 INFO L93 Difference]: Finished difference Result 16294 states and 22694 transitions. [2018-09-30 20:10:03,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 20:10:03,122 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2018-09-30 20:10:03,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:03,135 INFO L225 Difference]: With dead ends: 16294 [2018-09-30 20:10:03,135 INFO L226 Difference]: Without dead ends: 9999 [2018-09-30 20:10:03,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4530 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2859, Invalid=11183, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 20:10:03,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9999 states. [2018-09-30 20:10:07,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9999 to 8241. [2018-09-30 20:10:07,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8241 states. [2018-09-30 20:10:07,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8241 states to 8241 states and 11466 transitions. [2018-09-30 20:10:07,424 INFO L78 Accepts]: Start accepts. Automaton has 8241 states and 11466 transitions. Word has length 33 [2018-09-30 20:10:07,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:07,424 INFO L480 AbstractCegarLoop]: Abstraction has 8241 states and 11466 transitions. [2018-09-30 20:10:07,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 20:10:07,424 INFO L276 IsEmpty]: Start isEmpty. Operand 8241 states and 11466 transitions. [2018-09-30 20:10:07,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 20:10:07,429 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:07,429 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:10:07,429 INFO L423 AbstractCegarLoop]: === Iteration 50 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:07,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:07,430 INFO L82 PathProgramCache]: Analyzing trace with hash 610357864, now seen corresponding path program 3 times [2018-09-30 20:10:07,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:07,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:07,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:07,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:07,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:07,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:07,782 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:07,782 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:07,782 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 20:10:07,789 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:10:07,843 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 20:10:07,843 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:07,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:07,944 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 20:10:07,964 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:07,965 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 21 [2018-09-30 20:10:07,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 20:10:07,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 20:10:07,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2018-09-30 20:10:07,965 INFO L87 Difference]: Start difference. First operand 8241 states and 11466 transitions. Second operand 21 states. [2018-09-30 20:10:18,076 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2018-09-30 20:10:28,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:28,153 INFO L93 Difference]: Finished difference Result 25684 states and 35500 transitions. [2018-09-30 20:10:28,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2018-09-30 20:10:28,154 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 33 [2018-09-30 20:10:28,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:28,176 INFO L225 Difference]: With dead ends: 25684 [2018-09-30 20:10:28,177 INFO L226 Difference]: Without dead ends: 16698 [2018-09-30 20:10:28,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18096 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=6678, Invalid=35142, Unknown=0, NotChecked=0, Total=41820 [2018-09-30 20:10:28,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16698 states. [2018-09-30 20:10:33,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16698 to 10011. [2018-09-30 20:10:33,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10011 states. [2018-09-30 20:10:33,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10011 states to 10011 states and 13930 transitions. [2018-09-30 20:10:33,601 INFO L78 Accepts]: Start accepts. Automaton has 10011 states and 13930 transitions. Word has length 33 [2018-09-30 20:10:33,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:33,601 INFO L480 AbstractCegarLoop]: Abstraction has 10011 states and 13930 transitions. [2018-09-30 20:10:33,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 20:10:33,601 INFO L276 IsEmpty]: Start isEmpty. Operand 10011 states and 13930 transitions. [2018-09-30 20:10:33,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 20:10:33,606 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:33,606 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:10:33,606 INFO L423 AbstractCegarLoop]: === Iteration 51 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:33,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:33,606 INFO L82 PathProgramCache]: Analyzing trace with hash 690693469, now seen corresponding path program 1 times [2018-09-30 20:10:33,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:33,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:33,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:33,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:33,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:33,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:33,817 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:33,817 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:33,817 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 20:10:33,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:33,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:34,030 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 20:10:34,144 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:34,144 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2018-09-30 20:10:34,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 20:10:34,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 20:10:34,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2018-09-30 20:10:34,145 INFO L87 Difference]: Start difference. First operand 10011 states and 13930 transitions. Second operand 21 states. [2018-09-30 20:10:46,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:46,409 INFO L93 Difference]: Finished difference Result 12668 states and 17557 transitions. [2018-09-30 20:10:46,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 20:10:46,410 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 33 [2018-09-30 20:10:46,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:46,427 INFO L225 Difference]: With dead ends: 12668 [2018-09-30 20:10:46,427 INFO L226 Difference]: Without dead ends: 12586 [2018-09-30 20:10:46,431 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2220 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=841, Invalid=6131, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 20:10:46,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12586 states. Received shutdown request... [2018-09-30 20:10:51,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12586 to 10468. [2018-09-30 20:10:51,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10468 states. [2018-09-30 20:10:51,789 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 20:10:51,795 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 20:10:51,795 INFO L202 PluginConnector]: Adding new model threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 08:10:51 BoogieIcfgContainer [2018-09-30 20:10:51,795 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 20:10:51,796 INFO L168 Benchmark]: Toolchain (without parser) took 253997.01 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -257.4 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-09-30 20:10:51,797 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.29 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:10:51,797 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.38 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:10:51,797 INFO L168 Benchmark]: Boogie Preprocessor took 35.41 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:10:51,798 INFO L168 Benchmark]: RCFGBuilder took 734.29 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:10:51,798 INFO L168 Benchmark]: TraceAbstraction took 253174.07 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -278.6 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-09-30 20:10:51,801 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 0.29 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.38 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 35.41 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 734.29 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 253174.07 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -278.6 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 66). Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 99). Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 121]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 121). Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 112]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 112). Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 48 locations, 4 error locations. TIMEOUT Result, 253.1s OverallTime, 51 OverallIterations, 4 TraceHistogramMax, 186.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3758 SDtfs, 10438 SDslu, 7427 SDs, 0 SdLazy, 52271 SolverSat, 14023 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 53.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3857 GetRequests, 1041 SyntacticMatches, 11 SemanticMatches, 2805 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 85743 ImplicationChecksByTransitivity, 73.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10011occurred in iteration=50, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 43.4s AutomataMinimizationTime, 51 MinimizatonAttempts, 32101 StatesRemovedByMinimization, 50 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 18.9s InterpolantComputationTime, 2108 NumberOfCodeBlocks, 2108 NumberOfCodeBlocksAsserted, 108 NumberOfCheckSat, 2009 ConstructedInterpolants, 32 QuantifiedInterpolants, 222893 SizeOfPredicates, 797 NumberOfNonLiveVariables, 14213 ConjunctsInSsa, 1503 ConjunctsInUnsatCore, 99 InterpolantComputations, 9 PerfectInterpolantSequences, 199/778 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/threadpooling_product_WithProcedures.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_20-10-51-812.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/threadpooling_product_WithProcedures.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_20-10-51-812.csv Completed graceful shutdown