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 0.1.23-00a8621 [2018-09-30 10:15:02,466 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 10:15:02,468 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 10:15:02,487 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 10:15:02,487 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 10:15:02,489 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 10:15:02,490 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 10:15:02,493 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 10:15:02,495 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 10:15:02,498 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 10:15:02,500 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 10:15:02,501 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 10:15:02,502 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 10:15:02,503 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 10:15:02,506 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 10:15:02,513 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 10:15:02,514 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 10:15:02,518 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 10:15:02,522 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 10:15:02,523 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 10:15:02,524 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 10:15:02,527 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 10:15:02,533 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-30 10:15:02,533 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-30 10:15:02,534 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-30 10:15:02,535 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-30 10:15:02,536 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-30 10:15:02,537 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-30 10:15:02,540 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-30 10:15:02,542 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-30 10:15:02,542 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-30 10:15:02,544 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-09-30 10:15:02,548 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 10:15:02,574 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 10:15:02,575 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 10:15:02,576 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 10:15:02,577 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 10:15:02,577 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 10:15:02,578 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 10:15:02,578 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 10:15:02,578 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 10:15:02,579 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 10:15:02,579 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 10:15:02,580 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 10:15:02,580 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 10:15:02,580 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 10:15:02,580 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 10:15:02,580 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 10:15:02,581 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 10:15:02,581 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 10:15:02,581 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 10:15:02,581 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 10:15:02,581 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 10:15:02,582 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 10:15:02,582 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 10:15:02,582 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:15:02,582 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 10:15:02,583 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 10:15:02,583 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 10:15:02,583 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 10:15:02,585 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 10:15:02,585 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 10:15:02,585 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 10:15:02,656 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 10:15:02,672 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 10:15:02,679 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 10:15:02,680 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 10:15:02,681 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 10:15:02,682 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/threadpooling_product_WithProcedures.bpl [2018-09-30 10:15:02,682 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/threadpooling_product_WithProcedures.bpl' [2018-09-30 10:15:02,746 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 10:15:02,749 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 10:15:02,750 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 10:15:02,750 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 10:15:02,751 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 10:15:02,770 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 10:15:02" (1/1) ... [2018-09-30 10:15:02,781 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 10:15:02" (1/1) ... [2018-09-30 10:15:02,789 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 10:15:02,790 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 10:15:02,790 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 10:15:02,791 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 10:15:02,801 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 10:15:02" (1/1) ... [2018-09-30 10:15:02,802 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 10:15:02" (1/1) ... [2018-09-30 10:15:02,803 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 10:15:02" (1/1) ... [2018-09-30 10:15:02,803 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 10:15:02" (1/1) ... [2018-09-30 10:15:02,808 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 10:15:02" (1/1) ... [2018-09-30 10:15:02,811 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 10:15:02" (1/1) ... [2018-09-30 10:15:02,812 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 10:15:02" (1/1) ... [2018-09-30 10:15:02,814 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 10:15:02,814 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 10:15:02,815 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 10:15:02,815 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 10:15:02,816 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 10:15:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:15:02,892 INFO L130 BoogieDeclarations]: Found specification of procedure l1l0 [2018-09-30 10:15:02,893 INFO L138 BoogieDeclarations]: Found implementation of procedure l1l0 [2018-09-30 10:15:02,893 INFO L130 BoogieDeclarations]: Found specification of procedure l0l1 [2018-09-30 10:15:02,893 INFO L138 BoogieDeclarations]: Found implementation of procedure l0l1 [2018-09-30 10:15:02,893 INFO L130 BoogieDeclarations]: Found specification of procedure l0l0 [2018-09-30 10:15:02,894 INFO L138 BoogieDeclarations]: Found implementation of procedure l0l0 [2018-09-30 10:15:02,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 10:15:02,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 10:15:02,894 INFO L130 BoogieDeclarations]: Found specification of procedure l1l1 [2018-09-30 10:15:02,894 INFO L138 BoogieDeclarations]: Found implementation of procedure l1l1 [2018-09-30 10:15:03,406 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 10:15:03,406 INFO L202 PluginConnector]: Adding new model threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:15:03 BoogieIcfgContainer [2018-09-30 10:15:03,407 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 10:15:03,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 10:15:03,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 10:15:03,411 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 10:15:03,411 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 10:15:02" (1/2) ... [2018-09-30 10:15:03,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a43db1b and model type threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 10:15:03, skipping insertion in model container [2018-09-30 10:15:03,413 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 10:15:03" (2/2) ... [2018-09-30 10:15:03,415 INFO L112 eAbstractionObserver]: Analyzing ICFG threadpooling_product_WithProcedures.bpl [2018-09-30 10:15:03,426 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 10:15:03,438 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-09-30 10:15:03,488 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 10:15:03,489 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 10:15:03,489 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 10:15:03,489 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 10:15:03,489 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 10:15:03,489 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 10:15:03,490 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 10:15:03,490 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 10:15:03,490 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 10:15:03,510 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2018-09-30 10:15:03,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 10:15:03,517 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:03,518 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:03,519 INFO L423 AbstractCegarLoop]: === Iteration 1 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:03,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:03,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1282157605, now seen corresponding path program 1 times [2018-09-30 10:15:03,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:03,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:03,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:03,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:03,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:03,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:03,776 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:15:03,777 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-30 10:15:03,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:15:03,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:15:03,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:15:03,796 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 6 states. [2018-09-30 10:15:04,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:04,592 INFO L93 Difference]: Finished difference Result 72 states and 100 transitions. [2018-09-30 10:15:04,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:15:04,594 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2018-09-30 10:15:04,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:04,607 INFO L225 Difference]: With dead ends: 72 [2018-09-30 10:15:04,607 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 10:15:04,611 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 10:15:04,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 10:15:04,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 48. [2018-09-30 10:15:04,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 10:15:04,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2018-09-30 10:15:04,659 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 7 [2018-09-30 10:15:04,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:04,660 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2018-09-30 10:15:04,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:15:04,661 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2018-09-30 10:15:04,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 10:15:04,662 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:04,662 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:04,663 INFO L423 AbstractCegarLoop]: === Iteration 2 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:04,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:04,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1272619553, now seen corresponding path program 1 times [2018-09-30 10:15:04,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:04,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:04,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:04,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:04,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:04,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:04,798 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:15:04,798 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-30 10:15:04,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:15:04,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:15:04,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:15:04,801 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 6 states. [2018-09-30 10:15:05,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:05,552 INFO L93 Difference]: Finished difference Result 81 states and 113 transitions. [2018-09-30 10:15:05,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:15:05,553 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2018-09-30 10:15:05,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:05,556 INFO L225 Difference]: With dead ends: 81 [2018-09-30 10:15:05,556 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 10:15:05,557 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 10:15:05,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 10:15:05,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 57. [2018-09-30 10:15:05,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 10:15:05,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 78 transitions. [2018-09-30 10:15:05,571 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 78 transitions. Word has length 7 [2018-09-30 10:15:05,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:05,572 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 78 transitions. [2018-09-30 10:15:05,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:15:05,572 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 78 transitions. [2018-09-30 10:15:05,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:15:05,574 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:05,574 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:05,574 INFO L423 AbstractCegarLoop]: === Iteration 3 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:05,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:05,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1601446133, now seen corresponding path program 1 times [2018-09-30 10:15:05,575 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:05,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:05,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:05,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:05,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:05,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:05,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:05,730 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:15:05,731 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-30 10:15:05,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:15:05,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:15:05,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:15:05,732 INFO L87 Difference]: Start difference. First operand 57 states and 78 transitions. Second operand 7 states. [2018-09-30 10:15:06,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:06,520 INFO L93 Difference]: Finished difference Result 122 states and 175 transitions. [2018-09-30 10:15:06,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:15:06,524 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-09-30 10:15:06,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:06,526 INFO L225 Difference]: With dead ends: 122 [2018-09-30 10:15:06,526 INFO L226 Difference]: Without dead ends: 120 [2018-09-30 10:15:06,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:15:06,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-30 10:15:06,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 73. [2018-09-30 10:15:06,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 10:15:06,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 103 transitions. [2018-09-30 10:15:06,543 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 103 transitions. Word has length 10 [2018-09-30 10:15:06,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:06,544 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 103 transitions. [2018-09-30 10:15:06,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:15:06,544 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 103 transitions. [2018-09-30 10:15:06,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:15:06,546 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:06,546 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:06,546 INFO L423 AbstractCegarLoop]: === Iteration 4 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:06,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:06,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1152651256, now seen corresponding path program 1 times [2018-09-30 10:15:06,547 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:06,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:06,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:06,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:06,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:06,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:06,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:06,663 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:06,663 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:06,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:06,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:06,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:06,879 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:15:06,879 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2018-09-30 10:15:06,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:15:06,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:15:06,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:15:06,880 INFO L87 Difference]: Start difference. First operand 73 states and 103 transitions. Second operand 9 states. [2018-09-30 10:15:07,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:07,762 INFO L93 Difference]: Finished difference Result 168 states and 243 transitions. [2018-09-30 10:15:07,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 10:15:07,763 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2018-09-30 10:15:07,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:07,765 INFO L225 Difference]: With dead ends: 168 [2018-09-30 10:15:07,765 INFO L226 Difference]: Without dead ends: 121 [2018-09-30 10:15:07,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:15:07,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-30 10:15:07,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 97. [2018-09-30 10:15:07,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 10:15:07,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 136 transitions. [2018-09-30 10:15:07,788 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 136 transitions. Word has length 10 [2018-09-30 10:15:07,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:07,788 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 136 transitions. [2018-09-30 10:15:07,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:15:07,789 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 136 transitions. [2018-09-30 10:15:07,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:15:07,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:07,790 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:07,791 INFO L423 AbstractCegarLoop]: === Iteration 5 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:07,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:07,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1536370777, now seen corresponding path program 1 times [2018-09-30 10:15:07,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:07,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:07,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:07,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:07,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:07,877 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:07,878 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:07,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:07,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:08,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:08,152 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:08,152 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-30 10:15:08,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:15:08,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:15:08,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:15:08,154 INFO L87 Difference]: Start difference. First operand 97 states and 136 transitions. Second operand 10 states. [2018-09-30 10:15:08,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:08,919 INFO L93 Difference]: Finished difference Result 164 states and 232 transitions. [2018-09-30 10:15:08,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:15:08,923 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2018-09-30 10:15:08,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:08,925 INFO L225 Difference]: With dead ends: 164 [2018-09-30 10:15:08,925 INFO L226 Difference]: Without dead ends: 162 [2018-09-30 10:15:08,926 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 10:15:08,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-30 10:15:08,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 109. [2018-09-30 10:15:08,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 10:15:08,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 154 transitions. [2018-09-30 10:15:08,962 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 154 transitions. Word has length 11 [2018-09-30 10:15:08,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:08,963 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 154 transitions. [2018-09-30 10:15:08,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:15:08,963 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 154 transitions. [2018-09-30 10:15:08,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:15:08,965 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:08,965 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:08,965 INFO L423 AbstractCegarLoop]: === Iteration 6 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:08,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:08,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1150793287, now seen corresponding path program 1 times [2018-09-30 10:15:08,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:08,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:08,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:08,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:08,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:09,063 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:09,063 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:09,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:09,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:09,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:09,231 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:09,232 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-30 10:15:09,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:15:09,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:15:09,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:15:09,233 INFO L87 Difference]: Start difference. First operand 109 states and 154 transitions. Second operand 10 states. [2018-09-30 10:15:09,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:09,828 INFO L93 Difference]: Finished difference Result 181 states and 254 transitions. [2018-09-30 10:15:09,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:15:09,830 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2018-09-30 10:15:09,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:09,832 INFO L225 Difference]: With dead ends: 181 [2018-09-30 10:15:09,832 INFO L226 Difference]: Without dead ends: 179 [2018-09-30 10:15:09,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:15:09,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-30 10:15:09,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 117. [2018-09-30 10:15:09,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 10:15:09,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 164 transitions. [2018-09-30 10:15:09,858 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 164 transitions. Word has length 11 [2018-09-30 10:15:09,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:09,858 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 164 transitions. [2018-09-30 10:15:09,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:15:09,858 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 164 transitions. [2018-09-30 10:15:09,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:15:09,860 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:09,861 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:09,861 INFO L423 AbstractCegarLoop]: === Iteration 7 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:09,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:09,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1829652612, now seen corresponding path program 1 times [2018-09-30 10:15:09,862 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:09,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:09,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:09,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:09,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:09,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:09,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:09,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:09,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:09,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:10,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:10,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:10,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:10,195 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:15:10,195 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2018-09-30 10:15:10,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:15:10,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:15:10,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:15:10,197 INFO L87 Difference]: Start difference. First operand 117 states and 164 transitions. Second operand 9 states. [2018-09-30 10:15:10,997 WARN L178 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2018-09-30 10:15:11,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:11,688 INFO L93 Difference]: Finished difference Result 217 states and 304 transitions. [2018-09-30 10:15:11,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 10:15:11,690 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2018-09-30 10:15:11,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:11,691 INFO L225 Difference]: With dead ends: 217 [2018-09-30 10:15:11,691 INFO L226 Difference]: Without dead ends: 133 [2018-09-30 10:15:11,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=172, Invalid=380, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:15:11,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-30 10:15:11,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 119. [2018-09-30 10:15:11,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 10:15:11,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 160 transitions. [2018-09-30 10:15:11,716 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 160 transitions. Word has length 13 [2018-09-30 10:15:11,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:11,717 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 160 transitions. [2018-09-30 10:15:11,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:15:11,717 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 160 transitions. [2018-09-30 10:15:11,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 10:15:11,718 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:11,718 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:11,719 INFO L423 AbstractCegarLoop]: === Iteration 8 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:11,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:11,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1433054771, now seen corresponding path program 1 times [2018-09-30 10:15:11,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:11,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:11,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:11,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:11,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:11,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:11,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:11,914 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:11,914 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:11,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:11,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:11,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:12,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:12,253 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:12,254 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2018-09-30 10:15:12,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:15:12,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:15:12,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:15:12,254 INFO L87 Difference]: Start difference. First operand 119 states and 160 transitions. Second operand 13 states. [2018-09-30 10:15:13,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:13,914 INFO L93 Difference]: Finished difference Result 194 states and 266 transitions. [2018-09-30 10:15:13,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 10:15:13,915 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2018-09-30 10:15:13,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:13,917 INFO L225 Difference]: With dead ends: 194 [2018-09-30 10:15:13,917 INFO L226 Difference]: Without dead ends: 192 [2018-09-30 10:15:13,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:15:13,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-09-30 10:15:13,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 181. [2018-09-30 10:15:13,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-30 10:15:13,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 257 transitions. [2018-09-30 10:15:13,964 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 257 transitions. Word has length 14 [2018-09-30 10:15:13,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:13,964 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 257 transitions. [2018-09-30 10:15:13,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:15:13,965 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 257 transitions. [2018-09-30 10:15:13,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 10:15:13,966 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:13,966 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:13,966 INFO L423 AbstractCegarLoop]: === Iteration 9 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:13,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:13,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1436992942, now seen corresponding path program 1 times [2018-09-30 10:15:13,967 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:13,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:13,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:13,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:13,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:14,066 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 10:15:14,067 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:14,067 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:14,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:14,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:14,442 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:14,443 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2018-09-30 10:15:14,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:15:14,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:15:14,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:15:14,444 INFO L87 Difference]: Start difference. First operand 181 states and 257 transitions. Second operand 14 states. [2018-09-30 10:15:15,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:15,890 INFO L93 Difference]: Finished difference Result 246 states and 347 transitions. [2018-09-30 10:15:15,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 10:15:15,893 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-30 10:15:15,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:15,897 INFO L225 Difference]: With dead ends: 246 [2018-09-30 10:15:15,897 INFO L226 Difference]: Without dead ends: 244 [2018-09-30 10:15:15,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2018-09-30 10:15:15,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-09-30 10:15:15,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 193. [2018-09-30 10:15:15,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-30 10:15:15,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 274 transitions. [2018-09-30 10:15:15,927 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 274 transitions. Word has length 14 [2018-09-30 10:15:15,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:15,927 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 274 transitions. [2018-09-30 10:15:15,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:15:15,927 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 274 transitions. [2018-09-30 10:15:15,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 10:15:15,928 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:15,929 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:15,929 INFO L423 AbstractCegarLoop]: === Iteration 10 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:15,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:15,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1436993326, now seen corresponding path program 1 times [2018-09-30 10:15:15,930 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:15,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:15,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:15,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:15,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:16,027 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:16,027 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:16,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:16,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:16,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:16,258 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:16,258 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2018-09-30 10:15:16,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:15:16,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:15:16,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:15:16,259 INFO L87 Difference]: Start difference. First operand 193 states and 274 transitions. Second operand 14 states. [2018-09-30 10:15:18,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:18,368 INFO L93 Difference]: Finished difference Result 288 states and 406 transitions. [2018-09-30 10:15:18,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 10:15:18,369 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-30 10:15:18,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:18,371 INFO L225 Difference]: With dead ends: 288 [2018-09-30 10:15:18,372 INFO L226 Difference]: Without dead ends: 286 [2018-09-30 10:15:18,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=338, Invalid=1068, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:15:18,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2018-09-30 10:15:18,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 221. [2018-09-30 10:15:18,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-30 10:15:18,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 315 transitions. [2018-09-30 10:15:18,412 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 315 transitions. Word has length 14 [2018-09-30 10:15:18,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:18,412 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 315 transitions. [2018-09-30 10:15:18,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:15:18,413 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 315 transitions. [2018-09-30 10:15:18,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 10:15:18,413 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:18,414 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:18,414 INFO L423 AbstractCegarLoop]: === Iteration 11 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:18,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:18,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1791986342, now seen corresponding path program 1 times [2018-09-30 10:15:18,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:18,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:18,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:18,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:18,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:18,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:18,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:18,545 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:18,545 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:18,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:18,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:18,768 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:18,769 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2018-09-30 10:15:18,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:15:18,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:15:18,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:15:18,770 INFO L87 Difference]: Start difference. First operand 221 states and 315 transitions. Second operand 14 states. [2018-09-30 10:15:19,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:19,773 INFO L93 Difference]: Finished difference Result 314 states and 443 transitions. [2018-09-30 10:15:19,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 10:15:19,778 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-30 10:15:19,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:19,780 INFO L225 Difference]: With dead ends: 314 [2018-09-30 10:15:19,780 INFO L226 Difference]: Without dead ends: 312 [2018-09-30 10:15:19,780 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 10:15:19,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2018-09-30 10:15:19,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 243. [2018-09-30 10:15:19,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-09-30 10:15:19,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 349 transitions. [2018-09-30 10:15:19,813 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 349 transitions. Word has length 14 [2018-09-30 10:15:19,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:19,814 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 349 transitions. [2018-09-30 10:15:19,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:15:19,814 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 349 transitions. [2018-09-30 10:15:19,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 10:15:19,814 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:19,815 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:19,815 INFO L423 AbstractCegarLoop]: === Iteration 12 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:19,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:19,815 INFO L82 PathProgramCache]: Analyzing trace with hash 844488035, now seen corresponding path program 1 times [2018-09-30 10:15:19,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:19,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:19,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:19,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:19,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:19,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:19,882 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:19,882 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:19,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:19,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:20,032 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:20,033 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2018-09-30 10:15:20,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:15:20,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:15:20,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:15:20,033 INFO L87 Difference]: Start difference. First operand 243 states and 349 transitions. Second operand 13 states. [2018-09-30 10:15:20,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:20,973 INFO L93 Difference]: Finished difference Result 322 states and 462 transitions. [2018-09-30 10:15:20,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 10:15:20,980 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2018-09-30 10:15:20,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:20,982 INFO L225 Difference]: With dead ends: 322 [2018-09-30 10:15:20,982 INFO L226 Difference]: Without dead ends: 320 [2018-09-30 10:15:20,983 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 10:15:20,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2018-09-30 10:15:21,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 302. [2018-09-30 10:15:21,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2018-09-30 10:15:21,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 444 transitions. [2018-09-30 10:15:21,044 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 444 transitions. Word has length 14 [2018-09-30 10:15:21,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:21,045 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 444 transitions. [2018-09-30 10:15:21,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:15:21,045 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 444 transitions. [2018-09-30 10:15:21,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 10:15:21,046 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:21,046 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:21,046 INFO L423 AbstractCegarLoop]: === Iteration 13 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:21,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:21,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1052420626, now seen corresponding path program 1 times [2018-09-30 10:15:21,047 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:21,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:21,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:21,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:21,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:21,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:21,189 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:21,189 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:21,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:21,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:21,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:21,332 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:21,332 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2018-09-30 10:15:21,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:15:21,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:15:21,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:15:21,334 INFO L87 Difference]: Start difference. First operand 302 states and 444 transitions. Second operand 14 states. [2018-09-30 10:15:22,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:22,770 INFO L93 Difference]: Finished difference Result 378 states and 544 transitions. [2018-09-30 10:15:22,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 10:15:22,770 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-30 10:15:22,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:22,773 INFO L225 Difference]: With dead ends: 378 [2018-09-30 10:15:22,774 INFO L226 Difference]: Without dead ends: 376 [2018-09-30 10:15:22,775 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 10:15:22,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2018-09-30 10:15:22,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 301. [2018-09-30 10:15:22,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2018-09-30 10:15:22,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 443 transitions. [2018-09-30 10:15:22,848 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 443 transitions. Word has length 14 [2018-09-30 10:15:22,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:22,849 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 443 transitions. [2018-09-30 10:15:22,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:15:22,849 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 443 transitions. [2018-09-30 10:15:22,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 10:15:22,850 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:22,850 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:22,850 INFO L423 AbstractCegarLoop]: === Iteration 14 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:22,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:22,851 INFO L82 PathProgramCache]: Analyzing trace with hash 697427610, now seen corresponding path program 1 times [2018-09-30 10:15:22,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:22,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:22,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:22,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:22,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:22,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:22,950 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:22,950 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:22,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:22,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:23,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:23,168 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:23,168 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 14 [2018-09-30 10:15:23,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:15:23,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:15:23,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:15:23,169 INFO L87 Difference]: Start difference. First operand 301 states and 443 transitions. Second operand 15 states. [2018-09-30 10:15:24,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:24,833 INFO L93 Difference]: Finished difference Result 395 states and 572 transitions. [2018-09-30 10:15:24,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 10:15:24,834 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-09-30 10:15:24,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:24,836 INFO L225 Difference]: With dead ends: 395 [2018-09-30 10:15:24,836 INFO L226 Difference]: Without dead ends: 393 [2018-09-30 10:15:24,837 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 10:15:24,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2018-09-30 10:15:24,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 312. [2018-09-30 10:15:24,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2018-09-30 10:15:24,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 459 transitions. [2018-09-30 10:15:24,895 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 459 transitions. Word has length 14 [2018-09-30 10:15:24,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:24,895 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 459 transitions. [2018-09-30 10:15:24,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:15:24,896 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 459 transitions. [2018-09-30 10:15:24,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 10:15:24,896 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:24,897 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:24,897 INFO L423 AbstractCegarLoop]: === Iteration 15 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:24,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:24,897 INFO L82 PathProgramCache]: Analyzing trace with hash 697427226, now seen corresponding path program 1 times [2018-09-30 10:15:24,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:24,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:24,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:24,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:24,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:24,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:24,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:24,977 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:24,977 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:24,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:25,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:25,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:25,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:25,235 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2018-09-30 10:15:25,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:15:25,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:15:25,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:15:25,236 INFO L87 Difference]: Start difference. First operand 312 states and 459 transitions. Second operand 13 states. [2018-09-30 10:15:27,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:27,029 INFO L93 Difference]: Finished difference Result 383 states and 560 transitions. [2018-09-30 10:15:27,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 10:15:27,029 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2018-09-30 10:15:27,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:27,032 INFO L225 Difference]: With dead ends: 383 [2018-09-30 10:15:27,032 INFO L226 Difference]: Without dead ends: 381 [2018-09-30 10:15:27,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:15:27,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2018-09-30 10:15:27,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 328. [2018-09-30 10:15:27,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-09-30 10:15:27,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 482 transitions. [2018-09-30 10:15:27,088 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 482 transitions. Word has length 14 [2018-09-30 10:15:27,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:27,088 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 482 transitions. [2018-09-30 10:15:27,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:15:27,088 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 482 transitions. [2018-09-30 10:15:27,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:15:27,089 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:27,089 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:27,090 INFO L423 AbstractCegarLoop]: === Iteration 16 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:27,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:27,090 INFO L82 PathProgramCache]: Analyzing trace with hash 406900684, now seen corresponding path program 1 times [2018-09-30 10:15:27,090 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:27,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:27,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:27,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:27,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:27,251 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 10:15:27,251 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:27,251 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:27,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:27,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:27,457 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 10:15:27,478 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:27,479 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2018-09-30 10:15:27,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:15:27,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:15:27,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:15:27,480 INFO L87 Difference]: Start difference. First operand 328 states and 482 transitions. Second operand 16 states. [2018-09-30 10:15:29,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:29,125 INFO L93 Difference]: Finished difference Result 429 states and 618 transitions. [2018-09-30 10:15:29,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 10:15:29,126 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2018-09-30 10:15:29,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:29,128 INFO L225 Difference]: With dead ends: 429 [2018-09-30 10:15:29,128 INFO L226 Difference]: Without dead ends: 427 [2018-09-30 10:15:29,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=579, Invalid=1401, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 10:15:29,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2018-09-30 10:15:29,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 242. [2018-09-30 10:15:29,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-09-30 10:15:29,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 351 transitions. [2018-09-30 10:15:29,190 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 351 transitions. Word has length 17 [2018-09-30 10:15:29,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:29,191 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 351 transitions. [2018-09-30 10:15:29,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:15:29,191 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 351 transitions. [2018-09-30 10:15:29,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:15:29,192 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:29,192 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:29,193 INFO L423 AbstractCegarLoop]: === Iteration 17 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:29,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:29,193 INFO L82 PathProgramCache]: Analyzing trace with hash 2143481530, now seen corresponding path program 1 times [2018-09-30 10:15:29,193 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:29,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:29,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:29,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:29,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:29,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:30,045 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 10:15:30,045 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:30,045 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:30,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:30,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:30,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:30,221 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 10:15:30,243 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:30,243 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2018-09-30 10:15:30,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:15:30,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:15:30,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:15:30,244 INFO L87 Difference]: Start difference. First operand 242 states and 351 transitions. Second operand 16 states. [2018-09-30 10:15:31,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:31,739 INFO L93 Difference]: Finished difference Result 330 states and 466 transitions. [2018-09-30 10:15:31,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 10:15:31,740 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2018-09-30 10:15:31,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:31,742 INFO L225 Difference]: With dead ends: 330 [2018-09-30 10:15:31,742 INFO L226 Difference]: Without dead ends: 328 [2018-09-30 10:15:31,743 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 10:15:31,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2018-09-30 10:15:31,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 158. [2018-09-30 10:15:31,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-30 10:15:31,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 226 transitions. [2018-09-30 10:15:31,795 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 226 transitions. Word has length 17 [2018-09-30 10:15:31,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:31,796 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 226 transitions. [2018-09-30 10:15:31,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:15:31,796 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 226 transitions. [2018-09-30 10:15:31,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:15:31,796 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:31,796 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:31,797 INFO L423 AbstractCegarLoop]: === Iteration 18 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:31,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:31,797 INFO L82 PathProgramCache]: Analyzing trace with hash -653821292, now seen corresponding path program 1 times [2018-09-30 10:15:31,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:31,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:31,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:31,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:31,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:31,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:32,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:32,415 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:32,415 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:32,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:32,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:32,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:32,668 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:32,668 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2018-09-30 10:15:32,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 10:15:32,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 10:15:32,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:15:32,669 INFO L87 Difference]: Start difference. First operand 158 states and 226 transitions. Second operand 12 states. [2018-09-30 10:15:33,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:33,201 INFO L93 Difference]: Finished difference Result 271 states and 380 transitions. [2018-09-30 10:15:33,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 10:15:33,206 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2018-09-30 10:15:33,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:33,207 INFO L225 Difference]: With dead ends: 271 [2018-09-30 10:15:33,207 INFO L226 Difference]: Without dead ends: 269 [2018-09-30 10:15:33,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:15:33,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-09-30 10:15:33,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 180. [2018-09-30 10:15:33,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-09-30 10:15:33,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 258 transitions. [2018-09-30 10:15:33,281 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 258 transitions. Word has length 18 [2018-09-30 10:15:33,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:33,282 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 258 transitions. [2018-09-30 10:15:33,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 10:15:33,282 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 258 transitions. [2018-09-30 10:15:33,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:15:33,283 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:33,283 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:33,284 INFO L423 AbstractCegarLoop]: === Iteration 19 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:33,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:33,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1014964826, now seen corresponding path program 1 times [2018-09-30 10:15:33,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:33,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:33,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:33,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:33,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:33,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:33,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:33,611 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:33,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:33,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:33,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:33,756 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:15:33,756 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2018-09-30 10:15:33,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:15:33,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:15:33,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:15:33,757 INFO L87 Difference]: Start difference. First operand 180 states and 258 transitions. Second operand 13 states. [2018-09-30 10:15:36,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:36,436 INFO L93 Difference]: Finished difference Result 741 states and 1047 transitions. [2018-09-30 10:15:36,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 10:15:36,436 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-30 10:15:36,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:36,439 INFO L225 Difference]: With dead ends: 741 [2018-09-30 10:15:36,439 INFO L226 Difference]: Without dead ends: 564 [2018-09-30 10:15:36,442 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2559 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1290, Invalid=6192, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 10:15:36,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2018-09-30 10:15:36,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 341. [2018-09-30 10:15:36,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-09-30 10:15:36,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 486 transitions. [2018-09-30 10:15:36,576 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 486 transitions. Word has length 18 [2018-09-30 10:15:36,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:36,576 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 486 transitions. [2018-09-30 10:15:36,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:15:36,576 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 486 transitions. [2018-09-30 10:15:36,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:15:36,577 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:36,577 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:36,578 INFO L423 AbstractCegarLoop]: === Iteration 20 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:36,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:36,578 INFO L82 PathProgramCache]: Analyzing trace with hash -155045024, now seen corresponding path program 1 times [2018-09-30 10:15:36,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:36,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:36,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:36,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:36,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:36,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:36,724 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:36,724 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:36,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:36,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:36,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:36,847 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:36,848 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2018-09-30 10:15:36,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:15:36,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:15:36,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:15:36,849 INFO L87 Difference]: Start difference. First operand 341 states and 486 transitions. Second operand 13 states. [2018-09-30 10:15:38,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:38,343 INFO L93 Difference]: Finished difference Result 809 states and 1155 transitions. [2018-09-30 10:15:38,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 10:15:38,343 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-30 10:15:38,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:38,346 INFO L225 Difference]: With dead ends: 809 [2018-09-30 10:15:38,346 INFO L226 Difference]: Without dead ends: 470 [2018-09-30 10:15:38,348 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 10:15:38,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2018-09-30 10:15:38,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 368. [2018-09-30 10:15:38,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2018-09-30 10:15:38,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 523 transitions. [2018-09-30 10:15:38,506 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 523 transitions. Word has length 18 [2018-09-30 10:15:38,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:38,506 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 523 transitions. [2018-09-30 10:15:38,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:15:38,506 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 523 transitions. [2018-09-30 10:15:38,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:15:38,507 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:38,507 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:38,508 INFO L423 AbstractCegarLoop]: === Iteration 21 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:38,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:38,508 INFO L82 PathProgramCache]: Analyzing trace with hash 393788879, now seen corresponding path program 1 times [2018-09-30 10:15:38,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:38,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:38,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:38,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:38,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:38,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:38,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:38,676 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:38,677 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:38,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:38,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:38,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:38,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:38,840 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:38,840 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-30 10:15:38,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:15:38,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:15:38,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:15:38,841 INFO L87 Difference]: Start difference. First operand 368 states and 523 transitions. Second operand 13 states. [2018-09-30 10:15:40,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:40,746 INFO L93 Difference]: Finished difference Result 1106 states and 1568 transitions. [2018-09-30 10:15:40,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 10:15:40,746 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-30 10:15:40,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:40,750 INFO L225 Difference]: With dead ends: 1106 [2018-09-30 10:15:40,750 INFO L226 Difference]: Without dead ends: 724 [2018-09-30 10:15:40,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=678, Invalid=2628, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:15:40,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2018-09-30 10:15:40,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 519. [2018-09-30 10:15:40,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 519 states. [2018-09-30 10:15:40,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 739 transitions. [2018-09-30 10:15:40,976 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 739 transitions. Word has length 18 [2018-09-30 10:15:40,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:40,977 INFO L480 AbstractCegarLoop]: Abstraction has 519 states and 739 transitions. [2018-09-30 10:15:40,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:15:40,977 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 739 transitions. [2018-09-30 10:15:40,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:15:40,978 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:40,978 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:40,978 INFO L423 AbstractCegarLoop]: === Iteration 22 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:40,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:40,979 INFO L82 PathProgramCache]: Analyzing trace with hash -216264799, now seen corresponding path program 1 times [2018-09-30 10:15:40,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:40,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:40,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:40,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:40,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:40,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:41,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:41,108 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:41,108 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:41,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:41,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:41,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:41,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:41,252 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:41,253 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2018-09-30 10:15:41,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:15:41,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:15:41,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:15:41,253 INFO L87 Difference]: Start difference. First operand 519 states and 739 transitions. Second operand 11 states. [2018-09-30 10:15:42,098 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-30 10:15:42,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:42,532 INFO L93 Difference]: Finished difference Result 711 states and 1002 transitions. [2018-09-30 10:15:42,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 10:15:42,534 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2018-09-30 10:15:42,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:42,538 INFO L225 Difference]: With dead ends: 711 [2018-09-30 10:15:42,538 INFO L226 Difference]: Without dead ends: 709 [2018-09-30 10:15:42,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2018-09-30 10:15:42,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2018-09-30 10:15:42,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 498. [2018-09-30 10:15:42,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498 states. [2018-09-30 10:15:42,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 704 transitions. [2018-09-30 10:15:42,716 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 704 transitions. Word has length 18 [2018-09-30 10:15:42,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:42,717 INFO L480 AbstractCegarLoop]: Abstraction has 498 states and 704 transitions. [2018-09-30 10:15:42,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:15:42,717 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 704 transitions. [2018-09-30 10:15:42,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:15:42,718 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:42,718 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:42,718 INFO L423 AbstractCegarLoop]: === Iteration 23 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:42,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:42,719 INFO L82 PathProgramCache]: Analyzing trace with hash 983482113, now seen corresponding path program 1 times [2018-09-30 10:15:42,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:42,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:42,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:42,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:42,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:42,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:42,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:42,819 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:42,819 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:42,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:42,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:43,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:43,029 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:15:43,029 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 13 [2018-09-30 10:15:43,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:15:43,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:15:43,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:15:43,030 INFO L87 Difference]: Start difference. First operand 498 states and 704 transitions. Second operand 13 states. [2018-09-30 10:15:44,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:44,825 INFO L93 Difference]: Finished difference Result 1319 states and 1864 transitions. [2018-09-30 10:15:44,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 10:15:44,826 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-30 10:15:44,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:44,829 INFO L225 Difference]: With dead ends: 1319 [2018-09-30 10:15:44,829 INFO L226 Difference]: Without dead ends: 823 [2018-09-30 10:15:44,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=477, Invalid=1415, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:15:44,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2018-09-30 10:15:45,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 566. [2018-09-30 10:15:45,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2018-09-30 10:15:45,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 809 transitions. [2018-09-30 10:15:45,036 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 809 transitions. Word has length 18 [2018-09-30 10:15:45,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:45,036 INFO L480 AbstractCegarLoop]: Abstraction has 566 states and 809 transitions. [2018-09-30 10:15:45,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:15:45,037 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 809 transitions. [2018-09-30 10:15:45,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:15:45,037 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:45,037 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:45,038 INFO L423 AbstractCegarLoop]: === Iteration 24 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:45,038 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:45,038 INFO L82 PathProgramCache]: Analyzing trace with hash 801556786, now seen corresponding path program 1 times [2018-09-30 10:15:45,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:45,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:45,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:45,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:45,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:45,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:45,201 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:45,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:45,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:45,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:45,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:45,349 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:45,350 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2018-09-30 10:15:45,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 10:15:45,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 10:15:45,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:15:45,351 INFO L87 Difference]: Start difference. First operand 566 states and 809 transitions. Second operand 12 states. [2018-09-30 10:15:46,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:46,135 INFO L93 Difference]: Finished difference Result 766 states and 1086 transitions. [2018-09-30 10:15:46,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 10:15:46,135 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2018-09-30 10:15:46,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:46,138 INFO L225 Difference]: With dead ends: 766 [2018-09-30 10:15:46,138 INFO L226 Difference]: Without dead ends: 764 [2018-09-30 10:15:46,139 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 10:15:46,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2018-09-30 10:15:46,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 608. [2018-09-30 10:15:46,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608 states. [2018-09-30 10:15:46,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 869 transitions. [2018-09-30 10:15:46,328 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 869 transitions. Word has length 18 [2018-09-30 10:15:46,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:46,329 INFO L480 AbstractCegarLoop]: Abstraction has 608 states and 869 transitions. [2018-09-30 10:15:46,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 10:15:46,329 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 869 transitions. [2018-09-30 10:15:46,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:15:46,330 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:46,330 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:46,330 INFO L423 AbstractCegarLoop]: === Iteration 25 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:46,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:46,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1593301430, now seen corresponding path program 1 times [2018-09-30 10:15:46,331 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:46,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:46,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:46,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:46,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:46,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:46,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:46,510 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:46,511 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:46,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:46,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:46,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:46,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:46,658 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:15:46,658 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2018-09-30 10:15:46,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:15:46,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:15:46,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:15:46,659 INFO L87 Difference]: Start difference. First operand 608 states and 869 transitions. Second operand 13 states. [2018-09-30 10:15:49,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:49,461 INFO L93 Difference]: Finished difference Result 2095 states and 2968 transitions. [2018-09-30 10:15:49,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 10:15:49,461 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-30 10:15:49,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:49,466 INFO L225 Difference]: With dead ends: 2095 [2018-09-30 10:15:49,466 INFO L226 Difference]: Without dead ends: 1329 [2018-09-30 10:15:49,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2559 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1290, Invalid=6192, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 10:15:49,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2018-09-30 10:15:49,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 992. [2018-09-30 10:15:49,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2018-09-30 10:15:49,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1402 transitions. [2018-09-30 10:15:49,797 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1402 transitions. Word has length 18 [2018-09-30 10:15:49,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:49,798 INFO L480 AbstractCegarLoop]: Abstraction has 992 states and 1402 transitions. [2018-09-30 10:15:49,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:15:49,798 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1402 transitions. [2018-09-30 10:15:49,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:15:49,799 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:49,799 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:49,799 INFO L423 AbstractCegarLoop]: === Iteration 26 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:49,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:49,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1366841759, now seen corresponding path program 1 times [2018-09-30 10:15:49,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:49,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:49,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:49,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:49,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:49,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:49,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:49,879 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:49,879 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:49,886 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:49,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:49,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:50,002 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:50,002 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2018-09-30 10:15:50,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:15:50,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:15:50,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:15:50,003 INFO L87 Difference]: Start difference. First operand 992 states and 1402 transitions. Second operand 11 states. [2018-09-30 10:15:51,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:51,268 INFO L93 Difference]: Finished difference Result 1291 states and 1819 transitions. [2018-09-30 10:15:51,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 10:15:51,268 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2018-09-30 10:15:51,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:51,272 INFO L225 Difference]: With dead ends: 1291 [2018-09-30 10:15:51,272 INFO L226 Difference]: Without dead ends: 1289 [2018-09-30 10:15:51,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2018-09-30 10:15:51,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2018-09-30 10:15:51,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1028. [2018-09-30 10:15:51,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1028 states. [2018-09-30 10:15:51,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1454 transitions. [2018-09-30 10:15:51,564 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1454 transitions. Word has length 18 [2018-09-30 10:15:51,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:51,565 INFO L480 AbstractCegarLoop]: Abstraction has 1028 states and 1454 transitions. [2018-09-30 10:15:51,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:15:51,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1454 transitions. [2018-09-30 10:15:51,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:15:51,566 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:51,566 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:51,566 INFO L423 AbstractCegarLoop]: === Iteration 27 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:51,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:51,567 INFO L82 PathProgramCache]: Analyzing trace with hash -817918193, now seen corresponding path program 1 times [2018-09-30 10:15:51,567 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:51,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:51,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:51,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:51,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:51,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:51,877 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:51,877 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:51,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:51,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:51,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:51,991 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:15:51,991 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 13 [2018-09-30 10:15:51,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:15:51,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:15:51,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:15:51,992 INFO L87 Difference]: Start difference. First operand 1028 states and 1454 transitions. Second operand 13 states. [2018-09-30 10:15:53,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:53,564 INFO L93 Difference]: Finished difference Result 2222 states and 3144 transitions. [2018-09-30 10:15:53,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 10:15:53,564 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-30 10:15:53,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:53,568 INFO L225 Difference]: With dead ends: 2222 [2018-09-30 10:15:53,568 INFO L226 Difference]: Without dead ends: 1132 [2018-09-30 10:15:53,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=477, Invalid=1415, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:15:53,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2018-09-30 10:15:53,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 831. [2018-09-30 10:15:53,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 831 states. [2018-09-30 10:15:53,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1173 transitions. [2018-09-30 10:15:53,863 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1173 transitions. Word has length 18 [2018-09-30 10:15:53,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:53,863 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 1173 transitions. [2018-09-30 10:15:53,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:15:53,864 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1173 transitions. [2018-09-30 10:15:53,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:15:53,865 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:53,865 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:15:53,865 INFO L423 AbstractCegarLoop]: === Iteration 28 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:53,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:53,865 INFO L82 PathProgramCache]: Analyzing trace with hash -228224959, now seen corresponding path program 1 times [2018-09-30 10:15:53,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:53,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:53,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:53,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:53,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:53,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:54,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:54,028 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:54,028 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:54,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:54,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:54,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:54,157 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:54,157 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-30 10:15:54,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:15:54,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:15:54,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:15:54,158 INFO L87 Difference]: Start difference. First operand 831 states and 1173 transitions. Second operand 13 states. [2018-09-30 10:15:56,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:56,357 INFO L93 Difference]: Finished difference Result 1989 states and 2785 transitions. [2018-09-30 10:15:56,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 10:15:56,358 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2018-09-30 10:15:56,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:56,362 INFO L225 Difference]: With dead ends: 1989 [2018-09-30 10:15:56,362 INFO L226 Difference]: Without dead ends: 1130 [2018-09-30 10:15:56,365 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 10:15:56,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2018-09-30 10:15:56,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 806. [2018-09-30 10:15:56,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 806 states. [2018-09-30 10:15:56,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1135 transitions. [2018-09-30 10:15:56,645 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1135 transitions. Word has length 18 [2018-09-30 10:15:56,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:56,645 INFO L480 AbstractCegarLoop]: Abstraction has 806 states and 1135 transitions. [2018-09-30 10:15:56,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:15:56,645 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1135 transitions. [2018-09-30 10:15:56,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 10:15:56,646 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:56,646 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 10:15:56,647 INFO L423 AbstractCegarLoop]: === Iteration 29 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:56,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:56,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1122647006, now seen corresponding path program 1 times [2018-09-30 10:15:56,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:56,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:56,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:56,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:56,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:56,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:56,763 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:56,763 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:56,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:56,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:56,882 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:56,882 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-09-30 10:15:56,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:15:56,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:15:56,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:15:56,883 INFO L87 Difference]: Start difference. First operand 806 states and 1135 transitions. Second operand 11 states. [2018-09-30 10:15:58,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:58,172 INFO L93 Difference]: Finished difference Result 1022 states and 1428 transitions. [2018-09-30 10:15:58,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 10:15:58,173 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2018-09-30 10:15:58,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:58,178 INFO L225 Difference]: With dead ends: 1022 [2018-09-30 10:15:58,178 INFO L226 Difference]: Without dead ends: 1020 [2018-09-30 10:15:58,179 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 10:15:58,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2018-09-30 10:15:58,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 838. [2018-09-30 10:15:58,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 838 states. [2018-09-30 10:15:58,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1182 transitions. [2018-09-30 10:15:58,457 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1182 transitions. Word has length 22 [2018-09-30 10:15:58,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:58,457 INFO L480 AbstractCegarLoop]: Abstraction has 838 states and 1182 transitions. [2018-09-30 10:15:58,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:15:58,457 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1182 transitions. [2018-09-30 10:15:58,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 10:15:58,458 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:58,458 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 10:15:58,459 INFO L423 AbstractCegarLoop]: === Iteration 30 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:58,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:58,459 INFO L82 PathProgramCache]: Analyzing trace with hash 15880131, now seen corresponding path program 1 times [2018-09-30 10:15:58,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:58,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:58,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:58,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:58,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:58,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:58,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:58,599 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:58,599 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:58,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:58,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:58,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:58,715 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:58,716 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-09-30 10:15:58,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:15:58,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:15:58,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:15:58,716 INFO L87 Difference]: Start difference. First operand 838 states and 1182 transitions. Second operand 10 states. [2018-09-30 10:16:00,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:00,379 INFO L93 Difference]: Finished difference Result 1127 states and 1575 transitions. [2018-09-30 10:16:00,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 10:16:00,379 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2018-09-30 10:16:00,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:00,383 INFO L225 Difference]: With dead ends: 1127 [2018-09-30 10:16:00,383 INFO L226 Difference]: Without dead ends: 1125 [2018-09-30 10:16:00,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2018-09-30 10:16:00,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2018-09-30 10:16:00,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 852. [2018-09-30 10:16:00,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 852 states. [2018-09-30 10:16:00,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1203 transitions. [2018-09-30 10:16:00,683 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1203 transitions. Word has length 22 [2018-09-30 10:16:00,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:00,683 INFO L480 AbstractCegarLoop]: Abstraction has 852 states and 1203 transitions. [2018-09-30 10:16:00,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:16:00,683 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1203 transitions. [2018-09-30 10:16:00,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 10:16:00,685 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:00,685 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 10:16:00,685 INFO L423 AbstractCegarLoop]: === Iteration 31 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:00,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:00,685 INFO L82 PathProgramCache]: Analyzing trace with hash -510719313, now seen corresponding path program 1 times [2018-09-30 10:16:00,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:00,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:00,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:00,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:00,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:00,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:00,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:00,810 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:00,810 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:00,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:00,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:01,414 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:01,414 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-30 10:16:01,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:16:01,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:16:01,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:16:01,415 INFO L87 Difference]: Start difference. First operand 852 states and 1203 transitions. Second operand 14 states. [2018-09-30 10:16:02,344 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-30 10:16:03,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:03,937 INFO L93 Difference]: Finished difference Result 1127 states and 1578 transitions. [2018-09-30 10:16:03,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 10:16:03,937 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2018-09-30 10:16:03,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:03,942 INFO L225 Difference]: With dead ends: 1127 [2018-09-30 10:16:03,942 INFO L226 Difference]: Without dead ends: 1125 [2018-09-30 10:16:03,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=548, Invalid=1432, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 10:16:03,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2018-09-30 10:16:04,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 830. [2018-09-30 10:16:04,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 830 states. [2018-09-30 10:16:04,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1171 transitions. [2018-09-30 10:16:04,243 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1171 transitions. Word has length 22 [2018-09-30 10:16:04,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:04,243 INFO L480 AbstractCegarLoop]: Abstraction has 830 states and 1171 transitions. [2018-09-30 10:16:04,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:16:04,244 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1171 transitions. [2018-09-30 10:16:04,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 10:16:04,245 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:04,245 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 10:16:04,245 INFO L423 AbstractCegarLoop]: === Iteration 32 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:04,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:04,246 INFO L82 PathProgramCache]: Analyzing trace with hash 627807824, now seen corresponding path program 1 times [2018-09-30 10:16:04,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:04,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:04,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:04,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:04,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:04,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:04,564 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:04,564 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:04,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:04,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:04,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:04,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:04,790 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:04,791 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2018-09-30 10:16:04,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:16:04,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:16:04,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:16:04,792 INFO L87 Difference]: Start difference. First operand 830 states and 1171 transitions. Second operand 15 states. [2018-09-30 10:16:06,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:06,442 INFO L93 Difference]: Finished difference Result 1072 states and 1499 transitions. [2018-09-30 10:16:06,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 10:16:06,442 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2018-09-30 10:16:06,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:06,446 INFO L225 Difference]: With dead ends: 1072 [2018-09-30 10:16:06,446 INFO L226 Difference]: Without dead ends: 1070 [2018-09-30 10:16:06,446 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 10:16:06,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2018-09-30 10:16:06,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 788. [2018-09-30 10:16:06,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 788 states. [2018-09-30 10:16:06,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1104 transitions. [2018-09-30 10:16:06,724 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1104 transitions. Word has length 22 [2018-09-30 10:16:06,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:06,724 INFO L480 AbstractCegarLoop]: Abstraction has 788 states and 1104 transitions. [2018-09-30 10:16:06,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:16:06,724 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1104 transitions. [2018-09-30 10:16:06,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 10:16:06,726 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:06,726 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 10:16:06,726 INFO L423 AbstractCegarLoop]: === Iteration 33 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:06,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:06,726 INFO L82 PathProgramCache]: Analyzing trace with hash 345073063, now seen corresponding path program 1 times [2018-09-30 10:16:06,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:06,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:06,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:06,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:06,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:06,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:06,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:06,920 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:06,921 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:06,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:06,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:06,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:07,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:07,025 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:07,025 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-09-30 10:16:07,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:16:07,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:16:07,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:16:07,026 INFO L87 Difference]: Start difference. First operand 788 states and 1104 transitions. Second operand 10 states. [2018-09-30 10:16:08,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:08,364 INFO L93 Difference]: Finished difference Result 1025 states and 1426 transitions. [2018-09-30 10:16:08,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 10:16:08,364 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2018-09-30 10:16:08,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:08,368 INFO L225 Difference]: With dead ends: 1025 [2018-09-30 10:16:08,368 INFO L226 Difference]: Without dead ends: 1023 [2018-09-30 10:16:08,369 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 10:16:08,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2018-09-30 10:16:08,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 818. [2018-09-30 10:16:08,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 818 states. [2018-09-30 10:16:08,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1149 transitions. [2018-09-30 10:16:08,667 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1149 transitions. Word has length 22 [2018-09-30 10:16:08,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:08,667 INFO L480 AbstractCegarLoop]: Abstraction has 818 states and 1149 transitions. [2018-09-30 10:16:08,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:16:08,667 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1149 transitions. [2018-09-30 10:16:08,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 10:16:08,668 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:08,668 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 10:16:08,669 INFO L423 AbstractCegarLoop]: === Iteration 34 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:08,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:08,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1613894486, now seen corresponding path program 1 times [2018-09-30 10:16:08,669 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:08,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:08,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:08,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:08,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:08,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:08,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:08,824 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:08,825 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:08,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:08,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:08,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:08,990 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:08,990 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2018-09-30 10:16:08,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:16:08,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:16:08,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:16:08,991 INFO L87 Difference]: Start difference. First operand 818 states and 1149 transitions. Second operand 15 states. [2018-09-30 10:16:10,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:10,793 INFO L93 Difference]: Finished difference Result 1057 states and 1481 transitions. [2018-09-30 10:16:10,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 10:16:10,794 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2018-09-30 10:16:10,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:10,797 INFO L225 Difference]: With dead ends: 1057 [2018-09-30 10:16:10,797 INFO L226 Difference]: Without dead ends: 1055 [2018-09-30 10:16:10,798 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 10:16:10,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2018-09-30 10:16:11,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 770. [2018-09-30 10:16:11,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 770 states. [2018-09-30 10:16:11,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1073 transitions. [2018-09-30 10:16:11,097 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1073 transitions. Word has length 22 [2018-09-30 10:16:11,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:11,097 INFO L480 AbstractCegarLoop]: Abstraction has 770 states and 1073 transitions. [2018-09-30 10:16:11,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:16:11,097 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1073 transitions. [2018-09-30 10:16:11,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 10:16:11,098 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:11,098 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 10:16:11,099 INFO L423 AbstractCegarLoop]: === Iteration 35 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:11,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:11,099 INFO L82 PathProgramCache]: Analyzing trace with hash -488650854, now seen corresponding path program 1 times [2018-09-30 10:16:11,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:11,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:11,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:11,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:11,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:11,973 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 10:16:11,973 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:11,974 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:11,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:12,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:12,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:12,275 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 10:16:12,296 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:12,297 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-30 10:16:12,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:16:12,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:16:12,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:16:12,298 INFO L87 Difference]: Start difference. First operand 770 states and 1073 transitions. Second operand 15 states. [2018-09-30 10:16:14,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:14,879 INFO L93 Difference]: Finished difference Result 1779 states and 2438 transitions. [2018-09-30 10:16:14,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 10:16:14,879 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2018-09-30 10:16:14,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:14,884 INFO L225 Difference]: With dead ends: 1779 [2018-09-30 10:16:14,884 INFO L226 Difference]: Without dead ends: 1507 [2018-09-30 10:16:14,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1037, Invalid=3655, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 10:16:14,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2018-09-30 10:16:15,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1174. [2018-09-30 10:16:15,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1174 states. [2018-09-30 10:16:15,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1623 transitions. [2018-09-30 10:16:15,344 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1623 transitions. Word has length 25 [2018-09-30 10:16:15,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:15,344 INFO L480 AbstractCegarLoop]: Abstraction has 1174 states and 1623 transitions. [2018-09-30 10:16:15,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:16:15,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1623 transitions. [2018-09-30 10:16:15,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 10:16:15,346 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:15,346 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 10:16:15,346 INFO L423 AbstractCegarLoop]: === Iteration 36 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:15,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:15,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1608047085, now seen corresponding path program 1 times [2018-09-30 10:16:15,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:15,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:15,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:15,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:15,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:15,503 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:15,503 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:15,503 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:15,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:15,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:15,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:15,644 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 10:16:15,666 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:15,666 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-30 10:16:15,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:16:15,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:16:15,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:16:15,667 INFO L87 Difference]: Start difference. First operand 1174 states and 1623 transitions. Second operand 15 states. [2018-09-30 10:16:18,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:18,276 INFO L93 Difference]: Finished difference Result 2685 states and 3700 transitions. [2018-09-30 10:16:18,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 10:16:18,277 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2018-09-30 10:16:18,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:18,283 INFO L225 Difference]: With dead ends: 2685 [2018-09-30 10:16:18,283 INFO L226 Difference]: Without dead ends: 1652 [2018-09-30 10:16:18,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=782, Invalid=2758, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:16:18,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2018-09-30 10:16:18,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1212. [2018-09-30 10:16:18,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1212 states. [2018-09-30 10:16:18,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1681 transitions. [2018-09-30 10:16:18,765 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1681 transitions. Word has length 25 [2018-09-30 10:16:18,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:18,765 INFO L480 AbstractCegarLoop]: Abstraction has 1212 states and 1681 transitions. [2018-09-30 10:16:18,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:16:18,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1681 transitions. [2018-09-30 10:16:18,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 10:16:18,767 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:18,767 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 10:16:18,767 INFO L423 AbstractCegarLoop]: === Iteration 37 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:18,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:18,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1101622072, now seen corresponding path program 1 times [2018-09-30 10:16:18,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:18,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:18,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:18,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:18,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:18,924 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 10:16:18,925 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:18,925 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:18,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:18,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:19,038 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 10:16:19,059 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:19,059 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-30 10:16:19,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:16:19,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:16:19,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:16:19,060 INFO L87 Difference]: Start difference. First operand 1212 states and 1681 transitions. Second operand 15 states. [2018-09-30 10:16:22,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:22,016 INFO L93 Difference]: Finished difference Result 2130 states and 2907 transitions. [2018-09-30 10:16:22,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 10:16:22,017 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2018-09-30 10:16:22,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:22,024 INFO L225 Difference]: With dead ends: 2130 [2018-09-30 10:16:22,024 INFO L226 Difference]: Without dead ends: 1946 [2018-09-30 10:16:22,025 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1010, Invalid=3546, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 10:16:22,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2018-09-30 10:16:22,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1616. [2018-09-30 10:16:22,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1616 states. [2018-09-30 10:16:22,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 2248 transitions. [2018-09-30 10:16:22,641 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 2248 transitions. Word has length 25 [2018-09-30 10:16:22,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:22,641 INFO L480 AbstractCegarLoop]: Abstraction has 1616 states and 2248 transitions. [2018-09-30 10:16:22,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:16:22,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 2248 transitions. [2018-09-30 10:16:22,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 10:16:22,643 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:22,643 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 10:16:22,643 INFO L423 AbstractCegarLoop]: === Iteration 38 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:22,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:22,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1649781575, now seen corresponding path program 1 times [2018-09-30 10:16:22,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:22,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:22,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:22,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:22,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:22,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:22,751 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:22,751 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:22,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:22,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:22,869 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 10:16:22,889 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:22,890 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2018-09-30 10:16:22,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:16:22,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:16:22,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:16:22,890 INFO L87 Difference]: Start difference. First operand 1616 states and 2248 transitions. Second operand 15 states. [2018-09-30 10:16:25,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:25,846 INFO L93 Difference]: Finished difference Result 3372 states and 4705 transitions. [2018-09-30 10:16:25,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 10:16:25,847 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2018-09-30 10:16:25,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:25,856 INFO L225 Difference]: With dead ends: 3372 [2018-09-30 10:16:25,856 INFO L226 Difference]: Without dead ends: 2040 [2018-09-30 10:16:25,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=2758, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:16:25,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2018-09-30 10:16:26,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1575. [2018-09-30 10:16:26,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1575 states. [2018-09-30 10:16:26,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 2199 transitions. [2018-09-30 10:16:26,423 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 2199 transitions. Word has length 25 [2018-09-30 10:16:26,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:26,423 INFO L480 AbstractCegarLoop]: Abstraction has 1575 states and 2199 transitions. [2018-09-30 10:16:26,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:16:26,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 2199 transitions. [2018-09-30 10:16:26,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 10:16:26,425 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:26,425 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 10:16:26,425 INFO L423 AbstractCegarLoop]: === Iteration 39 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:26,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:26,426 INFO L82 PathProgramCache]: Analyzing trace with hash -664447164, now seen corresponding path program 2 times [2018-09-30 10:16:26,426 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:26,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:26,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:26,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:26,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:26,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:26,601 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 10:16:26,601 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:26,601 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:26,608 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:16:26,659 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:16:26,660 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:26,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:26,873 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 10:16:26,893 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:26,893 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-09-30 10:16:26,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 10:16:26,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 10:16:26,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:16:26,894 INFO L87 Difference]: Start difference. First operand 1575 states and 2199 transitions. Second operand 20 states. [2018-09-30 10:16:33,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:33,929 INFO L93 Difference]: Finished difference Result 2646 states and 3763 transitions. [2018-09-30 10:16:33,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 10:16:33,929 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2018-09-30 10:16:33,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:33,938 INFO L225 Difference]: With dead ends: 2646 [2018-09-30 10:16:33,939 INFO L226 Difference]: Without dead ends: 2644 [2018-09-30 10:16:33,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4956 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3132, Invalid=9524, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 10:16:33,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2018-09-30 10:16:34,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 1833. [2018-09-30 10:16:34,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1833 states. [2018-09-30 10:16:34,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 2576 transitions. [2018-09-30 10:16:34,613 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 2576 transitions. Word has length 29 [2018-09-30 10:16:34,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:34,614 INFO L480 AbstractCegarLoop]: Abstraction has 1833 states and 2576 transitions. [2018-09-30 10:16:34,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 10:16:34,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 2576 transitions. [2018-09-30 10:16:34,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 10:16:34,616 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:34,616 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 10:16:34,616 INFO L423 AbstractCegarLoop]: === Iteration 40 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:34,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:34,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1030242552, now seen corresponding path program 2 times [2018-09-30 10:16:34,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:34,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:34,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:34,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:34,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:34,762 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 10:16:34,762 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:34,762 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:34,771 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:16:34,823 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:16:34,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:34,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:35,256 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 10:16:35,278 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:35,278 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2018-09-30 10:16:35,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 10:16:35,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 10:16:35,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2018-09-30 10:16:35,279 INFO L87 Difference]: Start difference. First operand 1833 states and 2576 transitions. Second operand 21 states. [2018-09-30 10:16:42,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:42,395 INFO L93 Difference]: Finished difference Result 2887 states and 4117 transitions. [2018-09-30 10:16:42,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 10:16:42,395 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2018-09-30 10:16:42,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:42,403 INFO L225 Difference]: With dead ends: 2887 [2018-09-30 10:16:42,403 INFO L226 Difference]: Without dead ends: 2885 [2018-09-30 10:16:42,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 5023 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3166, Invalid=9716, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 10:16:42,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2018-09-30 10:16:43,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2102. [2018-09-30 10:16:43,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2102 states. [2018-09-30 10:16:43,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 2970 transitions. [2018-09-30 10:16:43,153 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 2970 transitions. Word has length 29 [2018-09-30 10:16:43,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:43,153 INFO L480 AbstractCegarLoop]: Abstraction has 2102 states and 2970 transitions. [2018-09-30 10:16:43,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 10:16:43,153 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 2970 transitions. [2018-09-30 10:16:43,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 10:16:43,155 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:43,155 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 10:16:43,156 INFO L423 AbstractCegarLoop]: === Iteration 41 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:43,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:43,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1174012687, now seen corresponding path program 2 times [2018-09-30 10:16:43,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:43,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:43,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:43,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:43,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:43,279 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 10:16:43,280 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:43,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:43,288 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:16:43,345 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:16:43,346 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:43,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:43,562 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 10:16:43,583 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:43,583 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2018-09-30 10:16:43,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:16:43,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:16:43,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:16:43,584 INFO L87 Difference]: Start difference. First operand 2102 states and 2970 transitions. Second operand 16 states. [2018-09-30 10:16:49,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:49,086 INFO L93 Difference]: Finished difference Result 6948 states and 9725 transitions. [2018-09-30 10:16:49,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-30 10:16:49,086 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2018-09-30 10:16:49,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:49,099 INFO L225 Difference]: With dead ends: 6948 [2018-09-30 10:16:49,099 INFO L226 Difference]: Without dead ends: 4896 [2018-09-30 10:16:49,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6484 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2880, Invalid=14150, Unknown=0, NotChecked=0, Total=17030 [2018-09-30 10:16:49,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4896 states. [2018-09-30 10:16:50,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4896 to 3634. [2018-09-30 10:16:50,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3634 states. [2018-09-30 10:16:50,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 5080 transitions. [2018-09-30 10:16:50,551 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 5080 transitions. Word has length 33 [2018-09-30 10:16:50,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:50,551 INFO L480 AbstractCegarLoop]: Abstraction has 3634 states and 5080 transitions. [2018-09-30 10:16:50,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:16:50,552 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 5080 transitions. [2018-09-30 10:16:50,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 10:16:50,554 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:50,555 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 10:16:50,555 INFO L423 AbstractCegarLoop]: === Iteration 42 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:50,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:50,555 INFO L82 PathProgramCache]: Analyzing trace with hash -2110003385, now seen corresponding path program 1 times [2018-09-30 10:16:50,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:50,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:50,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:50,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:50,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:50,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:51,073 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 10:16:51,073 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:51,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:51,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:51,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:51,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:51,236 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 10:16:51,257 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:51,257 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2018-09-30 10:16:51,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 10:16:51,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 10:16:51,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:16:51,258 INFO L87 Difference]: Start difference. First operand 3634 states and 5080 transitions. Second operand 18 states. [2018-09-30 10:16:57,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:57,829 INFO L93 Difference]: Finished difference Result 5436 states and 7576 transitions. [2018-09-30 10:16:57,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 10:16:57,829 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2018-09-30 10:16:57,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:57,841 INFO L225 Difference]: With dead ends: 5436 [2018-09-30 10:16:57,841 INFO L226 Difference]: Without dead ends: 5349 [2018-09-30 10:16:57,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2508 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1401, Invalid=6609, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 10:16:57,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5349 states. [2018-09-30 10:16:59,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5349 to 4022. [2018-09-30 10:16:59,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4022 states. [2018-09-30 10:16:59,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4022 states to 4022 states and 5648 transitions. [2018-09-30 10:16:59,450 INFO L78 Accepts]: Start accepts. Automaton has 4022 states and 5648 transitions. Word has length 33 [2018-09-30 10:16:59,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:59,451 INFO L480 AbstractCegarLoop]: Abstraction has 4022 states and 5648 transitions. [2018-09-30 10:16:59,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 10:16:59,451 INFO L276 IsEmpty]: Start isEmpty. Operand 4022 states and 5648 transitions. [2018-09-30 10:16:59,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 10:16:59,454 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:59,454 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 10:16:59,454 INFO L423 AbstractCegarLoop]: === Iteration 43 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:59,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:59,454 INFO L82 PathProgramCache]: Analyzing trace with hash -895180230, now seen corresponding path program 3 times [2018-09-30 10:16:59,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:59,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:59,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:59,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:59,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:59,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:59,887 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 10:16:59,887 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:59,887 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:59,895 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:16:59,954 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 10:16:59,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:59,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:01,341 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 10:17:01,362 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:01,362 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2018-09-30 10:17:01,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 10:17:01,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 10:17:01,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:17:01,363 INFO L87 Difference]: Start difference. First operand 4022 states and 5648 transitions. Second operand 22 states. [2018-09-30 10:17:13,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:13,305 INFO L93 Difference]: Finished difference Result 8032 states and 11417 transitions. [2018-09-30 10:17:13,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-09-30 10:17:13,306 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 33 [2018-09-30 10:17:13,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:13,323 INFO L225 Difference]: With dead ends: 8032 [2018-09-30 10:17:13,323 INFO L226 Difference]: Without dead ends: 7935 [2018-09-30 10:17:13,328 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 10:17:13,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7935 states. [2018-09-30 10:17:15,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7935 to 4327. [2018-09-30 10:17:15,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4327 states. [2018-09-30 10:17:15,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4327 states to 4327 states and 6121 transitions. [2018-09-30 10:17:15,206 INFO L78 Accepts]: Start accepts. Automaton has 4327 states and 6121 transitions. Word has length 33 [2018-09-30 10:17:15,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:15,206 INFO L480 AbstractCegarLoop]: Abstraction has 4327 states and 6121 transitions. [2018-09-30 10:17:15,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 10:17:15,206 INFO L276 IsEmpty]: Start isEmpty. Operand 4327 states and 6121 transitions. [2018-09-30 10:17:15,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 10:17:15,210 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:15,211 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 10:17:15,211 INFO L423 AbstractCegarLoop]: === Iteration 44 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:15,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:15,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1250173630, now seen corresponding path program 1 times [2018-09-30 10:17:15,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:15,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:15,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:15,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:17:15,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:15,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:15,353 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 10:17:15,353 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:15,354 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:17:15,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:17:15,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:15,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:15,542 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 10:17:15,563 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:15,563 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2018-09-30 10:17:15,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 10:17:15,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 10:17:15,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:17:15,564 INFO L87 Difference]: Start difference. First operand 4327 states and 6121 transitions. Second operand 19 states. [2018-09-30 10:17:24,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:24,010 INFO L93 Difference]: Finished difference Result 9177 states and 12958 transitions. [2018-09-30 10:17:24,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 10:17:24,011 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2018-09-30 10:17:24,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:24,025 INFO L225 Difference]: With dead ends: 9177 [2018-09-30 10:17:24,025 INFO L226 Difference]: Without dead ends: 5991 [2018-09-30 10:17:24,035 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 10:17:24,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5991 states. [2018-09-30 10:17:25,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5991 to 4147. [2018-09-30 10:17:25,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4147 states. [2018-09-30 10:17:25,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4147 states to 4147 states and 5817 transitions. [2018-09-30 10:17:25,908 INFO L78 Accepts]: Start accepts. Automaton has 4147 states and 5817 transitions. Word has length 33 [2018-09-30 10:17:25,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:25,908 INFO L480 AbstractCegarLoop]: Abstraction has 4147 states and 5817 transitions. [2018-09-30 10:17:25,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 10:17:25,909 INFO L276 IsEmpty]: Start isEmpty. Operand 4147 states and 5817 transitions. [2018-09-30 10:17:25,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 10:17:25,912 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:25,912 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 10:17:25,912 INFO L423 AbstractCegarLoop]: === Iteration 45 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:25,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:25,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1810158453, now seen corresponding path program 2 times [2018-09-30 10:17:25,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:25,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:25,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:25,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:17:25,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:25,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:26,936 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 10:17:26,937 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:26,937 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:17:26,944 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:17:26,998 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:17:26,998 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:17:27,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:27,131 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 10:17:27,151 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:27,152 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2018-09-30 10:17:27,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 10:17:27,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 10:17:27,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:17:27,152 INFO L87 Difference]: Start difference. First operand 4147 states and 5817 transitions. Second operand 18 states. [2018-09-30 10:17:32,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:32,468 INFO L93 Difference]: Finished difference Result 5255 states and 7327 transitions. [2018-09-30 10:17:32,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 10:17:32,469 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2018-09-30 10:17:32,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:32,477 INFO L225 Difference]: With dead ends: 5255 [2018-09-30 10:17:32,477 INFO L226 Difference]: Without dead ends: 5253 [2018-09-30 10:17:32,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=346, Invalid=1460, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 10:17:32,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5253 states. [2018-09-30 10:17:34,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5253 to 4447. [2018-09-30 10:17:34,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4447 states. [2018-09-30 10:17:34,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4447 states to 4447 states and 6228 transitions. [2018-09-30 10:17:34,535 INFO L78 Accepts]: Start accepts. Automaton has 4447 states and 6228 transitions. Word has length 33 [2018-09-30 10:17:34,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:34,535 INFO L480 AbstractCegarLoop]: Abstraction has 4447 states and 6228 transitions. [2018-09-30 10:17:34,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 10:17:34,535 INFO L276 IsEmpty]: Start isEmpty. Operand 4447 states and 6228 transitions. [2018-09-30 10:17:34,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 10:17:34,539 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:34,539 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 10:17:34,539 INFO L423 AbstractCegarLoop]: === Iteration 46 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:34,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:34,539 INFO L82 PathProgramCache]: Analyzing trace with hash -667748710, now seen corresponding path program 1 times [2018-09-30 10:17:34,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:34,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:34,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:34,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:17:34,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:34,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:34,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:34,709 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:34,709 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:17:34,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:17:34,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:34,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:34,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 10:17:34,913 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:34,913 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2018-09-30 10:17:34,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 10:17:34,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 10:17:34,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:17:34,914 INFO L87 Difference]: Start difference. First operand 4447 states and 6228 transitions. Second operand 18 states. [2018-09-30 10:17:45,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:45,192 INFO L93 Difference]: Finished difference Result 7721 states and 10805 transitions. [2018-09-30 10:17:45,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 10:17:45,192 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2018-09-30 10:17:45,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:45,201 INFO L225 Difference]: With dead ends: 7721 [2018-09-30 10:17:45,201 INFO L226 Difference]: Without dead ends: 7719 [2018-09-30 10:17:45,203 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 10:17:45,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7719 states. [2018-09-30 10:17:47,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7719 to 5438. [2018-09-30 10:17:47,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5438 states. [2018-09-30 10:17:47,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5438 states to 5438 states and 7651 transitions. [2018-09-30 10:17:47,589 INFO L78 Accepts]: Start accepts. Automaton has 5438 states and 7651 transitions. Word has length 33 [2018-09-30 10:17:47,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:47,589 INFO L480 AbstractCegarLoop]: Abstraction has 5438 states and 7651 transitions. [2018-09-30 10:17:47,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 10:17:47,589 INFO L276 IsEmpty]: Start isEmpty. Operand 5438 states and 7651 transitions. [2018-09-30 10:17:47,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 10:17:47,593 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:47,593 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 10:17:47,593 INFO L423 AbstractCegarLoop]: === Iteration 47 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:47,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:47,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1146614399, now seen corresponding path program 2 times [2018-09-30 10:17:47,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:47,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:47,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:47,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:17:47,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:47,702 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 10:17:47,702 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:47,702 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:17:47,710 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:17:47,764 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:17:47,764 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:17:47,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:47,856 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 10:17:47,877 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:47,877 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2018-09-30 10:17:47,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:17:47,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:17:47,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:17:47,878 INFO L87 Difference]: Start difference. First operand 5438 states and 7651 transitions. Second operand 16 states. [2018-09-30 10:17:51,473 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-09-30 10:17:51,906 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-09-30 10:17:57,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:57,241 INFO L93 Difference]: Finished difference Result 15976 states and 22278 transitions. [2018-09-30 10:17:57,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-30 10:17:57,241 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2018-09-30 10:17:57,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:57,254 INFO L225 Difference]: With dead ends: 15976 [2018-09-30 10:17:57,254 INFO L226 Difference]: Without dead ends: 10483 [2018-09-30 10:17:57,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6466 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2880, Invalid=14150, Unknown=0, NotChecked=0, Total=17030 [2018-09-30 10:17:57,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10483 states. [2018-09-30 10:18:00,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10483 to 8111. [2018-09-30 10:18:00,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8111 states. [2018-09-30 10:18:00,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8111 states to 8111 states and 11260 transitions. [2018-09-30 10:18:00,958 INFO L78 Accepts]: Start accepts. Automaton has 8111 states and 11260 transitions. Word has length 33 [2018-09-30 10:18:00,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:00,959 INFO L480 AbstractCegarLoop]: Abstraction has 8111 states and 11260 transitions. [2018-09-30 10:18:00,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:18:00,959 INFO L276 IsEmpty]: Start isEmpty. Operand 8111 states and 11260 transitions. [2018-09-30 10:18:00,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 10:18:00,963 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:00,963 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 10:18:00,964 INFO L423 AbstractCegarLoop]: === Iteration 48 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:00,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:00,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1449531796, now seen corresponding path program 1 times [2018-09-30 10:18:00,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:00,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:00,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:00,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:00,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:01,090 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:01,090 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:01,090 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:01,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:01,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:01,271 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 10:18:01,292 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:01,292 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2018-09-30 10:18:01,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 10:18:01,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 10:18:01,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:18:01,293 INFO L87 Difference]: Start difference. First operand 8111 states and 11260 transitions. Second operand 19 states. [2018-09-30 10:18:10,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:10,300 INFO L93 Difference]: Finished difference Result 10277 states and 14246 transitions. [2018-09-30 10:18:10,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 10:18:10,300 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2018-09-30 10:18:10,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:10,312 INFO L225 Difference]: With dead ends: 10277 [2018-09-30 10:18:10,312 INFO L226 Difference]: Without dead ends: 10275 [2018-09-30 10:18:10,314 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 10:18:10,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10275 states. [2018-09-30 10:18:14,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10275 to 8291. [2018-09-30 10:18:14,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8291 states. [2018-09-30 10:18:14,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8291 states to 8291 states and 11531 transitions. [2018-09-30 10:18:14,274 INFO L78 Accepts]: Start accepts. Automaton has 8291 states and 11531 transitions. Word has length 33 [2018-09-30 10:18:14,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:14,274 INFO L480 AbstractCegarLoop]: Abstraction has 8291 states and 11531 transitions. [2018-09-30 10:18:14,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 10:18:14,274 INFO L276 IsEmpty]: Start isEmpty. Operand 8291 states and 11531 transitions. [2018-09-30 10:18:14,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 10:18:14,280 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:14,280 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 10:18:14,280 INFO L423 AbstractCegarLoop]: === Iteration 49 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:14,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:14,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1026480992, now seen corresponding path program 1 times [2018-09-30 10:18:14,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:14,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:14,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:14,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:14,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:14,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:14,416 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 10:18:14,417 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:14,417 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:14,427 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:14,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:14,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:14,598 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 10:18:14,618 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:14,619 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2018-09-30 10:18:14,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 10:18:14,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 10:18:14,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:18:14,619 INFO L87 Difference]: Start difference. First operand 8291 states and 11531 transitions. Second operand 19 states. [2018-09-30 10:18:24,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:24,799 INFO L93 Difference]: Finished difference Result 16294 states and 22694 transitions. [2018-09-30 10:18:24,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 10:18:24,800 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2018-09-30 10:18:24,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:24,813 INFO L225 Difference]: With dead ends: 16294 [2018-09-30 10:18:24,813 INFO L226 Difference]: Without dead ends: 9999 [2018-09-30 10:18:24,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4530 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2859, Invalid=11183, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 10:18:24,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9999 states. [2018-09-30 10:18:28,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9999 to 8241. [2018-09-30 10:18:28,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8241 states. [2018-09-30 10:18:28,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8241 states to 8241 states and 11466 transitions. [2018-09-30 10:18:28,826 INFO L78 Accepts]: Start accepts. Automaton has 8241 states and 11466 transitions. Word has length 33 [2018-09-30 10:18:28,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:28,826 INFO L480 AbstractCegarLoop]: Abstraction has 8241 states and 11466 transitions. [2018-09-30 10:18:28,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 10:18:28,826 INFO L276 IsEmpty]: Start isEmpty. Operand 8241 states and 11466 transitions. [2018-09-30 10:18:28,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 10:18:28,830 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:28,830 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 10:18:28,830 INFO L423 AbstractCegarLoop]: === Iteration 50 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:28,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:28,831 INFO L82 PathProgramCache]: Analyzing trace with hash 610357864, now seen corresponding path program 3 times [2018-09-30 10:18:28,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:28,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:28,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:28,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:28,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:28,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:29,169 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 10:18:29,169 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:29,170 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:29,177 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:18:29,228 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 10:18:29,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:29,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:29,335 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 10:18:29,356 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:29,356 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 21 [2018-09-30 10:18:29,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 10:18:29,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 10:18:29,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2018-09-30 10:18:29,357 INFO L87 Difference]: Start difference. First operand 8241 states and 11466 transitions. Second operand 21 states. [2018-09-30 10:18:49,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:49,276 INFO L93 Difference]: Finished difference Result 25684 states and 35500 transitions. [2018-09-30 10:18:49,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2018-09-30 10:18:49,276 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 33 [2018-09-30 10:18:49,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:49,296 INFO L225 Difference]: With dead ends: 25684 [2018-09-30 10:18:49,296 INFO L226 Difference]: Without dead ends: 16698 [2018-09-30 10:18:49,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18096 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=6678, Invalid=35142, Unknown=0, NotChecked=0, Total=41820 [2018-09-30 10:18:49,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16698 states. [2018-09-30 10:18:54,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16698 to 10011. [2018-09-30 10:18:54,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10011 states. [2018-09-30 10:18:54,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10011 states to 10011 states and 13930 transitions. [2018-09-30 10:18:54,247 INFO L78 Accepts]: Start accepts. Automaton has 10011 states and 13930 transitions. Word has length 33 [2018-09-30 10:18:54,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:54,247 INFO L480 AbstractCegarLoop]: Abstraction has 10011 states and 13930 transitions. [2018-09-30 10:18:54,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 10:18:54,248 INFO L276 IsEmpty]: Start isEmpty. Operand 10011 states and 13930 transitions. [2018-09-30 10:18:54,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 10:18:54,252 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:54,252 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 10:18:54,252 INFO L423 AbstractCegarLoop]: === Iteration 51 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:54,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:54,252 INFO L82 PathProgramCache]: Analyzing trace with hash 690693469, now seen corresponding path program 1 times [2018-09-30 10:18:54,252 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:54,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:54,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:54,253 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:54,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:54,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:54,456 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 10:18:54,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:54,456 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:54,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:54,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:54,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:54,657 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 10:18:54,677 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:54,677 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2018-09-30 10:18:54,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 10:18:54,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 10:18:54,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2018-09-30 10:18:54,678 INFO L87 Difference]: Start difference. First operand 10011 states and 13930 transitions. Second operand 21 states. [2018-09-30 10:19:06,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:06,816 INFO L93 Difference]: Finished difference Result 12668 states and 17557 transitions. [2018-09-30 10:19:06,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 10:19:06,817 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 33 [2018-09-30 10:19:06,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:06,832 INFO L225 Difference]: With dead ends: 12668 [2018-09-30 10:19:06,832 INFO L226 Difference]: Without dead ends: 12586 [2018-09-30 10:19:06,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2220 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=841, Invalid=6131, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 10:19:06,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12586 states. [2018-09-30 10:19:12,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12586 to 10468. [2018-09-30 10:19:12,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10468 states. [2018-09-30 10:19:12,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10468 states to 10468 states and 14569 transitions. [2018-09-30 10:19:12,156 INFO L78 Accepts]: Start accepts. Automaton has 10468 states and 14569 transitions. Word has length 33 [2018-09-30 10:19:12,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:12,156 INFO L480 AbstractCegarLoop]: Abstraction has 10468 states and 14569 transitions. [2018-09-30 10:19:12,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 10:19:12,156 INFO L276 IsEmpty]: Start isEmpty. Operand 10468 states and 14569 transitions. [2018-09-30 10:19:12,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 10:19:12,163 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:12,163 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:19:12,164 INFO L423 AbstractCegarLoop]: === Iteration 52 === [l1l0Err0ASSERT_VIOLATIONASSERT, l0l1Err0ASSERT_VIOLATIONASSERT, l1l1Err0ASSERT_VIOLATIONASSERT, l1l1Err1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:12,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:12,164 INFO L82 PathProgramCache]: Analyzing trace with hash -2121918017, now seen corresponding path program 3 times [2018-09-30 10:19:12,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:12,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:12,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:12,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:12,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:12,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:12,308 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:12,308 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:12,316 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:19:12,369 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 10:19:12,369 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:12,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:12,469 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:12,489 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:12,490 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-09-30 10:19:12,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 10:19:12,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 10:19:12,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:19:12,490 INFO L87 Difference]: Start difference. First operand 10468 states and 14569 transitions. Second operand 17 states. Received shutdown request... [2018-09-30 10:19:15,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 10:19:15,680 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 10:19:15,686 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 10:19:15,686 INFO L202 PluginConnector]: Adding new model threadpooling_product_WithProcedures.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 10:19:15 BoogieIcfgContainer [2018-09-30 10:19:15,686 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 10:19:15,687 INFO L168 Benchmark]: Toolchain (without parser) took 252940.46 ms. Allocated memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: 2.4 GB). Free memory was 1.4 GB in the beginning and 2.6 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-09-30 10:19:15,688 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 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 10:19:15,688 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.78 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 10:19:15,689 INFO L168 Benchmark]: Boogie Preprocessor took 23.59 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 10:19:15,689 INFO L168 Benchmark]: RCFGBuilder took 592.39 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 10:19:15,690 INFO L168 Benchmark]: TraceAbstraction took 252278.68 ms. Allocated memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: 2.4 GB). Free memory was 1.4 GB in the beginning and 2.6 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-09-30 10:19:15,693 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 0.18 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 39.78 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 23.59 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 592.39 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 252278.68 ms. Allocated memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: 2.4 GB). Free memory was 1.4 GB in the beginning and 2.6 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 66). Cancelled while BasicCegarLoop was constructing difference of abstraction (10468states) and FLOYD_HOARE automaton (currently 31 states, 17 states before enhancement), while ReachableStatesComputation was computing reachable states (1662 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 99). Cancelled while BasicCegarLoop was constructing difference of abstraction (10468states) and FLOYD_HOARE automaton (currently 31 states, 17 states before enhancement), while ReachableStatesComputation was computing reachable states (1662 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 112]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 112). Cancelled while BasicCegarLoop was constructing difference of abstraction (10468states) and FLOYD_HOARE automaton (currently 31 states, 17 states before enhancement), while ReachableStatesComputation was computing reachable states (1662 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 121]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 121). Cancelled while BasicCegarLoop was constructing difference of abstraction (10468states) and FLOYD_HOARE automaton (currently 31 states, 17 states before enhancement), while ReachableStatesComputation was computing reachable states (1662 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 48 locations, 4 error locations. TIMEOUT Result, 252.2s OverallTime, 52 OverallIterations, 4 TraceHistogramMax, 187.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3837 SDtfs, 10563 SDslu, 7594 SDs, 0 SdLazy, 53635 SolverSat, 14210 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 53.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3933 GetRequests, 1075 SyntacticMatches, 12 SemanticMatches, 2846 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 86160 ImplicationChecksByTransitivity, 73.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10468occurred in iteration=51, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 41.3s AutomataMinimizationTime, 51 MinimizatonAttempts, 34219 StatesRemovedByMinimization, 51 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 18.8s InterpolantComputationTime, 2174 NumberOfCodeBlocks, 2174 NumberOfCodeBlocksAsserted, 112 NumberOfCheckSat, 2073 ConstructedInterpolants, 35 QuantifiedInterpolants, 234989 SizeOfPredicates, 824 NumberOfNonLiveVariables, 14651 ConjunctsInSsa, 1557 ConjunctsInUnsatCore, 101 InterpolantComputations, 9 PerfectInterpolantSequences, 199/838 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/threadpooling_product_WithProcedures.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_10-19-15-702.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_10-19-15-702.csv Completed graceful shutdown